Table 559: Miscellaneous Control Register (Shadow Register 16D, 10H); Table 560: Auxiliary Status 2 Register (Shadow Register 27D, 1Bh) - Broadcom BCM5722 Programmer's Manual

BCM5722
S R
HADOW EGISTER
The following tables describe the shadow registers bits and their function. Shadow register access is enabled by writing a 1
to bit 7 of MII register 31 (1Fh). When non-shadow register access is required, write a 0 to bit 7 of MII register 31 (1Fh).
Miscellaneous Control Register (Shadow Register)

Table 559: Miscellaneous Control Register (Shadow Register 16d, 10h)

BIt Name
15 Reserved
14 Forced Auto-MDIX Enable
13 Reserved
12 Auto-Negotiation H/W Override
Enable
11:0 Reserved
R/W = Read/Write, RO = Read only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL and LH Clear after read
operation. Use default values of reserved bit(s) when writing to reserved bit(s).
Forced Auto-MDIX Enable
When this bit is set to 0, HP. Auto-MDIX is in effect while the Auto-Negotiation is enabled. If Auto-Negotiation is not enabled
(Forced 100BT or Forced 10BT full- or half-duplex) and if Auto MDIX is still needed, set this bit to 1.
Auto-Negotiation Hardware Override
The PHY uses ANEN and F100 functions from the power-on reset values. When this bit is set to 1, the PHY uses ANEN,
F100, and FDX from MII register 0h, bits 12, 13, and 8 respectively.
Auxiliary Status 2 Register (Shadow Register)

Table 560: Auxiliary Status 2 Register (Shadow Register 27d, 1Bh)

BIt Name
15 MLT3 Detected
14:12 Cable Length 100X[2:0]
11:6 Reserved
5 APD Enable
4 APD Sleep Timer
3:0 APD Wake-Up Timer[3:0]
R/W = Read/Write, RO = Read only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL and LH Clear after read
operation. Use default values of reserved bit(s) when writing to reserved bit(s).
Page 509 Transceiver Registers (BCM5906/BCM5906M)
D D
ETAILED ESCRIPTION
R/W Description
- -
R/W 1 = Enable Auto-MDIX
- -
R/W 0 = Use ANEN and F100 as determined by hardware
power-on reset.
1 = Ignore hardware settings for ANEN and F100. Use MII
register 0 values.
- -
R/W Description
R/O 1 = MLT3 detected
R/O The PHY shows the cable length in 20-meter increments
- -
R/W 0 = Normal mode
1 = Enable auto power-down mode
R/W 0 = 2.5-second sleep before wake up
1 = 5.0-second sleep before wake up
R/W Duration of wake up
Bro adco m C orp or atio n
Programmer's Guide
10/15/07
Default
0
0
0
0
0000h
Default
0h
00h
0
0
0001
Document 5722-PG101-R