S-24C02DI-J8T1U5 Datasheet, PDF (14/47 Pages) Seiko Instruments Inc – Write protect function during low power supply voltage

2-WIRE SERIAL E²PROM
S-24C02D/04D/08D16D
Rev.3.0_01_U
7. Write
7. 1 Byte write
When the master sends a 7-bit device address and a 1-bit read / write instruction code set to "0", following a start
condition, this IC acknowledges it.
This IC then receives an 8-bit word address and responds with an acknowledge. After this IC receives 8-bit write
data and responds with an acknowledge, it receives a stop condition and that initiates the write cycle at the
addressed memory.
During the write cycle all operations are forbidden and no acknowledge is generated.
S
W
T
R
A
I
R
T
DEVICE
ADDRESS
T
E
WORD ADDRESS
S
T
O
DATA
P
SDA LINE
1 0 1 0 _{A2 A1 A0} 0 _{W7 W6 W5 W4 W3 W2 W1 W0 D7 D6 D5 D4 D3 D2 D1 D0}
M
LR A
S
S/ C
B
BW K
A_A
C_C
K_K
A
C
K
Remark A0 is P0 in the S-24C04D/08D/16D.
A1 is P1 in the S-24C08D/16D.
A2 is P2 in the S-24C16D.
Set A0, A1, A2 to "0" in the product with SOT-23-5 package.
Figure 9 Byte Write
14