GX4002 Datasheet, PDF (33/74 Pages) Gennum Corporation – Dynamic on-chip power management control

Register Name
CH0PLL_REG10
CH1PLL_REG10
Register
Address^d
19
29
Parameter Name
CH0PLLLOL
CH1PLLLOL
Bit
Position
1:1
1:1
Access
RO
RO
Reset Value^b
0
0
Valid
Range^d
Function
0-1
Ch0 CDR loss of lock when HIGH.
0-1
Ch1 CDR loss of lock when HIGH.
3.5.4 Ch0FAULT - Channel 0 Fault
Various status indicator pins are combined to generate a single Ch0FAULT indicator
output. The Ch0FAULT output is, by default, an open-drain output. It can be configured
in a LVCMOS/LVTTL compliant mode through register 2, bit 3
(OPENDRAINCH0FAULT). When set LOW, the Ch0FAULT output is configured as
LVCMOS/LVTTL compatible output.
The Ch0FAULT output is active-high by default. Its polarity can be changed to make it
active-low through register 2, bit 0 (POLINVCH0FAULT). When set HIGH, Ch0FAULT is
configured as an active-low output.
The following status indicator controls can be combined to generate the Ch0FAULT
output. Each of the indicators can be independently masked through the register
controls. By default, the Ch0FAULT output combines (ORs) the status of all indicators.
The following registers control the masking of the various indicators for Ch0FAULT and
the configuration of Ch0FAULT pin.
Register Name
Register
Address^d
Parameter Name
Bit
Position
Access
Reset Value^b
Valid
Range^d
Function
FAULTMASKCH1LOS
0:0
RW
1
0-1
FAULTMASKCH1LOL
1:1
RW
1
0-1
TOP_REG1
1
FAULTMASKCH0LOS
2:2
RW
1
0-1
FAULTMASKCH0LOL
3:3
RW
1
0-1
FAULTMASKCH0FAULT
4:4
RW
0
0-1
TOP_REG2
POLINVCH0FAULT
0:0
RW
0
0-1
2
OPENDRAINCH0FAULT
3:3
RW
1
0-1
NOTE: To support system diagnostics, a manual Ch0FAULT assert feature is available through the following register:
TOP_REG4
4
FORCECH0FAULT
4:4
RW
0
0-1
When HIGH, masks out Ch1LOS from
asserting CH0FAULT.
When HIGH, masks Ch1LOL from asserting
Ch0FAULT.
When HIGH, masks outCh0LOS from
asserting CH0FAULT.
When HIGH, masks Ch0LOL from asserting
Ch0FAULT.
When HIGH, masks out Ch0Fault from
asserting CH0FAULT.
When HIGH, inverts polarity of CH0FAULT
output.
When HIGH, makes CH0FAULT output driver
open drain.
When HIGH, asserts CH0FAULT.
3.6 Test Features
The GX4002 contains built-in test features that can be used during module test, mission
mode, or system testing.
GX4002 2x2 14.025Gb/s Crosspoint Switch with Trace
Equalization and Output De-Emphasis
Data Sheet
55972 - 0
March 2012
33 of 74
Proprietary & Confidential