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| From: | Michael Dreher |
| Subject: | [avrdude-dev] [bug #26703] [Feature Request] Support device reset for 'arduino' programmer type |
| Date: | Wed, 15 Jul 2009 21:00:32 +0000 |
| User-agent: | Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.1) Gecko/20090624 Firefox/3.5 (.NET CLR 3.5.30729) Creative ZENcast v2.01.01 |
Follow-up Comment #1, bug #26703 (project avrdude):
> The RTS output is connected to AVR reset
> via a 100 ohm resistor.
This resistor (R2) is not populated on the Arduino-Duemilanove boards
(checked on a ATmega168 and a ATmega328 Duemilanove board).
The only way to reset a Arduino-Duemilanove board is the following sequence:
1. set DTR (+5V on the FDTI chip) for more than 2ms to discharge C13 (100nF)
via R1 (10kOhm)
2. clear DTR (0V on the FDTI chip) for more than 2ms to bring nRESET of the
ATmega to a 0V level
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