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Old 06-17-2021, 12:53 PM   #1
mmartell
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Join Date: Oct 2013
City & State: Windsor ON
My Country: Canada
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Posts: 3,044
Default CH341a Serial Mode

I'm trying to program a Metra Axxess ASCW, it's a unit that enables you to retain steering wheel controls when installing an after market stereo in your car. The newer units use a micro usb to program this one has four pins, GND RX TX +5v.

My CH341a programmer runs natively at 3.3v. My question is if I bypass the 3.3v regulator will the chip accept the 5v supply and will the TTL signals become 0/5v ?
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