LAN8810 Datasheet, PDF (27/83 Pages) Microchip Technology – GMII 10/100/1000 Ethernet Transceiver

LAN8810/LAN8810I
The LED mode is configured via the LED_MODE[1:0] field of the Extended Mode Control/Status Register. The func-
tional operation of the LEDs in each mode is described in Table 3-11, Table 3-12 and Table 3-13.
Note 1: LED Mode 3 is the default mode of operation and requires four LEDs for full operation.
2: LED Modes 1 and 2 require two dual LED packages (two LEDs in each package). LED Mode 2 provides
collision detection, while LED Mode 1 does not.
TABLE 3-11: LED MODE 1 OPERATION - LED_MODE[1:0]=01B
LED
STATUS
DESCRIPTION
100_LED
1000_LED
100_LED &
1000_LED
ACT_LED
10_LED
10_LED &
ACT_ LED
On Color1
On Color2
On Color3
Note 3-4
On Color1
Note 3-5
On Color2
Off
On Color1
Off/Color2
Color1/Color2
100BASE-T link
1000BASE-T link
10BASE-T link
Link operates at full duplex
Transmit/receive activity
Half duplex, no activity
Full duplex, no activity
Half duplex, transmit/receive activity
Full duplex, transmit/receive activity
Note 3-4
Note 3-5
Switching at 50% duty cycle creates a third color (e.g., If Color1 is orange and Color2 is green, Color
3 will be yellow (Orange + Green)).
Activity will cause duplex LED color to blink.
TABLE 3-12: LED MODE 2 OPERATION - LED_MODE[1:0]=10B
LED
STATUS
DESCRIPTION
1000_LED
100_LED
100_LED &
1000_LED
ACT_LED
10_LED
10_LED &
ACT_LED
On Color1
On Color2
On Color3
Note 3-4
On Color1
Note 3-7
On Color2
On Color3
Note 3-4
Off
On Color1
Off/Color2
Color1/Color2
1000BASE-T link
100BASE-T link
10BASE-T link
Link operates at full duplex
Transmit/receive activity
Collision
Half duplex, no activity
Full duplex, no activity
Half duplex, transmit/receive activity
Full duplex, transmit/receive activity
Note 3-6
Note 3-7
Switching at 50% duty cycle creates a third color (e.g., If Color1 is orange and Color2 is green, Color
3 will be yellow (Orange + Green))
Activity will cause duplex LED color to blink.
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DS00001870B-page 27