S-24C02D Datasheet, PDF (15/47 Pages) Seiko Instruments Inc – 2-WIRE SERIAL E2PROM

Rev.3.0_01_U
2-WIRE SERIAL E²PROM
S-24C02D/04D/08D16D
7. 2 Page write
The page write mode allows up to 8 bytes to be written in a single write operation in the S-24C02D.
The page write mode allows up to 16 bytes to be written in a single write operation in the S-24C04D/08D/16D.
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 this IC 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 this IC 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 8-bit write data
corresponding to the next word address, and generates an acknowledge. This IC repeats reception of 8-bit write
data and generation of acknowledge in succession. This IC 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 A1 A0 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 (n + x) P
D0
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 10 Page Write
In the S-24C02D, the lower 3 bits of the word address are automatically incremented every time when the
S-24C02D receives 8-bit write data. If the size of the write data exceeds 8 bytes, the higher 5 bits (W7 to W3) of
the word address remain unchanged, and the lower 3 bits are rolled over and the last 8-byte data that the
S-24C02D received will be overwritten.
In the S-24C04D, the lower 4 bits of the word address are automatically incremented every time when the
S-24C04D receives 8-bit write data. If the size of the write data exceeds 16 bytes, the higher 4 bits (W7 to W4) of
the word address and page address (P0) remain unchanged, and the lower 4 bits are rolled over and the last 16-
byte data that the S-24C04D received will be overwritten.
In the S-24C08D, the lower 4 bits of the word address are automatically incremented every time when the
S-24C08D receives 8-bit write data. If the size of the write data exceeds 16 bytes, the higher 4 bits (W7 to W4) 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-24C08D received will be overwritten.
In the S-24C16D, the lower 4 bits of the word address are automatically incremented every time when the
S-24C16D receives 8-bit write data. If the size of the write data exceeds 16 bytes, the higher 4 bits (W7 to W4) of
the word address and page address (P2, P1, P0) remain unchanged, and the lower 4 bits are rolled over and the
last 16-byte data that the S-24C16D received will be overwritten.
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