HN58X2402 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HN58X2402

Two-wire serial interface (2k EEPROM 256-word x 8-bit) 4k EEPROM (512-word x 8-bit)

Hitachi -> Renesas Electronics 

HN58X2402/58X2404/58X2408/58X2416/58X2432/58X2464

Write Operations

Byte Write:

A write operation requires an 8-bit device address word with R/W = “0”. Then the EEPROM sends

acknowledgment "0" at the ninth clock cycle. After these, the 2kbit to 16kbit EEPROMs receive 8-bit

memory address word, on the other hand the 32kbit and 64kbit EEPROMs receive 2 sequence 8-bit

memory address words. Upon receipt of this memory address, the EEPROM outputs acknowledgment "0"

and receives a following 8-bit write data. After receipt of write data, the EEPROM outputs

acknowledgment "0". If the EEPROM receives a stop condition, the EEPROM enters an internally-timed

write cycle and terminates receipt of SCL, SDA inputs until completion of the write cycle. The EEPROM

returns to a standby mode after completion of the write cycle.

Byte Write Operation

2k to 16k

Start

Device

address

1010

32k to 64k

Start

Device

address

1010

Memory

address (n)

W

ACK

R/W

1st Memory

address (n)

W

ACK

R/W

Notes: 1. Don‘t care bits for 32k and 64k.

2. Don‘t care bit for 32k.

Write data (n)

ACK

ACK Stop

2nd Memory

address (n)

Write data (n)

ACK

ACK

Stop

12

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