hn58x24256as Renesas Electronics Corporation., hn58x24256as Datasheet - Page 12

• Manufacturer Part Number: hn58x24256as
• Description: Two-wire Serial Interface 256k Eeprom 32-kword ?? 8-bit
• Manufacturer: Renesas Electronics Corporation.

HN58X24256AS
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 128kbit and 256kbit 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
Rev.0.01, Mar.22.2007, page 12 of 20
Note: 1. Don't care bit
256k
Start
1 0 1 0
Device
address
W
R/W
1st Memory
address (n)
ACK
ACK
2nd Memory
address (n)
ACK
Write data (n)
Stop