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diff --git a/docs/logic_tile.html b/docs/logic_tile.html index 6404a80..67524bb 100644 --- a/docs/logic_tile.html +++ b/docs/logic_tile.html @@ -1,4 +1,18 @@ +<!DOCTYPE html> +<html><head><meta charset="UTF-8"> +<style> +.ctab { + margin-left: auto; + margin-right: auto; + border: 1px solid gray; +} +.ctab td, .ctab th { + padding: 3px; + border: 1px solid gray; +} +</style> <title>Project IceStorm – LOGIC Tile Documentation</title> +</head><body> <h1>Project IceStorm – LOGIC Tile Documentation</h1> <p> @@ -15,9 +29,9 @@ The <i>span-4</i> and <i>span-12</i> wires are the main interconnect resource in </p> <p> -The bits marked <tt>routing</tt> in the bitstream do enable switches (transfer gates) that can +The bits marked <span style="font-family:monospace">routing</span> in the bitstream do enable switches (transfer gates) that can be used to connect wire segments bidirectionally to each other in order to create larger -segments. The bits marked <tt>buffer</tt> in the bitstream enable tristate buffers that drive +segments. The bits marked <span style="font-family:monospace">buffer</span> in the bitstream enable tristate buffers that drive the signal in one direction from one wire to another. Both types of bits exist for routing between span-wires. See the auto generated documentation for the LOGIC Tile configuration bits for details. </p> @@ -28,21 +42,21 @@ Only directional tristate buffers are used to route signals between the span-wir <h3 style="clear:both">Span-4 Horizontal</h3> -<p><a href="sp4h.svg"><img style="float:right; padding:1em; padding-top:0" height="200" src="sp4h.svg" border="0"></a></p> +<p><a href="sp4h.svg"><img alt="Span-4 Horizontal" style="float:right; padding:1em; padding-top:0; border:0" height="200" src="sp4h.svg"></a></p> <p> The image on the right shows the <i>horizontal span-4</i> wires of a logic or ram cell (click to enlarge). </p> <p> -On the left side of the cell there are 48 connections named <tt>sp4_h_l_0</tt> to <tt>sp4_h_l_47</tt>. The lower 36 of those -wires are connected to <tt>sp4_h_r_12</tt> to <tt>sp4_h_r_47</tt> on the right side of the cell. (IceStorm normalizes this -wire names to <tt>sp4_h_r_0</tt> to <tt>sp4_h_r_35</tt>. Note: the Lattice tools use a different normalization scheme +On the left side of the cell there are 48 connections named <span style="font-family:monospace">sp4_h_l_0</span> to <span style="font-family:monospace">sp4_h_l_47</span>. The lower 36 of those +wires are connected to <span style="font-family:monospace">sp4_h_r_12</span> to <span style="font-family:monospace">sp4_h_r_47</span> on the right side of the cell. (IceStorm normalizes this +wire names to <span style="font-family:monospace">sp4_h_r_0</span> to <span style="font-family:monospace">sp4_h_r_35</span>. Note: the Lattice tools use a different normalization scheme for this wire names.) The wires connecting the left and right horizontal span-4 ports are pairwise crossed-out. </p> <p> -The wires <tt>sp4_h_l_36</tt> to <tt>sp4_h_l_47</tt> terminate in the cell, so do the wires <tt>sp4_h_r_0</tt> to <tt>sp4_h_r_11</tt>. +The wires <span style="font-family:monospace">sp4_h_l_36</span> to <span style="font-family:monospace">sp4_h_l_47</span> terminate in the cell, so do the wires <span style="font-family:monospace">sp4_h_r_0</span> to <span style="font-family:monospace">sp4_h_r_11</span>. </p> <p> @@ -51,55 +65,51 @@ both ends of the wire. </p> <p> -For example, the wire <tt>sp4_h_r_0</tt> in cell (x, y) has the following names: +For example, the wire <span style="font-family:monospace">sp4_h_r_0</span> in cell (x, y) has the following names: </p> -<p align="center"> -<table border> +<table class="ctab"> <tr><th>Cell Coordinates</th><th>sp4_h_l_* wire name</th><th>sp4_h_r_* wire name</th></tr> -<tr><td>x, y</td><td><tt>-</tt></td><td><tt>sp4_h_r_0</tt></td></tr> -<tr><td>x+1, y</td><td><tt>sp4_h_l_0</tt></td><td><tt>sp4_h_r_13</tt></td></tr> -<tr><td>x+2, y</td><td><tt>sp4_h_l_13</tt></td><td><tt>sp4_h_r_24</tt></td></tr> -<tr><td>x+3, y</td><td><tt>sp4_h_l_24</tt></td><td><tt>sp4_h_r_37</tt></td></tr> -<tr><td>x+4, y</td><td><tt>sp4_h_l_37</tt></td><td><tt>-</tt></td></tr> +<tr><td>x, y</td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">sp4_h_r_0</span></td></tr> +<tr><td>x+1, y</td><td><span style="font-family:monospace">sp4_h_l_0</span></td><td><span style="font-family:monospace">sp4_h_r_13</span></td></tr> +<tr><td>x+2, y</td><td><span style="font-family:monospace">sp4_h_l_13</span></td><td><span style="font-family:monospace">sp4_h_r_24</span></td></tr> +<tr><td>x+3, y</td><td><span style="font-family:monospace">sp4_h_l_24</span></td><td><span style="font-family:monospace">sp4_h_r_37</span></td></tr> +<tr><td>x+4, y</td><td><span style="font-family:monospace">sp4_h_l_37</span></td><td><span style="font-family:monospace">-</span></td></tr> </table> -</p> <h3 style="clear:both">Span-4 Vertical</h3> -<p><a href="sp4v.svg"><img style="float:right; padding:1em; padding-top:0" height="200" src="sp4v.svg" border="0"></a></p> +<p><a href="sp4v.svg"><img alt="Span-4 Vertical" style="float:right; padding:1em; padding-top:0; border:0" height="200" src="sp4v.svg"></a></p> <p> The image on the right shows the <i>vertical span-4</i> wires of a logic or ram cell (click to enlarge). </p> <p> -Similar to the horizontal span-4 wires there are 48 connections on the top (<tt>sp4_v_t_0</tt> to <tt>sp4_v_t_47</tt>) and -48 connections on the bottom (<tt>sp4_v_b_0</tt> to <tt>sp4_v_b_47</tt>). The wires <tt>sp4_v_t_0</tt> to <tt>sp4_v_t_35</tt> -are connected to <tt>sp4_v_b_12</tt> to <tt>sp4_v_b_47</tt> (with pairwise crossing out). Wire names are normalized -to <tt>sp4_v_b_12</tt> to <tt>sp4_v_b_47</tt>. +Similar to the horizontal span-4 wires there are 48 connections on the top (<span style="font-family:monospace">sp4_v_t_0</span> to <span style="font-family:monospace">sp4_v_t_47</span>) and +48 connections on the bottom (<span style="font-family:monospace">sp4_v_b_0</span> to <span style="font-family:monospace">sp4_v_b_47</span>). The wires <span style="font-family:monospace">sp4_v_t_0</span> to <span style="font-family:monospace">sp4_v_t_35</span> +are connected to <span style="font-family:monospace">sp4_v_b_12</span> to <span style="font-family:monospace">sp4_v_b_47</span> (with pairwise crossing out). Wire names are normalized +to <span style="font-family:monospace">sp4_v_b_12</span> to <span style="font-family:monospace">sp4_v_b_47</span>. </p> <p> -But in addition to that, each cell also has access to <tt>sp4_v_b_0</tt> to <tt>sp4_v_b_47</tt> of its right neighbour. -This are the wires <tt>sp4_r_v_b_0</tt> to <tt>sp4_r_v_b_47</tt>. So over all a single vertical span-4 wire -connects 9 cells. For example, the wire <tt>sp4_v_b_0</tt> in cell (x, y) has the following names: +But in addition to that, each cell also has access to <span style="font-family:monospace">sp4_v_b_0</span> to <span style="font-family:monospace">sp4_v_b_47</span> of its right neighbour. +This are the wires <span style="font-family:monospace">sp4_r_v_b_0</span> to <span style="font-family:monospace">sp4_r_v_b_47</span>. So over all a single vertical span-4 wire +connects 9 cells. For example, the wire <span style="font-family:monospace">sp4_v_b_0</span> in cell (x, y) has the following names: </p> -<p align="center"> -<table border> +<table class="ctab"> <tr><th>Cell Coordinates</th><th>sp4_v_t_* wire name</th><th>sp4_v_b_* wire name</th><th>sp4_r_v_b_* wire name</th></tr> -<tr><td>x, y</td><td><tt>-</tt></td><td><tt>sp4_v_b_0</tt></td><td><tt>-</tt></td></tr> -<tr><td>x, y-1</td><td><tt>sp4_v_t_0</tt></td><td><tt>sp4_v_b_13</tt></td><td><tt>-</tt></td></tr> -<tr><td>x, y-2</td><td><tt>sp4_v_t_13</tt></td><td><tt>sp4_v_b_24</tt></td><td><tt>-</tt></td></tr> -<tr><td>x, y-3</td><td><tt>sp4_v_t_24</tt></td><td><tt>sp4_v_b_37</tt></td><td><tt>-</tt></td></tr> -<tr><td>x, y-4</td><td><tt>sp4_v_t_37</tt></td><td><tt>-</tt></td><td><tt>-</tt></td></tr> -<tr><td>x-1, y</td><td><tt>-</tt></td><td><tt>-</tt></td><td><tt>sp4_r_v_b_0</tt></td></tr> -<tr><td>x-1, y-1</td><td><tt>-</tt></td><td><tt>-</tt></td><td><tt>sp4_r_v_b_13</tt></td></tr> -<tr><td>x-1, y-2</td><td><tt>-</tt></td><td><tt>-</tt></td><td><tt>sp4_r_v_b_24</tt></td></tr> -<tr><td>x-1, y-3</td><td><tt>-</tt></td><td><tt>-</tt></td><td><tt>sp4_r_v_b_37</tt></td></tr> +<tr><td>x, y</td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">sp4_v_b_0</span></td><td><span style="font-family:monospace">-</span></td></tr> +<tr><td>x, y-1</td><td><span style="font-family:monospace">sp4_v_t_0</span></td><td><span style="font-family:monospace">sp4_v_b_13</span></td><td><span style="font-family:monospace">-</span></td></tr> +<tr><td>x, y-2</td><td><span style="font-family:monospace">sp4_v_t_13</span></td><td><span style="font-family:monospace">sp4_v_b_24</span></td><td><span style="font-family:monospace">-</span></td></tr> +<tr><td>x, y-3</td><td><span style="font-family:monospace">sp4_v_t_24</span></td><td><span style="font-family:monospace">sp4_v_b_37</span></td><td><span style="font-family:monospace">-</span></td></tr> +<tr><td>x, y-4</td><td><span style="font-family:monospace">sp4_v_t_37</span></td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">-</span></td></tr> +<tr><td>x-1, y</td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">sp4_r_v_b_0</span></td></tr> +<tr><td>x-1, y-1</td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">sp4_r_v_b_13</span></td></tr> +<tr><td>x-1, y-2</td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">sp4_r_v_b_24</span></td></tr> +<tr><td>x-1, y-3</td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">-</span></td><td><span style="font-family:monospace">sp4_r_v_b_37</span></td></tr> </table> -</p> <h3 style="clear:both">Span-12 Horizontal and Vertical</h3> @@ -108,21 +118,21 @@ Similar to the span-4 wires there are also longer horizontal and vertical span-1 </p> <p> -There are 24 connections <tt>sp12_v_t_0</tt> to <tt>sp12_v_t_23</tt> on the top of the -cell and 24 connections <tt>sp12_v_b_0</tt> to <tt>sp12_v_b_23</tt> on the bottom of the -cell. The wires <tt>sp12_v_t_0</tt> to <tt>sp12_v_t_21</tt> are connected to -<tt>sp12_v_b_2</tt> to <tt>sp12_v_b_23</tt> (with pairwise crossing out). The connections -<tt>sp12_v_b_0</tt>, <tt>sp12_v_b_1</tt>, <tt>sp12_v_t_22</tt>, and <tt>sp12_v_t_23</tt> -terminate in the cell. Wire names are normalized to <tt>sp12_v_b_2</tt> to <tt>sp12_v_b_23</tt>. +There are 24 connections <span style="font-family:monospace">sp12_v_t_0</span> to <span style="font-family:monospace">sp12_v_t_23</span> on the top of the +cell and 24 connections <span style="font-family:monospace">sp12_v_b_0</span> to <span style="font-family:monospace">sp12_v_b_23</span> on the bottom of the +cell. The wires <span style="font-family:monospace">sp12_v_t_0</span> to <span style="font-family:monospace">sp12_v_t_21</span> are connected to +<span style="font-family:monospace">sp12_v_b_2</span> to <span style="font-family:monospace">sp12_v_b_23</span> (with pairwise crossing out). The connections +<span style="font-family:monospace">sp12_v_b_0</span>, <span style="font-family:monospace">sp12_v_b_1</span>, <span style="font-family:monospace">sp12_v_t_22</span>, and <span style="font-family:monospace">sp12_v_t_23</span> +terminate in the cell. Wire names are normalized to <span style="font-family:monospace">sp12_v_b_2</span> to <span style="font-family:monospace">sp12_v_b_23</span>. </p> <p> -There are also 24 connections <tt>sp12_h_l_0</tt> to <tt>sp12_h_l_23</tt> on the left of the -cell and 24 connections <tt>sp12_h_r_0</tt> to <tt>sp12_h_r_23</tt> on the right of the -cell. The wires <tt>sp12_h_l_0</tt> to <tt>sp12_h_l_21</tt> are connected to -<tt>sp12_h_r_2</tt> to <tt>sp12_h_r_23</tt> (with pairwise crossing out). The connections -<tt>sp12_h_r_0</tt>, <tt>sp12_h_r_1</tt>, <tt>sp12_h_l_22</tt>, and <tt>sp12_h_l_23</tt> -terminate in the cell. Wire names are normalized to <tt>sp12_v_r_2</tt> to <tt>sp12_h_r_23</tt>. +There are also 24 connections <span style="font-family:monospace">sp12_h_l_0</span> to <span style="font-family:monospace">sp12_h_l_23</span> on the left of the +cell and 24 connections <span style="font-family:monospace">sp12_h_r_0</span> to <span style="font-family:monospace">sp12_h_r_23</span> on the right of the +cell. The wires <span style="font-family:monospace">sp12_h_l_0</span> to <span style="font-family:monospace">sp12_h_l_21</span> are connected to +<span style="font-family:monospace">sp12_h_r_2</span> to <span style="font-family:monospace">sp12_h_r_23</span> (with pairwise crossing out). The connections +<span style="font-family:monospace">sp12_h_r_0</span>, <span style="font-family:monospace">sp12_h_r_1</span>, <span style="font-family:monospace">sp12_h_l_22</span>, and <span style="font-family:monospace">sp12_h_l_23</span> +terminate in the cell. Wire names are normalized to <span style="font-family:monospace">sp12_v_r_2</span> to <span style="font-family:monospace">sp12_h_r_23</span>. </p> <h2>Local Tracks</h2> @@ -135,7 +145,7 @@ signals from the local tracks can be routed to the logic cell inputs. <p> Each logic tile has 32 local tracks. They are organized in 4 groups of 8 wires each: -<tt>local_g0_0</tt> to <tt>local_g3_7</tt>. +<span style="font-family:monospace">local_g0_0</span> to <span style="font-family:monospace">local_g3_7</span>. </p> <p> @@ -146,71 +156,59 @@ mix of 16 signals for each local track. <p> The buffer driving the local track has 5 configuration bits. One enable bit and 4 bits that select -the input wire. For example for <tt>local_g0_0</tt> (copy&paste from the bitstream doku): +the input wire. For example for <span style="font-family:monospace">local_g0_0</span> (copy&paste from the bitstream doku): </p> -<p align="center"> -<table border=""><tbody><tr> -<th style="width:5em"><a name="B.0.14">B0[14]</a></th> -<th style="width:5em"><a name="B.1.14">B1[14]</a></th> -<th style="width:5em"><a name="B.1.15">B1[15]</a></th> -<th style="width:5em"><a name="B.1.16">B1[16]</a></th> -<th style="width:5em"><a name="B.1.17">B1[17]</a></th> +<table class="ctab"> +<tr><th style="width:5em">B0[14]</th><th style="width:5em">B1[14]</th><th style="width:5em">B1[15]</th><th style="width:5em">B1[16]</th> <th style="width:5em">B1[17]</th> <th style="width:5em">Function</th><th style="width:15em">Source-Net</th><th style="width:15em">Destination-Net</th></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_r_v_b_24</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp12_h_r_8</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>neigh_op_bot_0</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_v_b_16</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_r_v_b_35</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp12_h_r_16</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>neigh_op_top_0</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_h_r_0</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>lutff_0/out</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_v_b_0</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>neigh_op_lft_0</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_h_r_8</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>neigh_op_bnr_0</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_v_b_8</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp12_h_r_0</tt></td><td><tt>local_g0_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>sp4_h_r_16</tt></td><td><tt>local_g0_0</tt></td></tr> -</tbody></table> -</p> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_r_v_b_24</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp12_h_r_8</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">neigh_op_bot_0</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_v_b_16</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_r_v_b_35</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp12_h_r_16</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">neigh_op_top_0</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_h_r_0</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">lutff_0/out</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_v_b_0</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">neigh_op_lft_0</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_h_r_8</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">neigh_op_bnr_0</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_v_b_8</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp12_h_r_0</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">sp4_h_r_16</span></td><td><span style="font-family:monospace">local_g0_0</span></td></tr> +</table> <p> Then the signals on the local tracks can be routed to the input pins of the logic cells. Like before, not every local track can be routed to every logic cell input pin. Instead there is a different mix -of 16 local track for each logic cell input. For example for <tt>lutff_0/in_0</tt>: +of 16 local track for each logic cell input. For example for <span style="font-family:monospace">lutff_0/in_0</span>: </p> -<p align="center"> -<table border=""><tbody><tr> -<th style="width:5em"><a name="B.0.26">B0[26]</a></th> -<th style="width:5em"><a name="B.1.26">B1[26]</a></th> -<th style="width:5em"><a name="B.1.27">B1[27]</a></th> -<th style="width:5em"><a name="B.1.28">B1[28]</a></th> -<th style="width:5em"><a name="B.1.29">B1[29]</a></th> +<table class="ctab"> +<tr><th style="width:5em">B0[26]</th><th style="width:5em">B1[26]</th><th style="width:5em">B1[27]</th><th style="width:5em">B1[28]</th><th style="width:5em">B1[29]</th> <th style="width:5em">Function</th><th style="width:15em">Source-Net</th><th style="width:15em">Destination-Net</th></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g0_0</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g2_0</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g1_1</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g3_1</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g0_2</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g2_2</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g1_3</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g3_3</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g0_4</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g2_4</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g1_5</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g3_5</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g0_6</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g2_6</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g1_7</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">buffer</td><td><tt>local_g3_7</tt></td><td><tt>lutff_0/in_0</tt></td></tr> -</tbody></table> -</p> - -<p> -The 8 global nets on the iCE40 can be routed to the local track via the <tt>glb2local_0</tt> to <tt>glb2local_3</tt> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g0_0</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g2_0</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g1_1</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g3_1</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g0_2</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g2_2</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g1_3</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g3_3</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g0_4</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g2_4</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g1_5</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g3_5</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g0_6</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g2_6</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g1_7</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">buffer</td><td><span style="font-family:monospace">local_g3_7</span></td><td><span style="font-family:monospace">lutff_0/in_0</span></td></tr> +</table> + +<p> +The 8 global nets on the iCE40 can be routed to the local track via the <span style="font-family:monospace">glb2local_0</span> to <span style="font-family:monospace">glb2local_3</span> nets using a similar two-stage process. The logic block clock-enable and set-reset inputs can be driven directly from one of 4 global nets or from one of 4 local tracks. The logic block clock input can be driven from any of the global nets and from a few local tracks. See the bitstream documentation for details. @@ -227,97 +225,93 @@ or asynchronous exist for each logic cell individually. </p> <p> -Each LUT <i>i</i> has four input wires <tt>lutff_<i>i</i>/in_0</tt> to <tt>lutff_<i>i</i>/in_3</tt>. Input -<tt>lutff_<i>i</i>/in_3</tt> can be configured to be driven by the carry output of the previous logic cell, -or by <tt>carry_in_mux</tt> in case of <i>i</i>=0. Input <tt>lutff_<i>i</i>/in_2</tt> can be configured to +Each LUT <i>i</i> has four input wires <span style="font-family:monospace">lutff_<i>i</i>/in_0</span> to <span style="font-family:monospace">lutff_<i>i</i>/in_3</span>. Input +<span style="font-family:monospace">lutff_<i>i</i>/in_3</span> can be configured to be driven by the carry output of the previous logic cell, +or by <span style="font-family:monospace">carry_in_mux</span> in case of <i>i</i>=0. Input <span style="font-family:monospace">lutff_<i>i</i>/in_2</span> can be configured to be driven by the output of the previous LUT for <i>i</i>>0. The LUT uses its 4 input signals to -calculate <tt>lutff_<i>i</i>/out</tt>. +calculate <span style="font-family:monospace">lutff_<i>i</i>/out</span>. </p> <p> -The carry unit calculates <tt>lutff_<i>i</i>/cout</tt> = <tt>lutff_<i>i</i>/in_1</tt> + <tt>lutff_<i>i</i>/in_2</tt> + <tt>lutff_<i>(i-1)</i>/cout</tt> > 1</tt>. In case of <i>i</i>=0, <tt>carry_in_mux</tt> is used as third input. <tt>carry_in_mux</tt> can be configured to be constant 0, 1 or the <tt>lutff_7/cout</tt> signal from the logic tile below. +The carry unit calculates <span style="font-family:monospace">lutff_<i>i</i>/cout</span> = <span style="font-family:monospace">lutff_<i>i</i>/in_1</span> + <span style="font-family:monospace">lutff_<i>i</i>/in_2</span> + <span style="font-family:monospace">lutff_<i>(i-1)</i>/cout</span> > 1. In case of <i>i</i>=0, <span style="font-family:monospace">carry_in_mux</span> is used as third input. <span style="font-family:monospace">carry_in_mux</span> can be configured to be constant 0, 1 or the <span style="font-family:monospace">lutff_7/cout</span> signal from the logic tile below. </p> <p> Part of the functionality described above is documented as part of the routing -bitstream documentation (see the buffers for <tt>lutff_</tt> inputs). The <tt>NegClk</tt> -bit switches all 8 FFs in the tile to negative edge mode. The <tt>CarryInSet</tt> -bit drives the <tt>carry_in_mux</tt> high (it defaults to low when not driven via the buffer from -<tt>carry_in</tt>). +bitstream documentation (see the buffers for <span style="font-family:monospace">lutff_</span> inputs). The <span style="font-family:monospace">NegClk</span> +bit switches all 8 FFs in the tile to negative edge mode. The <span style="font-family:monospace">CarryInSet</span> +bit drives the <span style="font-family:monospace">carry_in_mux</span> high (it defaults to low when not driven via the buffer from +<span style="font-family:monospace">carry_in</span>). </p> <p> -The remaining functions of the logic cell are configured via the <tt>LC_<i>i</i></tt> bits. This +The remaining functions of the logic cell are configured via the <span style="font-family:monospace">LC_<i>i</i></span> bits. This are 20 bit per logic cell. We have arbitrarily labeled those bits as follows: </p> -<p align="center"> -<table cellpadding="3" border> +<table class="ctab"> <tr><th>Label</th><th>LC_0</th><th>LC_1</th><th>LC_2</th><th>LC_3</th><th>LC_4</th><th>LC_5</th><th>LC_6</th><th>LC_7</th></tr> -<tr><td>LC_<i>i</i>[0]</tt></td><td>B0[36]</td><td>B2[36]</td><td>B4[36]</td><td>B6[36]</td><td>B8[36]</td><td>B10[36]</td><td>B12[36]</td><td>B14[36]</td></tr> -<tr><td>LC_<i>i</i>[1]</tt></td><td>B0[37]</td><td>B2[37]</td><td>B4[37]</td><td>B6[37]</td><td>B8[37]</td><td>B10[37]</td><td>B12[37]</td><td>B14[37]</td></tr> -<tr><td>LC_<i>i</i>[2]</tt></td><td>B0[38]</td><td>B2[38]</td><td>B4[38]</td><td>B6[38]</td><td>B8[38]</td><td>B10[38]</td><td>B12[38]</td><td>B14[38]</td></tr> -<tr><td>LC_<i>i</i>[3]</tt></td><td>B0[39]</td><td>B2[39]</td><td>B4[39]</td><td>B6[39]</td><td>B8[39]</td><td>B10[39]</td><td>B12[39]</td><td>B14[39]</td></tr> -<tr><td>LC_<i>i</i>[4]</tt></td><td>B0[40]</td><td>B2[40]</td><td>B4[40]</td><td>B6[40]</td><td>B8[40]</td><td>B10[40]</td><td>B12[40]</td><td>B14[40]</td></tr> -<tr><td>LC_<i>i</i>[5]</tt></td><td>B0[41]</td><td>B2[41]</td><td>B4[41]</td><td>B6[41]</td><td>B8[41]</td><td>B10[41]</td><td>B12[41]</td><td>B14[41]</td></tr> -<tr><td>LC_<i>i</i>[6]</tt></td><td>B0[42]</td><td>B2[42]</td><td>B4[42]</td><td>B6[42]</td><td>B8[42]</td><td>B10[42]</td><td>B12[42]</td><td>B14[42]</td></tr> -<tr><td>LC_<i>i</i>[7]</tt></td><td>B0[43]</td><td>B2[43]</td><td>B4[43]</td><td>B6[43]</td><td>B8[43]</td><td>B10[43]</td><td>B12[43]</td><td>B14[43]</td></tr> -<tr><td>LC_<i>i</i>[8]</tt></td><td>B0[44]</td><td>B2[44]</td><td>B4[44]</td><td>B6[44]</td><td>B8[44]</td><td>B10[44]</td><td>B12[44]</td><td>B14[44]</td></tr> -<tr><td>LC_<i>i</i>[9]</tt></td><td>B0[45]</td><td>B2[45]</td><td>B4[45]</td><td>B6[45]</td><td>B8[45]</td><td>B10[45]</td><td>B12[45]</td><td>B14[45]</td></tr> -<tr><td>LC_<i>i</i>[10]</tt></td><td>B1[36]</td><td>B3[36]</td><td>B5[36]</td><td>B7[36]</td><td>B9[36]</td><td>B11[36]</td><td>B13[36]</td><td>B15[36]</td></tr> -<tr><td>LC_<i>i</i>[11]</tt></td><td>B1[37]</td><td>B3[37]</td><td>B5[37]</td><td>B7[37]</td><td>B9[37]</td><td>B11[37]</td><td>B13[37]</td><td>B15[37]</td></tr> -<tr><td>LC_<i>i</i>[12]</tt></td><td>B1[38]</td><td>B3[38]</td><td>B5[38]</td><td>B7[38]</td><td>B9[38]</td><td>B11[38]</td><td>B13[38]</td><td>B15[38]</td></tr> -<tr><td>LC_<i>i</i>[13]</tt></td><td>B1[39]</td><td>B3[39]</td><td>B5[39]</td><td>B7[39]</td><td>B9[39]</td><td>B11[39]</td><td>B13[39]</td><td>B15[39]</td></tr> -<tr><td>LC_<i>i</i>[14]</tt></td><td>B1[40]</td><td>B3[40]</td><td>B5[40]</td><td>B7[40]</td><td>B9[40]</td><td>B11[40]</td><td>B13[40]</td><td>B15[40]</td></tr> -<tr><td>LC_<i>i</i>[15]</tt></td><td>B1[41]</td><td>B3[41]</td><td>B5[41]</td><td>B7[41]</td><td>B9[41]</td><td>B11[41]</td><td>B13[41]</td><td>B15[41]</td></tr> -<tr><td>LC_<i>i</i>[16]</tt></td><td>B1[42]</td><td>B3[42]</td><td>B5[42]</td><td>B7[42]</td><td>B9[42]</td><td>B11[42]</td><td>B13[42]</td><td>B15[42]</td></tr> -<tr><td>LC_<i>i</i>[17]</tt></td><td>B1[43]</td><td>B3[43]</td><td>B5[43]</td><td>B7[43]</td><td>B9[43]</td><td>B11[43]</td><td>B13[43]</td><td>B15[43]</td></tr> -<tr><td>LC_<i>i</i>[18]</tt></td><td>B1[44]</td><td>B3[44]</td><td>B5[44]</td><td>B7[44]</td><td>B9[44]</td><td>B11[44]</td><td>B13[44]</td><td>B15[44]</td></tr> -<tr><td>LC_<i>i</i>[19]</tt></td><td>B1[45]</td><td>B3[45]</td><td>B5[45]</td><td>B7[45]</td><td>B9[45]</td><td>B11[45]</td><td>B13[45]</td><td>B15[45]</td></tr> +<tr><td>LC_<i>i</i>[0]</td><td>B0[36]</td><td>B2[36]</td><td>B4[36]</td><td>B6[36]</td><td>B8[36]</td><td>B10[36]</td><td>B12[36]</td><td>B14[36]</td></tr> +<tr><td>LC_<i>i</i>[1]</td><td>B0[37]</td><td>B2[37]</td><td>B4[37]</td><td>B6[37]</td><td>B8[37]</td><td>B10[37]</td><td>B12[37]</td><td>B14[37]</td></tr> +<tr><td>LC_<i>i</i>[2]</td><td>B0[38]</td><td>B2[38]</td><td>B4[38]</td><td>B6[38]</td><td>B8[38]</td><td>B10[38]</td><td>B12[38]</td><td>B14[38]</td></tr> +<tr><td>LC_<i>i</i>[3]</td><td>B0[39]</td><td>B2[39]</td><td>B4[39]</td><td>B6[39]</td><td>B8[39]</td><td>B10[39]</td><td>B12[39]</td><td>B14[39]</td></tr> +<tr><td>LC_<i>i</i>[4]</td><td>B0[40]</td><td>B2[40]</td><td>B4[40]</td><td>B6[40]</td><td>B8[40]</td><td>B10[40]</td><td>B12[40]</td><td>B14[40]</td></tr> +<tr><td>LC_<i>i</i>[5]</td><td>B0[41]</td><td>B2[41]</td><td>B4[41]</td><td>B6[41]</td><td>B8[41]</td><td>B10[41]</td><td>B12[41]</td><td>B14[41]</td></tr> +<tr><td>LC_<i>i</i>[6]</td><td>B0[42]</td><td>B2[42]</td><td>B4[42]</td><td>B6[42]</td><td>B8[42]</td><td>B10[42]</td><td>B12[42]</td><td>B14[42]</td></tr> +<tr><td>LC_<i>i</i>[7]</td><td>B0[43]</td><td>B2[43]</td><td>B4[43]</td><td>B6[43]</td><td>B8[43]</td><td>B10[43]</td><td>B12[43]</td><td>B14[43]</td></tr> +<tr><td>LC_<i>i</i>[8]</td><td>B0[44]</td><td>B2[44]</td><td>B4[44]</td><td>B6[44]</td><td>B8[44]</td><td>B10[44]</td><td>B12[44]</td><td>B14[44]</td></tr> +<tr><td>LC_<i>i</i>[9]</td><td>B0[45]</td><td>B2[45]</td><td>B4[45]</td><td>B6[45]</td><td>B8[45]</td><td>B10[45]</td><td>B12[45]</td><td>B14[45]</td></tr> +<tr><td>LC_<i>i</i>[10]</td><td>B1[36]</td><td>B3[36]</td><td>B5[36]</td><td>B7[36]</td><td>B9[36]</td><td>B11[36]</td><td>B13[36]</td><td>B15[36]</td></tr> +<tr><td>LC_<i>i</i>[11]</td><td>B1[37]</td><td>B3[37]</td><td>B5[37]</td><td>B7[37]</td><td>B9[37]</td><td>B11[37]</td><td>B13[37]</td><td>B15[37]</td></tr> +<tr><td>LC_<i>i</i>[12]</td><td>B1[38]</td><td>B3[38]</td><td>B5[38]</td><td>B7[38]</td><td>B9[38]</td><td>B11[38]</td><td>B13[38]</td><td>B15[38]</td></tr> +<tr><td>LC_<i>i</i>[13]</td><td>B1[39]</td><td>B3[39]</td><td>B5[39]</td><td>B7[39]</td><td>B9[39]</td><td>B11[39]</td><td>B13[39]</td><td>B15[39]</td></tr> +<tr><td>LC_<i>i</i>[14]</td><td>B1[40]</td><td>B3[40]</td><td>B5[40]</td><td>B7[40]</td><td>B9[40]</td><td>B11[40]</td><td>B13[40]</td><td>B15[40]</td></tr> +<tr><td>LC_<i>i</i>[15]</td><td>B1[41]</td><td>B3[41]</td><td>B5[41]</td><td>B7[41]</td><td>B9[41]</td><td>B11[41]</td><td>B13[41]</td><td>B15[41]</td></tr> +<tr><td>LC_<i>i</i>[16]</td><td>B1[42]</td><td>B3[42]</td><td>B5[42]</td><td>B7[42]</td><td>B9[42]</td><td>B11[42]</td><td>B13[42]</td><td>B15[42]</td></tr> +<tr><td>LC_<i>i</i>[17]</td><td>B1[43]</td><td>B3[43]</td><td>B5[43]</td><td>B7[43]</td><td>B9[43]</td><td>B11[43]</td><td>B13[43]</td><td>B15[43]</td></tr> +<tr><td>LC_<i>i</i>[18]</td><td>B1[44]</td><td>B3[44]</td><td>B5[44]</td><td>B7[44]</td><td>B9[44]</td><td>B11[44]</td><td>B13[44]</td><td>B15[44]</td></tr> +<tr><td>LC_<i>i</i>[19]</td><td>B1[45]</td><td>B3[45]</td><td>B5[45]</td><td>B7[45]</td><td>B9[45]</td><td>B11[45]</td><td>B13[45]</td><td>B15[45]</td></tr> </table> -</p> <p> -<tt>LC_<i>i</i>[8]</tt> is the <tt>CarryEnable</tt> bit. This bit must be set if the carry logic is used. +<span style="font-family:monospace">LC_<i>i</i>[8]</span> is the <span style="font-family:monospace">CarryEnable</span> bit. This bit must be set if the carry logic is used. </p> <p> -<tt>LC_<i>i</i>[9]</tt> is the <tt>DffEnable</tt> bit. It enables the output flip-flop for the LUT. +<span style="font-family:monospace">LC_<i>i</i>[9]</span> is the <span style="font-family:monospace">DffEnable</span> bit. It enables the output flip-flop for the LUT. </p> <p> -<tt>LC_<i>i</i>[18]</tt> is the <tt>Set_NoReset</tt> bit. When this bit is set then the set/reset signal will set, not reset the flip-flop. +<span style="font-family:monospace">LC_<i>i</i>[18]</span> is the <span style="font-family:monospace">Set_NoReset</span> bit. When this bit is set then the set/reset signal will set, not reset the flip-flop. </p> <p> -<tt>LC_<i>i</i>[19]</tt> is the <tt>AsyncSetReset</tt> bit. When this bit is set then the set/reset signal is asynchronous to the clock. +<span style="font-family:monospace">LC_<i>i</i>[19]</span> is the <span style="font-family:monospace">AsyncSetReset</span> bit. When this bit is set then the set/reset signal is asynchronous to the clock. </p> <p> The LUT implements the following truth table: </p> -<p align="center"> -<table cellpadding="3" border> +<table class="ctab"> <tr><th>in_3</th><th>in_2</th><th>in_1</th><th>in_0</th><th>out</th></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">0</td><td><tt>LC_<i>i</i>[4]</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td><tt>LC_<i>i</i>[14]</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">0</td><td><tt>LC_<i>i</i>[15]</tt></td></tr> -<tr><td align="center">0</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td><tt>LC_<i>i</i>[5]</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">0</td><td><tt>LC_<i>i</i>[6]</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td><tt>LC_<i>i</i>[16]</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">0</td><td><tt>LC_<i>i</i>[17]</tt></td></tr> -<tr><td align="center">0</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td><tt>LC_<i>i</i>[7]</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">0</td><td><tt>LC_<i>i</i>[3]</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">0</td><td align="center">1</td><td><tt>LC_<i>i</i>[13]</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">0</td><td><tt>LC_<i>i</i>[12]</tt></td></tr> -<tr><td align="center">1</td><td align="center">0</td><td align="center">1</td><td align="center">1</td><td><tt>LC_<i>i</i>[2]</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">0</td><td><tt>LC_<i>i</i>[1]</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">0</td><td align="center">1</td><td><tt>LC_<i>i</i>[11]</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">0</td><td><tt>LC_<i>i</i>[10]</tt></td></tr> -<tr><td align="center">1</td><td align="center">1</td><td align="center">1</td><td align="center">1</td><td><tt>LC_<i>i</i>[0]</tt></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[4]</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[14]</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[15]</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[5]</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[6]</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[16]</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[17]</span></td></tr> +<tr><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[7]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[3]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[13]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[12]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[2]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[1]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[11]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">0</td><td><span style="font-family:monospace">LC_<i>i</i>[10]</span></td></tr> +<tr><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td style="text-align:center">1</td><td><span style="font-family:monospace">LC_<i>i</i>[0]</span></td></tr> </table> -</p> <p> LUT inputs that are not connected to anything are driven low. The set/reset @@ -325,3 +319,4 @@ signal is also driven low if not connected to any other driver, and the clock enable signal is driven high when left unconnected. </p> +</body></html> |