M48T86
Operation
2.1.11
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.
2.1.12
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
t(s) AS
duc DS
Pro t(s) R/W
lete uc tDAS
so rod E
- Ob te P AD0-AD7
tCYC
tASW
tASD
tDSL
tDSH
tCS
tOD
tAS
tAH
uct(s) Obsole Figure 6. Intel bus write mode AC waveform
te Prod ct(s) - AS
le u tDAS
so rod DS
Ob te P R/W
ObsoleE
tCYC
tASW
tASD
tDSL
tDSH
tCS
tAS
tAH
tCH
tDHR
AI01647
tCH
tDW
tDHW
AD0-AD7
AI01648
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