diff options
Diffstat (limited to 'Projects/AVRISP-MKII/AVRISP.txt')
| -rw-r--r-- | Projects/AVRISP-MKII/AVRISP.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Projects/AVRISP-MKII/AVRISP.txt b/Projects/AVRISP-MKII/AVRISP.txt index ab4472d9c..de08d5f37 100644 --- a/Projects/AVRISP-MKII/AVRISP.txt +++ b/Projects/AVRISP-MKII/AVRISP.txt @@ -262,6 +262,21 @@ * targets lacking an ADC.</i></td> * </tr> * <tr> + * <td>VTARGET_REF_VOLTS</td> + * <td>Makefile CDEFS</td> + * <td>Indicates the programmer AVR's AVCC reference voltage when measuring the target's supply voltage. Note that the supply + * voltage should never exceed the reference voltage on the programmer AVR without some form of protection to prevent damage + * to the ADC. <i>Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.</i></td> + * </tr> + * <tr> + * <td>VTARGET_SCALE_FACTOR</td> + * <td>Makefile CDEFS</td> + * <td>Indicates the target's supply voltage scale factor when applied to the ADC. A simple resistive divider can be used on the + * ADC pin for measuring the target's supply voltage, so that voltages above the programmer AVR's AVCC reference voltage can be + * measured. This should be the reciprocal of the division performed - e.g. if the VTARGET voltage is halved, this should be set + * to 2. <i>Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.</i></td> + * </tr> + * <tr> * <td>LIBUSB_DRIVER_COMPAT</td> * <td>Makefile CDEFS</td> * <td>Define to switch to a non-standard endpoint scheme, breaking compatibility with AVRStudio under Windows but making |