S-93C46B Datasheet, PDF (16/45 Pages) Seiko Instruments Inc – CMOS SERIAL E2PROM

CMOS SERIAL E²PROM
S-93C46B/56B/66B
Rev.4.3_00
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. If 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
tCDS
Verify
Standby
SK
1 2 34 5 67 8 9
DI
DO
<1> _{1 1} A5 A4 A3 A2 A1
Hi-Z
A0
tSV
t PR
Busy
Ready
tHZ1
Hi-Z
Figure 12 Data Erase Timing (S-93C46B)
CS
SK
DI
DO
1 2 3 4 5 6 7 8 9 10 11
<1> 1 1
A6 A5 A4 A3 A2 A1 A0
Hi-Z
x : S-93C56B
A7: S-93C66B
t CDS
Verify
Standby
tSV
Busy
t PR
Ready
t HZ1
Hi-Z
Figure 13 Data Erase Timing (S-93C56B, S-93C66B)
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Seiko Instruments Inc.