S-93A46A Datasheet, PDF (12/34 Pages) Seiko Instruments Inc – CMOS SERIAL E2PROM

CMOS SERIAL E²PROM
S-93A46A/56A/66A
Rev.2.1_00
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
25
DI
DO
<1> 0 1 A5 A4 A3 _A2 A1 A0 D15
Hi-Z
D0
t_SV
t_PR
busy
ready
t_HZ1
Hi-Z
Figure 6 Data Write Timing (S-93A46A)
CS
SK
DI
DO
1 2 3 4 5 6 7 8 9 10 11 12
<1> ^{0 1}
A6 A5 A4 A3 A2 A1 A0 D15
Hi-Z
x:S-93A56A
A7:S-93A66
t_CDS
27
Verify
Standby
D0
t_SV
t_PR
busy
ready
t_HZ1
Hi-Z
Figure 7 Data Write Timing (S-93A56A/66A)
12
Seiko Instruments Inc.