Intel 8 LAN manual LED 1 Configuration and Power Management Word 17h

ICH8—NVM Information Guide

1.4.19LED 1 Configuration and Power Management (Word 17h)

This field specifies the default values for the LEDCTL register fields controlling the LED1 (LINK_1000) output behaviors and the OEM fields defining the PHY power management parameters loaded to the PHY_CTRL register.

Table 15.	LED 1 Configuration and Power Management (Word 17h)
	Bit	Name	Default		Description
				This bit enables Smart Power Down in back-to-back link setup.
	15	B2B Enable	1b	0b = B2B disabled.
				1b	= B2B enabled.
				GbE Disable (in all power states)
	14	GbE Disable	0b	0b = GbE enabled.
				1b	= GbE disabled.
	13:12	Reserved	00b	These bits are reserved and should be set to 00b.
		GbE Disable in non-		GbE Disable (in all power states except D0a)
	11		1b	0b	= GbE enabled.
		D0a
				1b	= GbE disabled.
				The Low Power Link Up enables link at the lowest speed supported
		LPLU Enable in non-		by both link partners in non-D0a states. This bit must be set if
	10		1b	LPLU Enable bit is set.
		D0a		0b	= Low Power Link Up is disabled.
				1b	= Low Power Link Up is enabled in all non-D0a states.
				The Low Power Link Up enables link at the lowest speed supported
				by both link partners in all power states. This bit enables a
	9	LPLU Enable	0b	decrease in link speed in all power states.
				0b	= Low Power Link Up is disabled.
				1b	= Low Power Link Up is enabled in all power states.
	8	SPD Enable	1b	0b	= PHY Smart Power Down mode is disabled.
				1b	= PHY Smart Power Down mode is enabled.
				This bit indicates the initial value of the LED1_BLINK field.
	7	LED1 Blink	0b	0b = LED1 is non-blinking (recommended).
				1b	= LED1 is blinking.
				This bit indicates the initial value of the LED1_IVRT field.
	6	LED1 Invert	0b	0b = LED1 has an active low output.
				1b	= LED1 has an active high output.
				This bit defines the LED1 blink mode:
	5	LED1 Blink Mode	0b	0b	= Blink at 200 ms on and 200 ms off.
				1b	= Blink at 83 ms on and 83 ms off.
				This field should be identical to LED0 Blink Mode.
				Enable Filtered Activity LED (while operating with the 82562V)
				When set to 0b, the activity LED is activated by the PHY.
	4	Filtered ACT LED	0b	When set to 1b, the activity LED is driven by Tx activity or Rx
				traffic that match any of the MAC's MAC addresses.
				For the 82566, this bit is reserved and should be set to 0b.
				These bits represent the initial value of the LED1_MODE field,
				which specifies the event, state, or pattern displayed on LED1
	3:0	LED1 Mode	0111b	(LINK_1000) output. Table 16 defines the values for LED1 Mode.
				A value of 0111b indicates that a 1000 Mb/s link is established and
				maintained.

The following table lists the LED modes defined in bits 3:0 of this word.

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