HN58X2402 Datasheet, PDF (12/21 Pages) Hitachi Semiconductor – Two-wire serial interface 2k / 4k / 8k / 16k / 32k / 64k EEPROM(8-kword x 8-bit)

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
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