STK200 schematics
family such as a 74FHC573 if you go beyond 4 MHz.
You can also program an extra wait state, to use slower memory.
Here you will find a pdf file showing the STK200 schematics:
[Hidden Content]
If you use a 32 KB SRAM, then connect the /CS signal to A15 which give to the range of &H0000 to &H7FFF, if you use a 64 KB SRAM, then
tie /CS to GND, so the RAM is selected all the time.
from : BASCOM AVR (MCS Electronic)