
DS17285/DS17287/DS17485/DS17487/DS17885/DS17887
Real-Time Clocks
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5
Read Timing
tASL
tDDR
PWASH
CS
WR
ALE
RD
AD0–AD7
tASD
PWRWL
tCS
tDHR
tAHL
tCH
tCYC
PWRWH
tASED
IRQ
tIRD
tASD
AD0–AD7
CS, WR, RD
HIGH IMPEDANCE
DON'T CARE
VALID
RECOGNIZED
VALID
VCC
tF
VPF(MAX)
VPF(MIN)
tREC
tR
Power-Up/Power-Down Timing