HN58X24128FPI 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HN58X24128FPI

Two-wire serial interface 128k EEPROM (16-kword × 8-bit) 256k EEPROM (32-kword × 8-bit)

Hitachi -> Renesas Electronics 

HN58X24128I/HN58X24256I

Random Read:

This is a read operation with defined read address. A random read requires a dummy write to set read

address. The EEPROM receives a start condition, device address word (R/W=0) and memory address 2 ×

8-bit sequentially. The EEPROM outputs acknowledgment “0” after receiving memory address then enters

a current address read with receiving a start condition. The EEPROM outputs the read data of the address

which was defined in the dummy write operation. After receiving acknowledgment “1”(no

acknowledgment) and a following stop condition, the EEPROM stops the random read operation and

returns to a standby state.

Random Read Operation

128k to

256k

Start

Device

address

@@@

1010

W

1st Memory

address (n)

ACK

R/W

Dummy write

2nd Memory

address (n)

ACK

Device

address

###

1010

R

Start R/W

ACK

ACK

Read data (n)

No ACK

Stop

Currect address read

Notes: 1. Don't care bits for 128k and 256k.

2. Don't care bit for 128k.

3. 2nd device address code (#) should be same as 1st (@).

16

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