Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
241
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
14.2.57 LNKCON2
Type:
CFG
PortID:
N/A
Bus:
0
Device:
0Function:0 (DMI2 Mode)
Offset:
0x1c0
Bus:
0
Device:
0Function:0 (PCIe* Mode)
Bus:
0
Device:
2Function:0-3
Bus:
0
Device:
3Function:0-3
Offset:
0xc0
Bit
Attr
Default
Description
15:12
12:12 (Device 0 
Function 0)
RWS
0x0
compliance_de_emphasis:
For 8GT/s Data Rate:
This bit sets the Transmitter Preset level in Polling.Compliance 
state if the entry occurred due to the Enter Compliance bit 
being 1b. The Encodings are defined as follows:
0000b: -6 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 dB for preshoot
0110b: 0 dB for deemphasis, 2.5 dB for preshoot
0111b: -6 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 5GT/s Data Rate:
This bit sets the deemphasis level in Polling.Compliance state 
if the entry occurred due to the Enter Compliance bit being 
1b. Encodings:
0001b: -3.5 dB
0000b: -6 dB
For 2.5GT/s Data Rate:
The setting of this field has no effect. Components that 
support only 2.5 GT/s speed are permitted to hardwire this 
field to 0h.
Notes:
This bit is intended for debug, compliance testing purposes. 
System firmware and software is allowed to modify this bit 
only during debug or compliance testing.
11:11
RWS
0x0
compliance_sos:
When set to 1b, the LTSSM is required to send SKP Ordered 
Sets periodically in between the (modified) compliance 
patterns.
10:10
RWS
0x0
enter_modified_compliance:
When this bit is set to 1b, the device transmits Modified 
Compliance Pattern if the LTSSM enters Polling.Compliance 
substate.
9:7
RWS_V
0x0
transmit_margin:
This field controls the value of the nondeemphasized voltage 
level at the Transmitter pins.
downloadlike
ArtboardArtboardArtboard
Report Bug