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M34E02 Datasheet(PDF) 21 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) 21 Page - STMicroelectronics

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M34E02, M34E02-F
Use within a DDR1/DDR2 DRAM module
Doc ID 10367 Rev 10
21/34
Figure 11.
Serial presence detect block diagram
1.
E0, E1 and E2 are wired at each DRAM module slot in a binary sequence for a maximum of 8 devices.
2.
Common clock and common data are shared across all the devices.
R = 4.7 k
Ω
AI01937b
DRAM module slot number 7
SDA
SCL
E0
E1
E2
VCC
DRAM module slot number 6
SDA
SCL
E0
E1
E2
DRAM module slot number 5
SDA
SCL
E0
E1
E2
DRAM module slot number 4
SDA
SCL
E0
E1
E2
DRAM module slot number 3
SDA
SCL
E0
E1
E2
DRAM module slot number 2
SDA
SCL
E0
E1
E2
VCC
DRAM module slot number 1
SDA
SCL
E0
E1
E2
DRAM module slot number 0
SDA
SCL
E0
E1
E2
VSS
VSS
VSS
VCC
VSS
VSS VCC
VCC
VSS
VCC
VCC VSS
VSS
VCC
SCL line
SDA line
From the motherboard
I2C master controller



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