Quote:
Originally Posted by x23are
yes. jumper tx to rx on chip and tested it by usb to ttl test program and when i gave 3v3 to pin 4 everything were OK and both tx and rx leds flashed(all level passed) but when i gave 1v8 this is result :
http://s6.picofile.com/file/8202572842/Capture.PNG
i set all setting for serial setup as you said.
no . my adapter don't require DTR & CTS. |
Disconnect the leds.
They are what are ruining the 1v8 interface levels.
You can read a description of that in the write-up of Geekmaster's level shifter.