Datasheet

Intel® Xeon® Processor D-1500 Product Family and System Clocks
48 Intel® Xeon® Processor D-1500 Product Family
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
17 Enable CLKREQ# for CLKOUT_ PCIE1_P/N — R/W. Enable dynamic control of CLKOUT_
PCIE1_P/N by the mapped CLKREQ#. This register bit may be updated dynamically.
0 = Disable dynamic control of CLKOUT_ PCIE1_P/N (Default)
1 = Enable dynamic control of CLKOUT_ PCIE1_P/N
16 Enable CLKREQ# for CLKOUT_ PCIE0_P/N — R/W. Enable dynamic control of CLKOUT_
PCIE0_P/N by the mapped CLKREQ#. This register bit may be updated dynamically.
0 = Disable dynamic control of CLKOUT_ PCIE0_P/N (Default)
1 = Enable dynamic control of CLKOUT_ PCIE0_P/N
15:12 Reserved
11:8 CLKRQ# Select for CLKOUT_ITPXDP_P/N — R/W. Select version of external input CLKRQ# for
dynamic control of the output CLKOUT_ITPXDP_P/N.
0000 = PCIECLKRQ0# (GPIO 73) controls CLKOUT_ITPXDP_P/N (Default)
0001 = PCIECLKRQ1# (GPIO 18) controls CLKOUT_ITPXDP_P/N
0010 = PCIECLKRQ2# (GPIO 20) controls CLKOUT_ITPXDP_P/N
0011 = PCIECLKRQ3# (GPIO 25) controls CLKOUT_ITPXDP_P/N
0100 = PCIECLKRQ4# (GPIO 26) controls CLKOUT_ITPXDP_P/N
0101 = PCIECLKRQ5# (GPIO 44) controls CLKOUT_ITPXDP_P/N
0110 = PCIECLKRQ6# (GPIO 45) controls CLKOUT_ITPXDP_P/N
0111 = PCIECLKRQ7# (GPIO 46) controls CLKOUT_ITPXDP_P/N
1000 = PEG_A_CLKRQ# controls CLKOUT_ITPXDP_P/N
1001 = PEG_B_CLKRQ# controls CLKOUT_ITPXDP_P/N
1010 – 1111 = RSVD
7:4 CLKRQ# Select for CLKOUT_PEG_B_P/N — R/W. Select version of external input CLKRQ# for
dynamic control of the output CLKOUT_PEG_B_P/N.
0000 = PCIECLKRQ0# (GPIO 73) controls CLKOUT_PEG_B_P/N
0001 = PCIECLKRQ1# (GPIO 18) controls CLKOUT_PEG_B_P/N
0010 = PCIECLKRQ2# (GPIO 20) controls CLKOUT_PEG_B_P/N
0011 = PCIECLKRQ3# (GPIO 25) controls CLKOUT_PEG_B_P/N
0100 = PCIECLKRQ4# (GPIO 26) controls CLKOUT_PEG_B_P/N
0101 = PCIECLKRQ5# (GPIO 44) controls CLKOUT_PEG_B_P/N
0110 = PCIECLKRQ6# (GPIO 45) controls CLKOUT_PEG_B_P/N
0111 = PCIECLKRQ7# (GPIO 46) controls CLKOUT_PEG_B_P/N
1000 = PEG_A_CLKRQ# controls CLKOUT_PEG_B_P/N
1001 = PEG_B_CLKRQ# controls CLKOUT_PEG_B_P/N (Default)
1010 – 1111 = RSVD
3:0 CLKRQ# Select for CLKOUT_PEG_A_P/N — R/W. Select version of external input CLKRQ# for
dynamic control of the output CLKOUT_PEG_A_P/N.
0000 = PCIECLKRQ0# (GPIO 73) controls CLKOUT_PEG_A_P/N
0001 = PCIECLKRQ1# (GPIO 18) controls CLKOUT_PEG_A_P/N
0010 = PCIECLKRQ2# (GPIO 20) controls CLKOUT_PEG_A_P/N
0011 = PCIECLKRQ3# (GPIO 25) controls CLKOUT_PEG_A_P/N
0100 = PCIECLKRQ4# (GPIO 26) controls CLKOUT_PEG_A_P/N
0101 = PCIECLKRQ5# (GPIO 44) controls CLKOUT_PEG_A_P/N
0110 = PCIECLKRQ6# (GPIO 45) controls CLKOUT_PEG_A_P/N
0111 = PCIECLKRQ7# (GPIO 46) controls CLKOUT_PEG_A_P/N
1000 = PEG_A_CLKRQ# controls CLKOUT_PEG_A_P/N (Default)
1001 = PEG_B_CLKRQ# controls CLKOUT_PEG_A_P/N
1010 – 1111 = RSVD
Bit Description