HN58X2432SI_05 Datasheet, PDF (12/22 Pages) Renesas Technology Corp – Two-wire serial interface 32k EEPROM (4-kword × 8-bit)/64k EEPROM (8-kword × 8-bit)

HN58X2432SI/HN58X2464SI
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 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
32k to 64k
Start
Device
address
1010
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.
2nd Memory
address (n)
Write data (n)
ACK
ACK
Stop
Rev.2.00, Jan.11.2005, page 12 of 20