[aprssig] GPS GT-320FW(AS)
Glenn Little WB4UIV
glennmaillist at bellsouth.net
Sun Apr 21 20:32:28 EDT 2013
If the level is TTL, by definition, it is 2.2-5.0V for high and 0-0.8V for low.
LVTTL uses 3.3V as a high.
At 09:06 AM 4/21/2013, you wrote:
>The datasheet indicates it has both TTL level and RS232 level
>depending on which set of pins you use.
>What isn't clear is the TTL voltage level - is it 3.3V TTL? 5V? 3.3V
>but 5V tolerant?
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