S-93C46B Datasheet, PDF (15/45 Pages) Seiko Instruments Inc – CMOS SERIAL E2PROM

Rev.4.3_00
CMOS SERIAL E²PROM
S-93C46B/56B/66B
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. If 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”.
CS
t CDS
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
Hi-Z
DO
D0
t SV
tHZ1
Busy
Ready
t PR
Hi-Z
Figure 10 Data Write Timing (S-93C46B)
CS
tCDS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11 12
27
DI
<1> 0 ₁
DO
A6 A5 A4 A3 A2 A1 A0 D15
Hi-Z
x : S-93C56B
A7: S-93C66B
D0
t SV
tHZ1
Busy
R eady
t PR
Hi-Z
Figure 11 Data Write Timing (S-93C56B, S-93C66B)
Seiko Instruments Inc.
15