S-93C46C Datasheet, PDF (18/39 Pages) Seiko Instruments Inc – 3-WIRE SERIAL E2PROM

3-WIRE SERIAL E²PROM
S-93C46C/56C/66C/76C/86C
Rev.1.1_00
3. 4 Writing to chip (WRAL)
To write the same 16-bit data to the entire memory address space, change the CS pin to "H", 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 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 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
<1> ^{0 0 0}
1
DO
High-Z
D15
4xs
D0
t_SV
t_HZ1
busy
ready
t_PR
High-Z
Figure 11 Chip Write Timing (S-93C46C)
t_CDS
Standby
CS
Verify
SK
1 2 3 4 5 6 7 8 9 10 11 12
27
DI
<1> ^{0 0 0}
1
DO
High-Z
D15
D0
6xs
t_SV
t_HZ1
busy
ready
t_PR
High-Z
Figure 12 Chip Write Timing (S-93C56C/66C)
t_CDS
Standby
CS
Verify
SK
1 2 3 4 5 6 7 8 9 10 11 12 13 14
29
DI
<1> 0 0 0 1
DO
High-Z
D15
D0
8xs
t_SV
t_HZ1
busy
ready
t_PR
High-Z
Figure 13 Chip Write Timing (S-93C76C/86C)
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