Intel 8 LAN manual 1.4.20LED 0 and 2 Configuration Defaults Word 18h, LED Modes

NVM Information Guide—ICH8

Table 16.	LED Modes
	Mode (Bits	Selected Mode	Source Indication
	3:0)
	0000b	LINK_10/1000	Asserted when either 10 Mb/s or 1000 Mb/s link is established
			and maintained.
	0001b	LINK_100/1000	Asserted when either 100 Mb/s or 1000 Mb/s link is
			established and maintained.
	0010b	LINK-UP	Asserted when any speed link is established and maintained.
	0011b	FILTER_ACTIVITY	Asserted when link is established and packets are being
			transmitted or received that passed MAC filtering.
	0100b	LINK/ACTIVITY	Asserted when link is established and when there is no
			transmit or receive activity.
	0101b	LINK_10	Asserted when a 10 Mb/s link is established and maintained.
	0110b	LINK_100	Asserted when a 100 Mb/s link is established and maintained.
	0111b	LINK_1000	Asserted when a 1000 Mb/s link is established and maintained.
	1000b	Reserved	Reserved.
	1001b	FULL_DUPLEX	Asserted when the link is configured for full duplex operation.
	1010b	COLLISION	Asserted when a collision is observed.
	1011b	ACTIVITY	Asserted when link is established and packets are being
			transmitted or received.
	1100b	BUS_SIZE	Asserted when the MAC detects a 1-lane PCIe* connection.
	1101b	PAUSED	Asserted when the MAC transmitter is flow controlled.
	1110b	LED_ON	Always asserted.
	1111b	LED_OFF	Always de-asserted.

1.4.20LED 0 and 2 Configuration Defaults (Word 18h)

This NVM word specifies the hardware defaults for the LEDCTL register fields controlling the LED0 (LINK/ACTIVITY) and LED2 (LINK_100) output behaviors.

Table 17. LED 0 and 2 Configuration Defaults (Word 18h)

Bit	Name	Default		Description
			This bit indicates the initial value of the LED2_BLINK field.
15	LED2 Blink	0b	0b	= LED2 is non-blinking.
			1b	= LED2 is blinking.
			This bit indicates the initial value of the LED2_IVRT field.
14	LED2 Invert	0b	0b	= LED2 has an active low output.
			1b	= LED2 has an active high output.
			This bit defines the LED2 blink mode:
13	LED2 Blink Mode	0b	0b	= Blink at 200 ms on and 200 ms off.
			1b	= Blink at 83 ms on and 83 ms off.
			Note: This field should be identical to the LED0 Blink Mode.
12	Reserved	0b	This bit is reserved and should be set to 0b.
			These bits represent the initial value of the LED2_MODE field,
11:8	LED2 Mode	0110b	which specifies the event, state, or pattern displayed on LED2
			(LINK_100) output. A value of 0110b causes this to indicate
			100 Mb/s operation.

16