HN58X2408/HN58X2416/HN58X2432/HN58X2464FPIAG

Rev.3.00, Dec.21.2004, page 12 of 19

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 8kbit 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

8k to 16k

Device

address

Memory

address (n)

Write data (n)

Device

address

1st Memory

address (n)

2nd Memory

address (n)

Write data (n)

Start

Stop

32k to 64k

10 10

10 10

W

W

Stop

Start

ACK

ACK

ACK

ACK

ACK

R/W

ACK

R/W

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

2. Don‘t care bit for 32k.