Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Ethernet MAC Control Registers Page 248
12:11 LED_MODE
(Note: BCM5906 is
10/100 only.)
• 00 = MAC Mode—LED signal is in active low (on) when link
is established and is in high (off) when link is not established.
- LINKLEDB = LED10 (from MAC core)
- SPD100LEDB = LED100 (from MAC core)
- SPD1000LEDB = LED1000 (from MAC core)
- TRAFFICLEDB = LED_TRAFFIC (from MAC core)
• 01 = PHY Mode—LED signal is in active low (on) when link is
established and is in tristate (off) when link is not established.
- LINKLEDB = Link 10 (open drain) (from PHY core)
- SPD100LEDB = Link 100 (open drain) (from PHY core)
- SPD1000LEDB = Link 1000(open drain) (from PHY core)
- TRAFFICLEDB = PHY RCVLED or PHY XMTLED (from
PHY core)
• 10 = PHY Mode 2—LED signal is in active low (on) when link
has a valid data or idle signal and is in high (off) when link is
not established.
- LINKLEDB = Link10 = Link10 (from PHY core)
- SPD100LEDB = Link100 = Link100 and valid data or idle
(from PHY core)
- SPD1000LEDB = Link1000 = Link1000 and valid data or
idle (from PHY core)
- TRAFFICLEDB = RCVLED or XMTLED (from PHY core)
• 11 = Same as PHY Mode 1 and is used for wireless combo
mode (that is, when bit 15 of this register is set to 1).
00 RO
10 Traffic LED status – 0 RO
9 10Mbps LED status – 0 RO
8 100Mbps LED status – 0 RO
7 1000Mbps LED status – 0 RO
Reserved (BCM5906 only) –
6 Traffic LED If set along with the Override Traffic bit, the Traffic LED is turned
on. If the Blink Traffic LED bit is also set, the LED will blink with
blink rate specified in Override Blink Rate (bit 31) and Blink
Period (bit 30:19) fields.
0R/W
5 Blink Traffic LED If set along with the Override Traffic bit and Traffic LED bit, the
Traffic LED will blink with the blink rate specified in Override
Blink rate (bit 31) and Blink Period (bit 30:19) fields.
0R/W
4 Override Traffic LED If set, overrides hardware control of the Traffic LED. The Traffic
LED will then be controlled via bit 6 and bit 5.
0R/W
3 10 Mbps LED If set along with the LED Override bit, turns on the 10 Mbps LED. 0 R/W
2 100 Mbps LED If set along with the LED Override bit, turns on the 100 Mbps
LED.
0R/W
1 1000 Mbps LED If set along with the LED Override bit, turns on the 1000 Mbps
LED.
0R/W
Reserved (BCM5906 only) –
0 Override Link LEDs If set, overrides hardware control of the three link LEDs. The
LEDs will then be controlled via bits 3:1.
0R/W
Table 193: LED Control Register (Offset 0x40C) (Cont.)
Bit Field Description Init Access
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