S-24C08C Datasheet, PDF (13/33 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

Rev.1.0_00_H
2-WIRE SERIAL E²PROM
S-24C08C (WLP PRODUCT)
6. 2 Page write
The page write mode allows up to 16 bytes to be written in a single write operation in the S-24C08C.
Its basic process to transmit data is as same as byte write, but it operates page write by sequentially receiving
8-bit write data as much data as the page size has.
When the S-24C08C 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. And the S-24C08C receives 8-bit word address and responds with
an acknowledge. After the S-24C08C 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 S-24C08C repeats
reception of 8-bit write data and generation of acknowledge in succession. The S-24C08C 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 A2 P1 P0 0 W7W6W5W4W3W2 W1W0 D7 D6 D5 D4 D3 D2 D1 D0 D7
D0 D7
M
L RA
A
A
A
S
S/C
C
C
C
B
BWK
K
K
K
S
T
O
DATA (n+x) P
D0
A
C
K
Figure 12 Page Write
In the S-24C08C, the lower 4 bits of the word address are automatically incremented every time when the
S-24C08C 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 (P1, P0) remain unchanged, and the lower 4 bits are rolled over and the last 16-byte
data that the S-24C08C received will be overwritten.
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