S93A86A Datasheet, PDF (13/39 Pages) Seiko Instruments Inc – 125C OPERATION 3-WIRE SERIAL

Rev.6.1_00
125°C OPERATION 3-WIRE SERIAL E²PROM FOR AUTOMOTIVE
S-93A86A
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 11 12 13 14
29
DI
<1> 0 ₁ A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D15
D0
High-Z
DO
t_SV
t_HZ1
busy
ready
t_PR
High-Z
Figure 7 Data Write Timing
4. 3 Erasing data (ERASE)
To erase 16-bit data at a specified address, set all 16 bits of the data to 1, change CS to high, and then input the
ERASE instruction and address following the start bit. There is no need to input data. The data erase operation
starts when CS goes low. When the clocks more than the specified number have been input, the clock pulse
monitoring circuit cancels the ERASE 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 11 12 13
DI
<1> 1 1 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
DO
High-Z
t_SV
busy
ready
t_HZ1
t_PR
High-Z
Figure 8 Data Erase Timing
Seiko Instruments Inc.
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