I'm doing a project involving the ATMEGA128 and external ram and it is about this last bit that I post. The XRAM interface on the 128 has /WR and /RD control lines whereas all SRAM I have come across had /OE and /WE control lines. Conversions between the two are pretty simple with some external logic, but space is critical and external logic would really not be too good. I have seen some circuits where the /RD and /WR pins are directly connected to /OE and /WE but I just can't see how this would work.
Does anyone have information on RAM with the /RD /WR control, or is there some way around this?