GX4002 Datasheet, PDF (63/74 Pages) Gennum Corporation – Dynamic on-chip power management control

Table 7-1: Configuration and Status Register Map (Continued)
Register Name
LOOPBK_REG1
LOOPBK_REG2
Register
Address^d
7
8
Parameter Name
LBCH1INEN
LBCH1INPRBSGEN
LBCH1INCH0DATA
RSVD
LBCH1OUTEN
LBCH1OUTCH0DATA
LBCH1OUTPRBSGEN
LBCH1OUTCH1CLK
LBCH0INEN
LBCH0INPRBSGEN
LBCH0INCH0DATA
RSVD
LBCH0OUTEN
LBCH0OUTCH0DATA
LBCH0OUTPRBSGEN
LBCH0OUTCH1CLK
Bit
Position
0:0
1:1
2:2
3:3
4:4
5:5
6:6
7:7
0:0
1:1
2:2
3:3
4:4
5:5
6:6
7:7
Access
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
PRBSGENCLKSEL
0:0
RW
LOOPBK_REG3
9
PRBSCHKCLKSEL
1:1
RW
RSVD
7:2
RW
CH0PLL_REG1
CH0PLLLBWCURVT
10
RSVD
4:0
RW
7:5
RW
CH0PLL_REG2
CH0PLLLBWCURVBE
11
RSVD
4:0
RW
7:5
RW
RSVD
1:0
RW
RSVD
12
CH0PLLCUR
3:2
RW
RSVD
7:4
RW
RSVD
13
RSVD
7:0
RW
NOTE: * Indicates bits for lower data rates (below 10G operation)
Reset Value^b
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
000111
10011
000
01110
000
01
01
0000
00100000
Valid
Range^d
Function
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-63
0-31
0-7
0-31
0-7
0-3
0-3
0-15
0-255
Selects LB input into Ch1 CDR.
Selects PRBS generator output into Ch1 CDR.
Selects Ch0 data into Ch1 CDR.
Reserved. Do not change.
Selects LB input into Ch1 Driver.
Selects Ch0 data into Ch1 Driver.
Selects PRBS generator output into Ch1 Driver.
Selects Ch1 Clock into Ch1 Driver.
Selects LB input into Ch0 CDR.
Selects PRBS generator output into Ch0 CDR.
Selects Ch0 data into Ch0 CDR.
Reserved. Do not change.
Selects LB input into Ch0 Driver.
Selects Ch1 data into Ch0 Driver.
Selects PRBS generator output into Ch0 Driver.
Selects Ch1 clock into Ch0 Driver.
When HIGH, selects Ch0 recovered clock. LOW
selects Ch1 clock.
When HIGH selects Ch0 recovered clock. LOW
selects Ch1 clock.
Reserved. Do not change.
Adjusts LBW positive temperature coefficient
control.
Reserved. Do not change.
Adjusts LBW negative temperature coefficient
control.
Reserved. Do not change.
Reserved. Do not change.
CH0PLL control current.
Reserved. Do not change.
Reserved. Do not change.
GX4002 2x2 14.025Gb/s Crosspoint Switch with Trace
Equalization and Output De-Emphasis
Data Sheet
55972 - 0
March 2012
63 of 74
Proprietary & Confidential