S-93A46A Datasheet, PDF (13/34 Pages) Seiko Instruments Inc – CMOS SERIAL E2PROM

Rev.2.1_00
CMOS SERIAL E²PROM
S-93A46A/56A/66A
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”.
tCDS
CS
Verify
Standby
SK
1 2 34 5 67 8 9
DI
DO
<1> 1 1 A5 A4 A3 A2 A1
Hi-Z
A0
tSV
tPR
busy
ready
tHZ1
Hi-Z
Figure 8 Data Erase Timing (S-93A46A)
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-93A56A
A7:S-93A66A
tCDS
Standby
Verify
tSV
tPR
busy
ready
tHZ1
Hi-Z
Figure 9 Data Erase Timing (S-93A56A/66A)
Seiko Instruments Inc.
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