HN58X24512FPI Hitachi Semiconductor, HN58X24512FPI Datasheet - Page 16

• Manufacturer Part Number: HN58X24512FPI
• Description: Two-wire serial interface 512k EEPROM (64-kword 8-bit)
• Manufacturer: Hitachi Semiconductor

HN58X24512I
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 2
8-bit 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.
acknowledgment) and a following stop condition, the EEPROM stops the random read operation and
returns to a standby state.
Random Read Operation
16
Notes: 1. 2nd device address code (#) should be same as 1st (@).
Start
2. Don't care bit.
1 0 1 0 0
Device
address
@@
W
R/W
1st Memory
address (n)
ACK
Dummy write
ACK
2nd Memory
address (n)
After receiving acknowledgment “1”(no
ACK
1 0 1 0 0
Start
Device
address
R/W
ACK
Currect address read
# #
R
Read data (n)
No ACK
Stop