Table 509: Auxiliary Control Register (Phy_Addr = 0X1, Reg_Addr = 18H, Shadow = 001, 10Base-T) - Broadcom BCM5722 Programmer's Manual

Programmer's Guide
10/15/07
A C
UXILIARY ONTROL
10BASE-T)

Table 509: Auxiliary Control Register (PHY_Addr = 0x1, Reg_Addr = 18h, Shadow = 001, 10BASE-T)

Bit Field
15 Manchester Code Error Indicates that a Manchester code violation was received.
14 EOF Error
13 Polarity Error
12 Block RX_DV
Extension (IPG)
11 10BASE-T TXC Invert
Mode
10 Reserved
9 Jabber Disable
8 1000BASE-T Signal
Detect
7 10BASE-T Signal
Detect Threshold
6 10BASE-T Echo Mode When enabled, during 10BASE-T half-duplex transmit
Document 5722-PG101-R
R (PHY_A
EGISTER
Description
This bit is valid only during 10BASE-T operation.
• 1 = Manchester Code Error (10BASE-T).
• 0 = No Manchester Code error.
Indicates that the End Of Frame (EOF) sequence was
improperly received, or not received at all. This bit is valid
only during 10BASE-T operation.
• 1 = EOF error detected (10BASE-T).
• 0 = No EOF error detected.
Indicates that an analog input polarity error has been
detected and corrected. This bit is valid only during 10BASE-
T operation.
• 1 = Channel polarity inverted.
• 0 = Channel polarity correct.
When this bit is set, blocking of RX_DV signal is extended for
four additional RXC cycles to extend IPG.
• 1 = Block RX_DV for four additional RXC cycles for IPG.
• 0 = Normal operation.
When set to 1, this bit causes the polarity of the 10BASE-T
transmit clock to be inverted. Writing 0 restores normal
transmit clock polarity. This bit is valid only during 10BASE-
T operation.
• 1 = Invert TXC output.
• 0 = Normal operation.
Write as 0, ignore on read.
Writing a 1 to bit 9 of the Auxiliary Control Register allows the
user to disable the Jabber Detect function defined in the
IEEE standard. This function shuts off the transmitter when a
transmission request has exceeded a maximum time limit.
Writing a 0 to this bit or resetting the chip restores normal
operation. Reading this bit returns the value of Jabber Detect
Disable. Valid for 10BASE-T operation only.
• 1 = Jabber function disabled.
• 0 = Jabber function enabled.
• 1 = Low SD threshold.
• 0 = Normal SD threshold.
• 1 = Low SD threshold.
• 0 = Normal SD threshold.
operation, the transmitted data is replicated on the receive
data pins and the TXEN signal echoes onto the RXDV pin.
The TXEN signal also echoes onto the CRS pin and the CRS
deassertion directly follows the TXEN deassertion.
• 1 = Echo transmit data to receive data.
• 0 = Normal operation.
Bro adco m Co rp or atio n
= 0 1, R _A
DDR X EG
= 18 , S
DDR H HADOW
Init
0
0
0
0
0
0
0
0
0
0
Transceiver Registers
BCM5722
= 001,
Access
RO
LH
RO
LH
RO
R/W
R/W
RO
R/W
R/W
R/W
R/W
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