• We recently switched our forum platform. If you experience any issues please email support@crystalfontz.com

CFA635 USB used in 232 TTL


New member
First good job ! order date on 02/22, delivery date 02/26 in France !

my ref DB635ALTMFK

can I use IO pin to drive a 635 with RS232 TTL 5V RX / TX ?

Looking for additional LCD resources? Check out our LCD blog for the latest developments in LCD technology.
USB LCD Displays - Graphic and Character LCDs with a Keypad

CF Tech

There is special firmware to expose the Rx and Tx lines on H1 of the CFA-635. Is the module you have a -KU or a -KS?

CF Tech

There is no way to do it yourself. Unfortunately, the serial version needs to be ordered originally as a serial, there is no way to convert from the USB to serial by the user.

Please write support@crystalfontz.com (refer to this thread) and they will let you know the shipment options.