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910GL Datasheet(PDF) 100 Page - Intel Corporation |
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910GL Datasheet(HTML) 100 Page - Intel Corporation |
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100 / 426 page  MCHBAR Registers R 100 Datasheet 5.1.7 C0DCLKDIS—Channel A DRAM Clock Disable MMIO Range: MCHBAR Address Offset: 10Ch Default Value: 00h Access: R/W Size: 8 bits This register can be used to disable the system memory clock signals to each DIMM slot. This can significantly reduce EMI and Power concerns for clocks that go to unpopulated DIMMs. Clocks should be enabled based on whether a slot is populated, and what kind of DIMM is present. Bit Access & Default Description 7:6 Reserved 5 R/W 0b DIMM Clock Gate Enable Pair 5 0 = Tri-state the corresponding clock pair. 1 = Enable the corresponding clock pair. 4 R/W 0b DIMM Clock Gate Enable Pair 4 0 = Tri-state the corresponding clock pair. 1 = Enable the corresponding clock pair. 3 R/W 0b DIMM Clock Gate Enable Pair 3 0 = Tri-state the corresponding clock pair. 1 = Enable the corresponding clock pair. 2 R/W 0b DIMM Clock Gate Enable Pair 2 0 = Tri-state the corresponding clock pair. 1 = Enable the corresponding clock pair. 1 R/W 0b DIMM Clock Gate Enable Pair 1 0 = Tri-state the corresponding clock pair. 1 = Enable the corresponding clock pair. 0 R/W 0b DIMM Clock Gate Enable Pair 0 0 = Tri-state the corresponding clock pair. 1 = Enable the corresponding clock pair. Note: Since there are multiple clock signals assigned to each Rank of a DIMM, it is important to clarify exactly which Rank width field affects which clock signal: Channel Rank Clocks Affected 0 0 or 1 SCLK_A[2:0]/ SCLK_A[2:0]# 0 2 or 3 SCLK_A[5:3]/ SCLK_A[5:3]# 1 0 or 1 SCLK_B[2:0]/ SCLK_B[2:0]# 1 2 or 3 SCLK_B[5:3]/ SCLK_B[5:3]# |
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