S-93A46A SII [Seiko Instruments Inc], S-93A46A Datasheet - Page 14

• Manufacturer Part Number: S-93A46A
• Description: CMOS SERIAL E2PROM
• Manufacturer: SII [Seiko Instruments Inc]

14
CMOS SERIAL E
S-93A46A/56A/66A
4.4 Writing to Chip (WRAL)
CS
SK
DO
DI
To write the same 16-bit data to the entire memory address space, change CS to high, and then input
the WRAL instruction, an address, and 16-bit data following the start bit. Any address can be input.
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 been input, the clock pulse monitoring circuit
cancels the WRAL instruction. For details of the clock pulse monitoring circuit, refer to “ Function to
Protect Against Write due to Erroneous Instruction Recognition ”.
CS
SK
DO
DI
<1>
1
<1>
2
2
0
1
PROM
0
2
0
3
0
0
Hi-Z
4
3
0
Figure 11 Chip Write Timing (S-93A56A/66A)
1
4
Hi-Z
5
Figure 10 Chip Write Timing (S-93A46A)
1
5
6
Seiko Instruments Inc.
7
6
6Xs
8
7
4Xs
8
9
10
9
D15
11
10
D15
12
25
D0
27
t
D0
SV
t
CDS
t
SV
t
t
PR
CDS
t
PR
Verify
busy
Verify
busy
ready
Standby
ready
Rev.2.1
Hi-Z
Standby
t
HZ1
Hi-Z
t
HZ1
_00