Hi everyone,
have anyone use UART protocol using 3 wires: TX,RX and REQ (clock)?
https://dl.dropbox.com/u/13205917/sshot-12.png
May be anyone knows how to make a friendship with AtMega32u4 using that protocol?
If anyone interested what MCU uses it: UPD78054GC.
Is it possible to connect to AVR mcu using MAX232? Thanks!
[Here’s a data sheet for the chip. Looks like REQ can be either a baud rate output or input. Based on the schematic, it is being used as an output. I’d try checking if TXD/RXD are standard ASYNC serial; you won’t hurt anything by trying.
Probing REQ may give a hint for the baud rate.
/mike](http://www.maxim4u.com/view_download.php?id=1700548&file=0351\upd78054gc-xxx-3b9_2787747.pdf)
[Deleted] Didn’t look into the datasheet. REQ is ASCK, or Asynchronous serial clock. Not some sort of “request” flow-control signal. My bad.
