s-24cs64a Seiko Instruments Inc., s-24cs64a Datasheet - Page 13

• Manufacturer Part Number: s-24cs64a
• Description: 2-wire Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

Rev.4.1
6.2 Page Write
The page write mode allows up to 32 bytes to be written in a single wire operation in the S-24CS64A.
Basic data transmission procedure is the same as that in the “Byte Write”. However, when the E
receives 8-bit write data which corresponds to the page size, the page can be written.
When the E
following a start condition, it generates an acknowledge. Then the E
the word address and responds with an acknowledge. And the E
word address and responds with an acknowledge. After the E
responds with an acknowledge, it receives 8-bit write data corresponding to the next word address, and
generates an acknowledge. The E
acknowledge in succession. The E
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.
The lower 5 bits of the word address are automatically incremented every time when the E
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 previously received data will be
overwritten.
LINE
SDA
_00
S
A
R
T
T
M
S
B
1
0
2
ADDRESS
1
PROM receives a 7-bit device address and a 1-bit read / write instruction code set to “0”,
DEVICE
0
A2 A1 A0
S
B
L
W
W
R
T
E
R
0
I
/
A
C
K
UPPER WORD ADDRESS (n)
X
X
X W1
2
W1 W1 W9
PROM can receive as many write data as the maximum page size.
2
PROM repeats reception of 8-bit write data and generation of
Figure 13 Page Write
Seiko Instruments Inc.
W8
C
A
K
LOWER WORD ADDRESS (n)
W7
W6
W5 W4 W3 W2 W1 W0
A
C
K
2-WIRE CMOS SERIAL E
D7
2
2
PROM receives the lower 8 bits of the
PROM receives 8-bit write data and
2
DATA (n)
PROM receives the upper 8 bits of
ADR INC
D0
A
C
K
D7
DATA (n+x)
S-24CS64A
2
PROM
ADR INC
2
2
D0
PROM
PROM
A
C
K
O
S
T
P
13