hn58x2408stie Renesas Electronics Corporation., hn58x2408stie Datasheet - Page 14

• 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
Random Read:
This is a read operation with defined read address. A random read requires a dummy write to set read address. The
EEPROM receives a start condition, device address word(R/W=0) and memory address (8-bit for 8kbit to 16kbit
EEPROMs) sequentially. The EEPROM outputs acknowledgment “0” after receiving memory address then enters a
current address read with receiving a start condition. The EEPROM outputs the read data of the address which was
defined in the dummy write operation. After receiving acknowledgment “1”(no acknowledgment) and a following stop
condition, the EEPROM stops the random read operation and returns to a standby state.
Random Read Operation
Sequential Read:
Sequential reads are initiated by either a current address read or a random read. If the EEPROM receives
acknowledgment “0” after 8-bit read data, the read address is incremented and the next 8-bit read data are coming out.
This operation can be continued as long as the EEPROM receives acknowledgment “0”. The address will roll over and
returns address zero if it reaches the last address of the last page. The sequential read can be continued after roll over.
The sequential read is terminated if the EEPROM receives acknowledgment “1” (no acknowledgment) and a following
stop condition.
Sequential Read Operation
Rev.2.01, Jan.21.2005, page 14 of 17
8k to
16k
Start
Note: 1. 2nd device address code (#) should be same as 1st (@).
8k to
16k
Start
1 0 1 0
Device
address
1 0 1 0
Device
address
R
@@@
R/W
Dummy write
ACK
Read data (n)
W
R/W
Memory
address (n)
ACK
Read data (n+1) Read data (n+2)
ACK
ACK
1 0 1 0
Start
Device
address
# # #
ACK
Currect address read
R
R/W
ACK
ACK
Read data (n)
No ACK
Read data (n+m)
Stop
No ACK
Stop