M48T86
Operation
R/W (READ/WRITE input).
The R/W pin is used to latch data into the M48T86 and provides functionality similar to W in
other memory systems.
Non-volatile RAM
The 114 general-purpose non-volatile RAM bytes are not dedicated to any special function
within the M48T86. They can be used by the processor program as non-volatile memory
and are fully accessible during the update cycle.
Figure 5. Intel bus READ AC waveform
AS
DS
R/W
tDAS
E
AD0-AD7
tASW
tDSL
tCS
tAS
tCYC
tASD
tDSH
tOD
tAH
tCH
tDHR
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Figure 6. Intel bus WRITE mode AC waveform
AS
tDAS
DS
R/W
E
AD0-AD7
tCYC
tASW
tASD
tDSL
tDSH
tCS
tAS
tAH
tDW
tCH
tDHW
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