S-93C46CD0I-J8T1U3 Datasheet, PDF (16/39 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

3-WIRE SERIAL E²PROM
S-93C46C/56C/66C/76C/86C
Rev.1.1_00
3. 2 Writing data (WRITE)
To write 16-bit data to a specified address, change the CS pin to "H" and then input the WRITE instruction,
address, and 16-bit data following the start bit. The write operation starts when the CS pin goes to "L". There is no
need to set the data to "1" before writing. When 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
Standby
CS
Verify
SK
1 2 3 4 5 6 7 8 9 10
25
DI
<1> 0 1 A5 A4 A3 _A2 A1 A0 D15
D0
t_SV
DO
High-Z
t_HZ1
busy
ready
t_PR
High-Z
Figure 5 Data Write Timing (S-93C46C)
CS
t_CDS
Standby
Verify
SK
1 2 3 4 5 6 7 8 9 10 11 12
27
DI
<1> ^{0 1}
A6 A5 A4 A3 A2 A1 A0 D15
D0
x: S-93C56C
t_SV
t_HZ1
DO
High-Z
A7: S-93C66C
busy
ready
t_PR
High-Z
Figure 6 Data Write Timing (S-93C56C/66C)
tCDS
Standby
CS
Verify
SK
1 2 3 4 5 6 7 8 9 10 11 12 13 14
29
DI
<1> 0 1
A8 A7 A6 A5 A4 A3 A2 A1 A0 D15
D0
DO
High-Z
x: S-93C76C
A9: S-93C86C
t_SV
t_HZ1
busy
ready
tPR
High-Z
Figure 7 Data Write Timing (S-93C76C/86C)
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