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M24C08-125 Fiches technique(PDF) 17 Page - STMicroelectronics

No de pièce M24C08-125
Description  Automotive 16-Kbit, 8-Kbit, 4-Kbit and 2-Kbit serial I²C bus EEPROM
PDF  30 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M24C08-125 Fiches technique(HTML) 17 Page - STMicroelectronics

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Device operation
Doc ID 022564 Rev 1
17/30
Figure 9.
Read mode sequences
1.
The seven most significant bits of the device select code of a Random Read (in the 1st and 3rd bytes) must
be identical.
3.7
Read operations
Read operations are performed independently of the state of the Write Control (WC) signal.
The device has an internal address counter which is incremented each time a byte is read.
3.7.1
Random Address Read
A dummy Write is first performed to load the address into this address counter (as shown in
Figure 9) but without sending a Stop condition. Then, the bus master sends another Start
condition, and repeats the device select code, with the Read/Write bit (RW) set to 1. The
device acknowledges this, and outputs the contents of the addressed byte. The bus master
must not acknowledge the byte, and terminates the transfer with a Stop condition.
Dev select *
Byte address
Dev select
Data out 1
AI01942b
Data out N
Current
Address
Read
Dev select
Data out
Random
Address
Read
Dev select *
Data out
Sequentila
Current
Read
Data out N
Dev select *
Byte address
Sequential
Random
Read
Dev select *
Data out 1
ACK
R/W
NO ACK
ACK
R/W
ACK
ACK
R/W
ACK
ACK
ACK
NO ACK
R/W
NO ACK
ACK
ACK
R/W
ACK
ACK
R/W
ACK
NO ACK



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