SerDes PHY Register Definitions
BCM5718 Programmer’s Guide
Broadcom
®
January 29, 2016 • 5718-PG108-R
Page 562
FXCONTROL1
Register Description:
100FX enabling control register
Register Offset:
0x10 at Block 2
10
LATCH_LINKDOWN
RO
1 = Link has been down since register 0*13h bit [9] has
been written a '1'
0 = Link has not been down since register 0*13h bit [9] has
been written a '1'
0
9
SD_FILTER
RO
1 = Output of signal detect filter is set
0 = Output of signal detect is not set
Note:
This signal is used for the PCS synchronization.
When register 0*10h bit [2] is 0, then the output of the filter
will be forced high. This status signal is still valid when
register 0*10h bit [14] is 1. Noise pulses less than 16 ns
wide are still removed when even the filter is disabled.
0
8
SD_MUX
RO
1 = Output of signal detect filter is set
0 = Output of signal detect is not set
Note:
This is the only SD status bit that will be valid when
the SerDes is powered down from register 0.11. This status
signal is the “signal detect” input port when register 0*10h
bit [3] is 0, otherwise it is the “signal detect” input port
inverted.
0
7
SD_FILTER_CHG
RO
1 = Signal detect has changed since last read
0 = Signal detect has not changed since last read
Note:
The signal detect change is based on a change in bit
[9] of this register
0
6
SIGNAL_DETECT
RO
Signal detect directly from pin
0
5
ANA_SIGNAL_DET
RO
Analog signal detect status bit. This status signal is the
analog signal detect status if register 0*13h bit [0] is set,
otherwise it is the value based on register 0*13h bit [1].
0
4
ANA_SIGDET_CHG
RO
1 = Analog signal detect has changed since last read
0 = Analog signal detect has not changed since last read
Note:
The analog signal detect change is based on a
change in bit [5] of this register.
0
3:0
RESERVED
RO
Reserved
0
Table 140: FXCONTROL1
Bits
Name
RW
Description
Default
15
RESERVED
RW
Reserved
0
14
FIBER_AUTOPWRDWN_WAKE
UP
RW
1 = Wake up for 250ms before powering down
0 = Wake up for 42ms before powering down
0
Table 139: 1000XSTATUS3 (Cont.)
Bits
Name
RW
Description
Default