S-93A46BD0A-J8T2U3 Datasheet, PDF (17/39 Pages) Seiko Instruments Inc – Function to protect against write due to erroneous instruction recognition

Rev.1.2_00
FOR AUTOMOTIVE 125°C OPERATION 3-WIRE SERIAL E²PROM
S-93A46B/56B/66B/76B/86B
3. 3 Erasing data (ERASE)
To erase 16-bit data at a specified address, set all 16 bits of the data to "1", change the CS pin to "H", 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 the CS pin goes to "L". 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".
CS
t_CDS
Verify
Standby
SK
1 2 34 5 67 8 9
DI
<1> _{1 1} A5 A4 A3 A2 A1
A0
High-Z
DO
t_SV
busy
ready
t_HZ1
t_PR
High-Z
Figure 8 Data Erase Timing (S-93A46B)
CS
t_CDS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11
DI
<1> 1 1
A6 A5 A4 A3 A2 A1 A0
DO
High-Z
x: S-93A56B
A7: S-93A66B
t_SV
busy
ready
t_HZ1
t_PR
High-Z
Figure 9 Data Erase Timing (S-93A56B/66B)
CS
t_CDS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11 12 13
DI
<1> 1 1
A8 A7 A6 A5 A4 A3 A2 A1 A0
DO
High-Z
x: S-93A76B
A9: S-93A86B
t_SV
busy
ready
t_HZ1
t_PR
High-Z
Figure 10 Data Erase Timing (S-93A76B/86B)
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