S-24CS16A Datasheet, PDF (15/53 Pages) Seiko Instruments Inc – 2-WIRE CMOS SERIAL E2PROM

Rev.4.3_00
2-WIRE CMOS SERIAL E²PROM
S-24CS16A
6. 2 Page Write
The page write mode allows up to 16 bytes to be written in a single write operation in the S-24CS16A.
Basic data transmission procedure is the same as that in the “Byte Write”. But instead of generating a stop
condition, the master transmitts 8-bit write data up to 8 bytes before the page write.
When the E²PROM receives a 7-bit device address and a 1-bit read / write instruction code set to “0”, following a
start condition, it generates an acknowledge. Then the E²PROM 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 8-bit
write data corresponding to the next word address, and generates an acknowledge. The E²PROM repeats
reception of 8-bit write data and generation of acknowledge in succession. The E²PROM can receive as many write
data as the maximum page size.
Receiving a stop condition initiates a write cycle of the area starting from the designated memory address and
having the page size equal to the received write data.
S
T
A
R DEVICE
T ADDRESS
W
R
I
T
E WORD ADDRESS (n)
DATA (n)
DATA (n+1)
SDA
LINE
1 0 1 0 P2 P1 P0 0 W7W6W5W4W3W2 W1W0 D7 D6 D5 D4 D3 D2 D1 D0 D7
D0 D7
M
LRA
A
A
A
S
S/C
C
C
C
B
BWK
K
K
K
S
T
O
DATA
P
D0
A
C
K
ADR INC
Figure 16 Page Write
ADR INC
ADR INC
In S-24CS16A, the lower 4 bits of the word address are automatically incremented every time when the E²PROM
receives 8-bit write data. If the size of the write data exceeds 16 bytes, the upper 4 bits of the word address and
page address (P2, P1 and P0) remain unchanged, and the lower 4 bits are rolled over and previously received data
will be overwritten.
Seiko Instruments Inc.
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