Embedded Systems Design, 2nd Edition

392 Embedded systems design

DRAM is used then with a by 16 organisation, a single chip

would provide 1 Mbyte of data storage which is far too much

for this application. The other potential problem is the effect of

refresh cycles which would potentially introduce sampling

errors. This means that static RAM is probably the best solu-

tion.

To meet the 25 μs cycle time which includes a minimum

of a data read and a data write, this means that the overall

access time must be significantly less than half of the cycle time,

i.e. less than 12.5 μs. This means that almost any memory is

capable of performing this function.

In addition, some form of non-volatile memory ...