Table 520: Led Status Register (Address 1Ch, Shadow Value 01000) - Broadcom BCM5722 Programmer's Manual

BCM5722
LED S (PHY_A
TATUS

Table 520: LED Status Register (Address 1Ch, Shadow Value 01000)

Bit Field
15 Write Enable
14:10 Shadow Register Selector
9 Reserved
8 Slave Indicator
7 FDX Indicator
6 INTR Indicator
5 Reserved
4:3 LINKSPD Indicator
2 Transmit Indicator
1 Receive Indicator
0 Quality Indicator
Write Enable
During a write to this register, setting LED Status register 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 01000 to enable read/write to the LED Status register.
Slave Indicator
When LED Status register bit 8 returns a 0, the device is in the slave mode. When this bit returns a 1, the device is not in
the slave mode.
FDX Indicator
When LED Status register bit 7 returns a 0, the device is in the full-duplex mode. When this bit returns a 1, the device is not
in the full-duplex mode.
Page 459 Transceiver Registers
= 0 1, R _A
DDR X EG DDR
Description
• 1 = Write bits [9:0].
• 0 = Read bits [9:0].
01000 = LED Status register.
Write as 0, ignore when read.
• 1 = Master mode.
• 0 = Slave mode.
• 1 = Half-duplex mode.
• 0 = Full-duplex mode.
• 1 = No active Interrupt.
• 0 = Interrupt activated.
Write as 0, ignore when read.
• 11 = No Link established.
• 10 = 10BASE-T Link established.
• 01 = 100BASE-TX Link established.
• 00 = 1000BASE-T Link established.
• 1 = No transmit activity.
• 0 = Transmit activity.
• 1 = Not receive activity.
• 0 = Receive activity.
• 1 = Quality is not good.
• 0 = Quality is good.
Bro adco m C orp or atio n
= 1C , S 01000
H HADOW
Programmer's Guide
10/15/07
)
B
Init Access
0 R/W
01000 R/W
0 R/W
0 RO
0 RO
0 RO
0 RO
00 RO
0 RO
0 RO
0 RO
Document 5722-PG101-R