s-24c08ci-t8t1u3 Seiko Instruments Inc., s-24c08ci-t8t1u3 Datasheet - Page 16

• Manufacturer Part Number: s-24c08ci-t8t1u3
• Description: 2-wire Serial Eeprom S-24c08c 8k-bit
• Manufacturer: Seiko Instruments Inc.

16
2-WIRE CMOS SERIAL E
S-24C08C
SDA LINE
6. 3 Write Protect
WP
Write protect is available in the S-24C08C. When the WP pin is connected to the V
area is inhibited.
When the WP pin is connected to GND or set in high impedance, the write protect is invalid, and write operation in
all memory area is available.
Fix the level of the WP pin from start condition in the write operation (byte write, page write) until stop condition. If
the WP pin changes during this time, the address data being written at this time is not guaranteed. Regarding the
timing of write protect, refer to Figure 9 .
In not using the write protect, connect the WP pin to GND or set it open. The write protect is valid in the range of
operation power supply voltage.
As seen in Figure 17 when the write protect is valid, the S-24C08C does not generate an acknowledgment signal
after data input.
S
T
A
R
T
M
S
B
1 0 1 0
ADDRESS
DEVICE
A2 P1 P0
2
PROM
L
S
B
W
W
R
R
T
E
0
/
I
A
C
K
Figure 17 Write Protect
W7 W6 W5 W4 W3 W2 W1 W0
Seiko Instruments Inc.
WORD ADDRESS
C
A
K
A
C
K
D7 D6 D5 D4 D3 D2 D1 D0
DATA
CC
, write operation to memory
Rev.2.0
N
A
C
K
O
S
P
T
_00_H