參數(shù)資料
型號(hào): GL9714-TGGXX
廠商: Genesys Logic, Inc.
英文描述: PCI ExpressTM PIPE x4 PHY
中文描述: 管x4的PCI ExpressTM物理層
文件頁數(shù): 19/46頁
文件大?。?/td> 527K
代理商: GL9714-TGGXX
GL9714 PCI Express
TM
PIPE x4 PHY
2004-2007 Genesys Logic Inc. - All rights reserved.
Page 19
4.2 Registers Descriptions
Offset 00h – REVID …………………………………………….………… Default value = 8’bxxxx0xxx
REV3
REV2
REV1
REV0
BY1
RCAL0
RCAL1
RCAL2
R
R
R
R
R
R
R
R
7-4 REV[3:0]
Chip revision code
3 BY1
x1 package
2-0 RCAL[0:2]
Calibration result of on-chip termination resistors
Offset 01h – XCVROPT ……………………………………………..…………. Default value = 8’hE9
SW1
SW0
DEM1
DEM0
BW0
BW1
RDEF
FEVAL
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-6 SW[1:0]
Swing control of transmitter output
Output Swing (Differential, peak-to-peak)
00
0.6V
01
0.8V
10
1.0V
11
1.2V
5-4 DEM[1:0]
De-emphasis control of transmitter output
Amount of De-emphasis
00
No de-emphasis
01
-1.6dB
10
-3.5dB
11
-6.0dB
3-2 BW[0:1]
Bandwidth control of clock recovery circuit
Relative Bandwidth
00 1
01 2
10 4
11 Reserved
1 RDEF
Disable calibration of on-chip termination resistors and leave the resistors to
their default value
0 FEVAL
Force calibration of on-chip termination resistors
When
RDEF
=0, writing a one to
this bit will make the resistors re-calibrated. This
bit is auto-cleared and always read as zero.
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