[sdiy] 6402 UART

[Trevor Page]

> As i would still need a 16f84, i was thinking of using
> a 16mhz clock driving the PIC and setting the TMR0
> prescaler to 1:32 and driving the UART trough TMR0.
> Anyone sees any problems with this approach?

No great problems, but it doesn't make any sense. Why use a separate
(and obsolete) UART like the 6402 when you can use just a PIC (or AVR)
with an integral UART? The 16F84 is long obsolete too. 

Use a 16F628. Same package as the '84 but with built-in USART, three
timers, etc. You could easily use a 16F628 clocked at 4MHz (i.e. use a
cheaper 4MHz version). 

The 6402 is only worth looking at if you want to implement a serial
interface using discrete logic or something. 

Trev