We're designing a circuit with an AT90USB1286 as the main MCU and there's a PS/2 peripheral device which needs to send data to the AT90USB1286.
I guess the AT90USB1286 could bit bang PS/2, but that would be pretty resource consuming and it couldn't do much else so I though that using an intermediate IC, PS/2 could be converted to USART which the AT90USB1286 speaks natively, so it could do any other processing.
I think an ATtiny could do the PS/2 to USART conversion with bit banging. Is there any ASIC that is specifically crafted for this job? If there isn't any other options then which is the cheapest ATtiny that could do the job?
Thanks in advance!