S-93C46B_1 Datasheet, PDF (14/50 Pages) Seiko Instruments Inc – 3-WIRE SERIAL E2PROM

3-WIRE SERIAL E²PROM
S-93C46B/56B/66B
Rev.7.0_00
4. 2 Writing data (WRITE)
To write 16-bit data to a specified address, change CS to high and then input the WRITE instruction,
address, and 16-bit data following the start bit. 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 WRITE 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
c 0 1 A5 A4 A3 A2 A1 A0 D15
D0
High-Z
DO
t_SV
t_PR
t_HZ1
busy
ready
High-Z
Figure 11 Data Write Timing (S-93C46B)
t_CDS
CS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11 12
27
DI
c01
A6 A5 A4 A3 A2 A1 A0 D15
D0
DO
High-Z
t_SV
t_HZ1
busy
ready
x : S-93C56B
t_PR
High-Z
A7: S-93C66B
Figure 12 Data Write Timing (S-93C56B, S-93C66B)
14
Seiko Instruments Inc.