Intel E7-8880 v2 CM8063601271810 Manual De Usuario
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CM8063601271810
Integrated I/O (IIO) Configuration Registers
282
Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
14.2.111 LN[8:15]EQ
Lane 8 though Lane 15 Equalization Control
This register is unused when the link is configured at x4 or x8 in the bifurcation
register.
register.
Type:
CFG
PortID:
N/A
Bus:
0
Device:
2Function:0
Bus:
0
Device:
3Function:0
Offset:
0x26c, 0x26e, 0x270, 0x272, 0x274, 0x276, 0x278, 0x27a
Bit
Attr
Default
Description
15:15
RV
-
Reserved.
14:12
RW_O
0x7
dnrxpreset:
Downstream Component Receiver Preset Hint
Receiver Preset Hint for Downstream Component with the following
Receiver Preset Hint for Downstream Component with the following
encoding. The Upstream component must pass on this value in the EQ
TS2’es.
000b: -6 dB
001b: -7 dB
010b: -8 dB
011b: -9 dB
100b: -10 dB
101b: -11 dB
110b: -12 dB
111b: Reserved
For a Downstream Component, this field reflects the latest Receiver Preset
000b: -6 dB
001b: -7 dB
010b: -8 dB
011b: -9 dB
100b: -10 dB
101b: -11 dB
110b: -12 dB
111b: Reserved
For a Downstream Component, this field reflects the latest Receiver Preset
value requested from the Upstream Component on Lane 0. The default value
is 111b.
11:8
RW_O
0x8
dntxpreset:
Downstream Component Transmitter Preset
Transmitter Preset for Downstream Component with the following encoding.
Transmitter Preset for Downstream Component with the following encoding.
The Upstream component must pass on this value in the EQ TS2’es.
0000b: -6.0 dB for deemphasis, 0 dB for preshoot
0001b: -3.5 dB for deemphasis, 0 dB for preshoot
0010b: -4.5 dB for deemphasis, 0 dB for preshoot
0011b: -2.5 dB for deemphasis, 0 dB for preshoot
0100b: 0 dB for deemphasis, 0 dB for preshoot
0101b: 0 dB for deemphasis, 2.0 dB for preshoot
0110b: 0 dB for deemphasis, 2.5 dB for preshoot
0111b: -6.0 dB for deemphasis, 3.5 dB for preshoot
1000b: -3.5 dB for deemphasis, 3.5 dB for preshoot
1001b: 0 dB for deemphasis, 3.5 dB for preshoot
others: reserved
0000b: -6.0 dB for deemphasis, 0 dB for preshoot
0001b: -3.5 dB for deemphasis, 0 dB for preshoot
0010b: -4.5 dB for deemphasis, 0 dB for preshoot
0011b: -2.5 dB for deemphasis, 0 dB for preshoot
0100b: 0 dB for deemphasis, 0 dB for preshoot
0101b: 0 dB for deemphasis, 2.0 dB for preshoot
0110b: 0 dB for deemphasis, 2.5 dB for preshoot
0111b: -6.0 dB for deemphasis, 3.5 dB for preshoot
1000b: -3.5 dB for deemphasis, 3.5 dB for preshoot
1001b: 0 dB for deemphasis, 3.5 dB for preshoot
others: reserved
For a Downstream Component, this field reflects the latest Transmitter
Preset requested from the Upstream Component on Lane N.
Notes:
1) P0, P1, P4, P7, P8 and P9 are used for normal situation.
2) P2, P3, P5 and P6 are used only for validation purpose, such as to run
1) P0, P1, P4, P7, P8 and P9 are used for normal situation.
2) P2, P3, P5 and P6 are used only for validation purpose, such as to run
PCIe* Tx CEM test.
7:7
RV
-
Reserved.