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HN58X2408FPIE View Datasheet(PDF) - Renesas Electronics

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HN58X2408FPIE Datasheet PDF : 22 Pages
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HN58X2408I/HN58X2416I/HN58X2432I/HN58X2464I
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, 2 × 8-bit for 32kbit and 64kbit 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
8k to
16k
Start
32k to
64k
Start
Device
address
@@@
1010
W
Memory
address (n)
ACK
R/W
Dummy write
Device
address
@@@
1010
W
1st Memory
address (n)
ACK
R/W
Dummy write
Device
address
###
1010
R
Read data (n)
Start
ACK
ACK No ACK
R/W
Stop
Currect address read
2nd Memory
address (n)
ACK
Device
address
###
1010
R
Start R/W
ACK
ACK
Read data (n)
No ACK
Stop
Currect address read
Notes: 1. Don‘t care bits for 32k and 64k.
2. Don‘t care bit for 32k.
3. 2nd device address code (#) should be same as 1st (@).
Rev.5.00, Jan.14.2005, page 16 of 20
 

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