s-24c32c Seiko Instruments Inc., s-24c32c Datasheet - Page 14

• Manufacturer Part Number: s-24c32c
• Description: 2-wire Serial Eeprom S-24c32c/64c 32k/64k-bit
• Manufacturer: Seiko Instruments Inc.

14
SDA LINE
2-WIRE CMOS SERIAL E
S-24C32C/64C
6. 2 Page Write
The page write mode allows up to 32 bytes to be written in a single write operation in the S-24C32C/64C.
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-24C32C/64C 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-24C32C/64C receives a upper 8-bit word
address, and responds with an acknowledge. Then the S-24C32C/64C receives a lower 8-bit word address, and
responds with an acknowledge. After the S-24C32C/64C 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-24C32C/64C repeats reception of 8-bit write data and generation of acknowledge in
succession. The S-24C32C/64C 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
T
Remark W12 is arbitrary in the S-24C32C.
In the S-24C32C, the lower 5 bits of the word address are automatically incremented every time when the S-
24C32C/64C receives 8-bit write data. If the size of the write data exceeds 32 bytes, the upper 7 bits of the word
address remain unchanged, and the lower 5 bits are rolled over and the last 32-byte data that the S-24C32C
received will be overwritten.
In the S-24C64C, the lower 5 bits of the word address are automatically incremented every time when the S-
24C32C/64C receives 8-bit write data. If the size of the write data exceeds 32 bytes, the upper 8 bits of the word
address remain unchanged, and the lower 5 bits are rolled over and the last 32-byte data that the S-24C64C
received will be overwritten.
M
S
B
1 0 1 0
ADDRESS
DEVICE
A2 A1 A0
S
B
L
W
W
R
R
E
T
0
/
I
C
A
K
2
X
WORD ADDRESS (n)
PROM
X
X
UPPER
W12 W11 W10 W9 W8
Figure 15 Page Write
Seiko Instruments Inc.
A
C
K
W7 W6 W5 W4 W3 W2 W1 W0
WORD ADDRESS (n)
LOWER
C
A
K
D7
DATA (n)
D0
D7
Rev.2.0
DATA (n+x)
_00_H
D0
O
S
P
T