M87C196KCM87C196KD

M87C196KD DESIGN INFORMATION

M87C196KD Enhancements over the M87C196KC

The M87C196KD is an enhanced pin-for-pin compatible upgrade to the M87C196KC The M87C196KD offers

the same functionality packages and pin-outs as the M87C196KC with twice the on-chip EPROM and register

RAM

1 Doubling the on-chip EPROM to 32 KBytes allows for larger on-chip programs

2 Doubling the on-chip RAM to 1000 bytes allows for faster and more optimized code execution

M87C196KC TO M87C196KD DESIGN

CONSIDERATIONS

Due to the added memory a few memory-specific

functions have been modified on the M87C196KD

1 The AC characteristic RD Low to Address Float

ns on the M87C196KC to 30 ns on the

M87C196KD

2 The memory map is expanded to accommodate

the additional memory Because the added mem-

ory resides in memory locations that were always

external to the M87C196KC M87C196KC code

may have to be modified to run on the

M87C196KD

3 The vertical windowing map is extended to allow

all 1000 bytes of register RAM to be windowed

into the lower register file

4 The M87C196KD has a different autoprogram-

ming algorithm to support 32 KBytes of on-chip

EPROM

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