hn58x24256as Renesas Electronics Corporation., hn58x24256as Datasheet - Page 13

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

HN58X24256AS
Page Write:
The EEPROM is capable of the page write operation which allows any number of bytes up to 64 bytes to
be written in a single write cycle. The page write is the same sequence as the byte write except for
inputting the more write data. The page write is initiated by a start condition, device address word,
memory address(n) and write data (Dn) with every ninth bit acknowledgment. The EEPROM enters the
page write operation if the EEPROM receives more write data (Dn+1) instead of receiving a stop
condition. The a0 to a5 address bits are automatically incremented upon receiving write data (Dn+1). The
EEPROM can continue to receive write data up to 64 bytes. If the a0 to a5 address bits reaches the last
address of the page, the a0 to a5 address bits will roll over to the first address of the same page and
previous write data will be overwritten. Upon receiving a stop condition, the EEPROM stops receiving
write data and enters internally-timed write cycle.
Page Write Operation
Rev.0.01, Mar.22.2007, page 13 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)
Write data (n+m)
ACK
ACK
Stop