diff options
Diffstat (limited to 'Projects/AVRISP-MKII/AVRISP.txt')
| -rw-r--r-- | Projects/AVRISP-MKII/AVRISP.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Projects/AVRISP-MKII/AVRISP.txt b/Projects/AVRISP-MKII/AVRISP.txt index fddae6d2b..610903110 100644 --- a/Projects/AVRISP-MKII/AVRISP.txt +++ b/Projects/AVRISP-MKII/AVRISP.txt @@ -56,14 +56,15 @@ * Note that this design currently has the following limitations:
* - Minimum ISP target clock speed of 500KHz due to hardware SPI module prescaler limitations
* - No reversed/shorted target connector detection and notification
+ * - Very slow TPI and PDI programming when in software emulated USART mode
*
* On AVR models with an ADC converter, AVCC should be tied to 5V (e.g. VBUS) and the VTARGET_ADC_CHANNEL token should be
* set to an appropriate ADC channel number in the project makefile for VTARGET detection to operate correctly. On models
* without an ADC converter, VTARGET will report a fixed 5V level at all times.
*
* When compiled for the XPLAIN board target, this will automatically configure itself for the correct connections to the
- * XPLAIN's XMEGA AVR, and will enable PDI/TPI only programming support (since ISP mode is not needed). Note that the
- * first revision XPLAIN board lacks a bootloader on the AT90USB1287, and thus for this firmware to be loaded, an external
+ * XPLAIN's XMEGA AVR, and will enable hardware PDI/TPI only programming support (since ISP mode is not needed). Note that
+ * the first revision XPLAIN board lacks a bootloader on the AT90USB1287, and thus for this firmware to be loaded, an external
* programmer will be required.
*
* While this application can be compiled for USB AVRs with as little as 8KB of FLASH, for full functionality 16KB or more
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