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M34E02 Datasheet(PDF) 17 Page - STMicroelectronics

Part # M34E02
Description  2 Kbit serial presence detect (SPD) EEPROM for double data rate (DDR1 and DDR2) DRAM modules
PDF  34 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M34E02 Datasheet(HTML) 17 Page - STMicroelectronics

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M34E02, M34E02-F
Device operation
Doc ID 10367 Rev 10
17/34
3.8.4
Acknowledge in Read mode
For all Read commands, the device waits, after each byte read, for an acknowledgment
during the 9th bit time. If the bus master does not drive Serial Data (SDA) low during this
time, the device terminates the data transfer and switches to its Standby mode.
Figure 10.
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.
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
Sequential
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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