Broadcom BCM5722 - Table 509: Auxiliary Control Register (Phy_Addr = 0 X1, Reg_Addr = 18 H, Shadow = 001, 10 BASE-T)

Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Transceiver Registers Page 446
AUXILIARY CONTROL REGISTER (PHY_ADDR = 0X1, REG_ADDR = 18H, SHADOW = 001,
10BASE-T)
Table 509: Auxiliary Control Register (PHY_Addr = 0x1, Reg_Addr = 18h, Shadow = 001, 10BASE-T)
Bit Field Description Init Access
15 Manchester Code Error Indicates that a Manchester code violation was received.
This bit is valid only during 10BASE-T operation.
• 1 = Manchester Code Error (10BASE-T).
• 0 = No Manchester Code error.
0RO
LH
14 EOF 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.
0RO
LH
13 Polarity Error 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.
0RO
12 Block RX_DV
Extension (IPG)
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.
0R/W
11 10BASE-T TXC Invert
Mode
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.
0R/W
10 Reserved Write as 0, ignore on read. 0 RO
9 Jabber Disable 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.
0R/W
8 1000BASE-T Signal
Detect
• 1 = Low SD threshold.
• 0 = Normal SD threshold.
0R/W
7 10BASE-T Signal
Detect Threshold
• 1 = Low SD threshold.
• 0 = Normal SD threshold.
0R/W
6 10BASE-T Echo Mode When enabled, during 10BASE-T half-duplex transmit
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.
0R/W