Datasheet
Intel® Xeon® Processor D-1500 Product Family and System Clocks
Intel® Xeon® Processor D-1500 Product Family 45
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
2.5.1.13 PM1PCIECLK—Power Management 1 PCIe Clock Register
Attribute: R/W
Default Value: 76543210h Size: 32-bit
1 CLKRUN Control Enable for fixed 33 MHz Single Ended Clock Output 1 — R/W. Controls the
enabling of support for CLKRUN protocol for fixed 33 MHz clock outputs.
0 = CLKRUN Control is disabled and clock is free running (Default)
1 = CLKRUN Control is enabled and clock output can be turned off
0 CLKRUN Control Enable for fixed 33 MHz Single Ended Clock Output 0 — R/W. Controls the
enabling of support for CLKRUN protocol for fixed 33 MHz clock outputs.
0 = CLKRUN Control is disabled and clock is free running (Default)
1 = CLKRUN Control is enabled and clock output can be turned off
Bit Description
Bit Description
31:28 CLKRQ# Select for CLKOUT_PCIE7_P/N — R/W. Select version of external input CLKRQ# for
dynamic control of the output CLKOUT_PCIE7_P/N.
0000 = PCIECLKRQ0# controls CLKOUT_PCIE7_P/N
0001 = PCIECLKRQ1# controls CLKOUT_PCIE7_P/N
0010 = PCIECLKRQ2# controls CLKOUT_PCIE7_P/N
0011 = PCIECLKRQ3# controls CLKOUT_PCIE7_P/N
0100 = PCIECLKRQ4# controls CLKOUT_PCIE7_P/N
0101 = PCIECLKRQ5# controls CLKOUT_PCIE7_P/N
0110 = PCIECLKRQ6# controls CLKOUT_PCIE7_P/N
0111 = PCIECLKRQ7# controls CLKOUT_PCIE7_P/N (Default)
1000 = PEG_A_CLKRQ# controls CLKOUT_PCIE7_P/N
1001 = PEG_B_CLKRQ# controls CLKOUT_PCIE7_P/N
1010 – 1111 = RSVD
27:24 CLKRQ# Select for CLKOUT_PCIE6_P/N — R/W. Select version of external input CLKRQ# for
dynamic control of the output CLKOUT_PCIE6_P/N.
0000 = PCIECLKRQ0# controls CLKOUT_PCIE6_P/N
0001 = PCIECLKRQ1# controls CLKOUT_PCIE6_P/N
0010 = PCIECLKRQ2# controls CLKOUT_PCIE6_P/N
0011 = PCIECLKRQ3# controls CLKOUT_PCIE6_P/N
0100 = PCIECLKRQ4# controls CLKOUT_PCIE6_P/N
0101 = PCIECLKRQ5# controls CLKOUT_PCIE6_P/N
0110 = PCIECLKRQ6# controls CLKOUT_PCIE6_P/N (Default)
0111 = PCIECLKRQ7# controls CLKOUT_PCIE6_P/N
1000 = PEG_A_CLKRQ# controls CLKOUT_PCIE6_P/N
1001 = PEG_B_CLKRQ# controls CLKOUT_PCIE76_P/N
1010 – 1111 = RSVD
23:20 CLKRQ# Select for CLKOUT_PCIE5_P/N — R/W. Select version of external input CLKRQ# for
dynamic control of the output CLKOUT_PCIE5_P/N.
0000 = PCIECLKRQ0# controls CLKOUT_PCIE5_P/N
0001 = PCIECLKRQ1# controls CLKOUT_PCIE5_P/N
0010 = PCIECLKRQ2# controls CLKOUT_PCIE5_P/N
0011 = PCIECLKRQ3# controls CLKOUT_PCIE5_P/N
0100 = PCIECLKRQ4# controls CLKOUT_PCIE5_P/N
0101 = PCIECLKRQ5# controls CLKOUT_PCIE5_P/N (Default)
0110 = PCIECLKRQ6# controls CLKOUT_PCIE5_P/N
0111 = PCIECLKRQ7# controls CLKOUT_PCIE5_P/N
1000 = PEG_A_CLKRQ# controls CLKOUT_PCIE5_P/N
1001 = PEG_B_CLKRQ# controls CLKOUT_PCIE5_P/N
1010 – 1111 = RSVD