2-WIRE CMOS SERIAL E2PROM
S-24CS01A/02A/04A/08A
Rev.4.4_00
6. Write
6. 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, the E2PROM acknowledges it. The E2PROM then receives an 8-bit word
address and responds with an acknowledge. After the E2PROM 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
T
A
R
T
W
R
I
S
T
O
P
DEVICE
T
E
ADDRESS
WORD ADDRESS
DATA
W7 W6 W5 W4 W3 W2 W1 W0
D7 D6 D5 D4 D3 D2 D1 D0
SDA LINE
A2 A1
1
0
1
0
0
A0
A
C
K
M
S
B
L
R A
/ C
W K
A
C
K
S
B
ADR INC
(ADDRESS INCREMENT)
Remark1. A1 is P1 in the S-24CS08A.
2. A0 is P0 in the S-24CS04A/08A.
3. W7 is optional in the S-24CS01A.
Figure 13 Byte Write
13
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
