Rainbow Electronics DS1500 - Manual (Page 5)

DS1500 Y2KC Watchdog RTC with Nonvolatile Control
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Figure 2. Write Cycle Timing, Write-Enable-Controlled
Figure 3. Write Cycle Timing, Chip-Select-Controlled
t
WC
t
AH
t
DS
t
AS
t
WEZ
t
D H
t
WR
t
AS
DATA INPUT DQ0-DQ7
WE
CS
A0-A4
DATA OUTPUT DATA INPUT
t
WEW
VALID VALID
t
W C
t
AH
t
D S
t
AS
t
DH
t
W R
t
AS
DATA INPUT DQ0-DQ7
WE
CS
A0-A4
DATA INPUT
t
CSW
VALID VALID