Hello,
I'm starting a simple 8051 single board and plan on having 64k external RAM and ROM. I'll be using 2x32k chips for each. I'm fairly new to this and would like to know if I have the logic for the chip selects correct.
I plan on using a 2-to-4 decoder using the PSEN line and A15. With this I'd have the 00 line to RAM1, 01 line to RAM2, 10 to ROM1 and 11 to ROM2.
Is this correct?
Thanks,
RogerR
I'm starting a simple 8051 single board and plan on having 64k external RAM and ROM. I'll be using 2x32k chips for each. I'm fairly new to this and would like to know if I have the logic for the chip selects correct.
I plan on using a 2-to-4 decoder using the PSEN line and A15. With this I'd have the 00 line to RAM1, 01 line to RAM2, 10 to ROM1 and 11 to ROM2.
Is this correct?
Thanks,
RogerR