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M34C02 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
MFG CO.
'M34C02' PDF : 26 Pages View PDF
Figure 11. Serial Presence Detect Block Diagram
M34C02
DIMM Position 7
E2 E1 E0 SCL SDA
R = 4.7kΩ
DIMM Position 6
VCC
E2 E1 E0 SCL SDA
DIMM Position 5
VCC
VSS
E2 E1 E0 SCL SDA
DIMM Position 4
VCC VSS VCC
E2 E1 E0 SCL SDA
DIMM Position 3
VCC
VSS
E2 E1 E0 SCL SDA
DIMM Position 2
VSS
VCC
E2 E1 E0 SCL SDA
DIMM Position 1
VSS VCC VSS
E2 E1 E0 SCL SDA
DIMM Position 0
VSS
VCC
E2 E1 E0 SCL SDA
VSS
AI01937
SCL line
SDA line
From the motherboard
I2C master controller
Note: 1. E0, E1 and E2 are wired at each DIMM socket in a binary sequence for a maximum of 8 devices.
2. Common clock and common data are shared across all the devices.
3. Pull-up resistors are required on all SDA and SCL bus lines (typically 4.7 kΩ) because these lines are open drain when used as
outputs.
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