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M34E02 Datasheet(PDF) 6 Page - STMicroelectronics

Part # M34E02
Description  2 Kbit Serial IC Bus EEPROM Serial Presence Detect for DDR2 DIMMs
PDF  23 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M34E02 Datasheet(HTML) 6 Page - STMicroelectronics

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Figure 5. I2C Bus Protocol
Table 2. Device Select Code
Note: 1. The most significant bit, b7, is sent first.
2. E0, E1 and E2 are compared against the respective external pins on the memory device.
Chip Enable Signals
Device Type Identifier
Chip Enable Bits
RW
b7 1
b6
b5
b4
b3
b2
b1
b0
Memory Area Select Code
(two arrays) 2
E2
E1
E0
1
0
1
0
E2
E1
E0
RW
Set Write Protection (SWP)
VSS
VSS
VHV
01
10
0010
Clear Write Protection (CWP)
VSS
VCC
VHV
0110
Permanently Set Write
Protection (PSWP) 2
E2
E1
E0
E2
E1
E0
0
Read SWP
VSS
VSS
VHV
0011
Read CWP
VSS
VCC
VHV
0111
Read PSWP 2
E2
E1
E0
E2
E1
E0
1
SCL
SDA
SCL
SDA
SDA
START
Condition
SDA
Input
SDA
Change
AI00792B
STOP
Condition
1
23
7
89
MSB
ACK
START
Condition
SCL
1
23
7
89
MSB
ACK
STOP
Condition



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