S24CS02A datasheet(14/47 Pages) SII

14 / 47 page

2-WIRE CMOS SERIAL E2PROM

S-24CS01A/02A/04A/08A

Rev.4.4_00

Seiko Instruments Inc.

6. 2 Page Write

The page write mode allows up to 8 bytes to be written in a single write operation in the S-24CS01A/02A

and 16 bytes to be written in a single write operation in the S-24CS04A/08A.

Basic data transmission procedure is the same as that in the "Byte Write". But instead of generating a

stop condition, the master transmits 8-bit write data up to 8 bytes before the page write.

When the E

2PROM 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 E

2PROM receives an 8-bit word

address, and responds with an acknowledge. After the E

2PROM 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 E

2PROM repeats reception of 8-bit write data and generation of acknowledge in

succession. The E

2PROM 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.

DEVICE

ADDRESS

WORD ADDRESS (n)

SDA

LINE

A2 A1 A0

D7 D6 D5 D4 D3 D2 D1 D0

ADR INC

DATA (n)

DATA (n+1)

DATA (n+x)

W7 W6 W5 W4 W3 W2 W1 W0

ADR INC

Remark1. A1 is P1 in the S-24CS08A.

2. A0 is P0 in the S-24CS04A/08A.

3. W7 is optional in the S-24CS01A.

Figure 14 Page Write

In S-24CS01A/02A, the lower 3 bits of the word address are automatically incremented every time when

the E

2PROM receives 8-bit write data. If the size of the write data exceeds 8 bytes, the upper 5 bits of the

word address remain unchanged, and the lower 3 bits are rolled over and previously received data will be

overwritten.

In S-24CS04A, the lower 4 bits of the word address are automatically incremented every time when the

2PROM 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 (P0) remain unchanged, and the lower 4 bits are rolled over and

previously received data will be overwritten.

In S-24CS08A, the lower 4 bits of the word address are automatically incremented every time when the

2PROM 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 and P0) remain unchanged, and the lower 4 bits are rolled over and

previously received data will be overwritten.

S24CS02A 数据表(PDF) 14 Page - Seiko Instruments Inc

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