hn58x2408stie Renesas Electronics Corporation., hn58x2408stie Datasheet - Page 13

• Manufacturer Part Number: hn58x2408stie
• Description: Two-wire Serial Interface 8k Eeprom 1-kword ?? 8-bit 16k Eeprom 2-kword ?? 8-bit
• Manufacturer: Renesas Electronics Corporation.

HN58X2408SI/HN58X2416SI
Read Operation
There are three read operations: current address read, random read, and sequential read. Read operations are initiated
the same way as write operations with the exception of R/W = “1”.
Current Address Read:
The internal address counter maintains the last address accessed during the last read or write operation, with
incremented by one. Current address read accesses the address kept by the internal address counter. After receiving a
start condition and the device address word(R/W is “1”), the EEPROM outputs the 8-bit current address data from the
most significant bit following acknowledgment “0”. If the EEPROM receives acknowledgment “1” (no
acknowledgment) and a following stop condition, the EEPROM stops the read operation and is turned to a standby
state. In case the EEPROM has accessed the last address of the last page at previous read operation, the current address
will roll over and returns to zero address. In case the EEPROM has accessed the last address of the page at previous
write operation, the current address will roll over within page addressing and returns to the first address in the same
page. The current address is valid while power is on. The current address after power on will be indefinite. The
random read operation described below is necessary to define the memory address.
Current Address Read Operation
Rev.2.01, Jan.21.2005, page 13 of 17
Notes: 1. Don‘t care bit for 16k.
8k to 16k
Start
2. Don‘t care bits for 8k and 16k.
3. Don‘t care bits for 8k and 16k.
1 0 1 0
Device
address
R
R/W
Read data (n+1)
ACK
No ACK
Stop