Broadcom BCM5722 - Table 528: Auxiliary 1000 BASE-X Control Register (Address 1 Ch, Shadow Value 11011)

Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Transceiver Registers Page 470
AUXILIARY 1000BASE-X CONTROL (PHY_ADDR = 0X1, REG_ADDR = 1CH, SHADOW
11011B)
Write Enable
During a write to this register, setting Auxiliary 1000BASE-X Control register 2 bit 15 to a 1 allows writing to bits [7:0] of this
register. For reading the values of bits [9:0], perform an MDIO write with bit 15 set to a 0 and preferred shadow values in bits
[14:10]. The next MDIO read of register address 1Ch contains the preferred shadow register values in bits [9:0].
Shadow Register Selector
Bits [14:10] of this register must be set to 11011 to enable read/write to the Auxiliary 1000BASE-X Control register.
Use SerDes Mode Counters
Setting bit 9 of the Auxiliary 1000BASE-X Control register enables SerDes data to be presented on register 12h–14h.
Disable Remote Fault Sensing
Setting bit 4 of the Auxiliary 1000BASE-X Control register disables automatic remote fault sensing of an auto-negotiation
resolution error.
Comma Detect Enable
Setting bit 2 of Auxiliary 1000BASE-X Control register enables comma detection.
Table 528: Auxiliary 1000BASE-X Control Register (Address 1Ch, Shadow Value 11011)
Bit Field Description Init Access
15 Write Enable • 1 = Write bits [9:0].
• 0 = Read bits [9:0].
0R/W
14:10 Shadow Register Selector 11011 = Auxiliary 1000BASE-X Control register. 11011 R/W
9 Use SerDes Mode Counters
• 1 = Use registers 12–14h for SerDes data.
• 0 = Normal operation.
0R/W
8:5 Reserved Write as 0h, ignore when read. 0h R/W
4 Disable Remote Fault Sensing
• 1 = Disable automatic remote fault sensing of auto-
negotiation resolution error.
• 0 = Normal Operation.
0R/W
3 Reserved Write as 0, ignore when read. 0 R/W
2 Comma Detect Enable
• 1 = Enable comma detection.
• 0 = Disable comma detection.
1R/W
1 FIFO Elasticity
• 1 = High elasticity to support jumbo packets
(supports 10/100/1000 jumbo packets).
• 0 = Low elasticity (low latency).
1R/W
0 Disable CRC Checker
• 1 = Disable CRC checker.
• 0 = Enable CRC checker.
1R/W