12 Jan
2018
12 Jan
'18
11:37 p.m.
Last time I asked these questions I succeeded in hiding them in the middle of a bunch of other text.
On Jan 9, 2018, at 06:26, Richard Wilbur richard.wilbur@gmail.com wrote:
What kind of logic are these GPIO pins? (CMOS, TTL, etc.)
The type of logic determines the input and output voltage and current source and sink characteristics (both capabilities and expectations). Do you have the Allwinner documentation for the A20--specifically for the GPIO pins?
So there are 4 pairs or 8 GPIO lines to test? (I thought we had more lines dedicated to GPIO and two more that were going to be used as I2C for VGA? Are only 8 easy to test?)