S93A46A Datasheet, PDF (13/41 Pages) Seiko Instruments Inc – 125C OPERATION 3-WIRE SERIAL

Rev.6.1_00
125°C OPERATION 3-WIRE SERIAL E²PROM FOR AUTOMOTIVE
S-93A46A/56A/66A
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. 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
CS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10
25
DI
<1> 0 1 A5 A4 A3 _A2 A1 A0 D15
D0
DO
High-Z
t_SV
t_HZ1
busy
ready
t_PR
High-Z
Figure 8 Data Write Timing (S-93A46A)
t_CDS
CS
Verify
Standby
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-93A56A
t_SV
t_HZ1
DO
High-Z
A7:S-93A66A
busy
ready
t_PR
High-Z
Figure 9 Data Write Timing (S-93A56A, S-93A66A)
Seiko Instruments Inc.
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