S-93C46B-H Datasheet, PDF (16/34 Pages) Seiko Instruments Inc – FOR AUTOMOTIVE OPERATION 3-WIRE SERIAL E2PROM

FOR AUTOMOTIVE 105°C OPERATION 3-WIRE SERIAL E²PROM
S-93C46B/56B/66B H Series
Rev.2.1_02
4. 4 Writing to chip (WRAL)
To write the same 16-bit data to the entire memory address space, change CS to high, and then input the
WRAL instruction, an address, and 16-bit data following the start bit. Any address can be input. The write
operation starts when CS goes low. There is no need to set the data to 1 before writing. If the clocks more
than the specified number have been input, the clock pulse monitoring circuit cancels the WRAL instruction.
For details of the clock pulse monitoring circuit, refer to “ Function to Protect Against Write due to
Erroneous Instruction Recognition”.
t_CDS
CS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10
25
DI

0 00
1
DO
High-Z
D15
4Xs
D0
t_SV
t_PR
t_HZ1
busy
ready
High-Z
Figure 12 Chip Write Timing (S-93C46B)
t_CDS
CS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11 12
27
DI
 0 00
1
DO
High-Z
6Xs
D15
D0
t_SV
t_HZ1
busy
ready
t_PR
High-Z
Figure 13 Chip Write Timing (S-93C56B, S-93C66B)
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