s-93c46b Seiko Instruments Inc., s-93c46b Datasheet - Page 15

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

Rev.4.3
4. 2 Writing data (WRITE)
_00
CS
SK
DO
DI
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 “
Erroneous Instruction Recognition ”.
CS
SK
DO
DI
<1>
1
<1>
0
1
2
1
0
2
3
Figure 11 Data Write Timing (S-93C56B, S-93C66B)
1
4
3
A5
A6
Hi-Z
4
5
Figure 10 Data Write Timing (S-93C46B)
A7: S-93C66B
x : S-93C56B
A4
A5
5
6
Seiko Instruments Inc.
A3
A4
7
Hi-Z
6
A2
A3
7
8
A1
A2
8
9
A0
A1
10
9
D15
A0
11
10
Function to Protect Against Write due to
D15
12
25
D0
t
27
D0
SV
t
CDS
CMOS SERIAL E
t
t
SV
t
PR
CDS
S-93C46B/56B/66B
t
PR
Verify
Busy
Verify
Busy
Ready
R eady
Standby
2
Hi-Z
PROM
t
HZ1
Standby
Hi-Z
t
15
HZ1