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| From: | David A. Mellis |
| Subject: | [avrdude-dev] [patch #7559] 'arduino' programmer type DTR transition fix |
| Date: | Mon, 18 Jul 2011 16:57:14 +0000 |
| User-agent: | Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_8; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1 |
Follow-up Comment #18, patch #7559 (project avrdude):
Those are real full-swing (e.g. +-12V) RS-232 voltages. The voltage levels
are inverted for TTL (0 to 5V) serial, so the data signals are 5V for a logic
1 and 0V for a logic 0 (whereas -12V is a logic 1 for the data signals of
full-swing serial) and the control signals (apparently) become 0V for logic 1
and 5V for logic 0.
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