s-93c46b Seiko Instruments Inc., s-93c46b Datasheet - Page 17

• Manufacturer Part Number: s-93c46b
• Description: Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

Rev.4.3
4. 4 Writing to chip (WRAL)
_00
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. If the clocks more than the specified number have 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 ”.
DO
CS
SK
DI
<1>
1
<1>
1
2
0
2
0
0
3
0
3
0
Figure 15 Chip Write Timing (S-93C56B, S-93C66B)
0
Hi-Z
4
Hi-Z
4
1
5
Figure 14 Chip Write Timing (S-93C46B)
1
5
6
Seiko Instruments Inc.
6
7
7
6Xs
8
4Xs
8
9
9
10
D15
10
11
D15
12
25
D0
t
SV
t
CDS
27
D0
t
CMOS SERIAL E
PR
t
SV
t
CDS
B usy
Verify
S-93C46B/56B/66B
t
PR
R eady
Verify
B usy
Standby
Hi-Z
R eady
t
2
HZ1
PROM
Standby
Hi-Z
t
HZ1
17