SMSC LAN9420, LAN9420i Basic Control Register, BITS, TYPE, Note:, DEFAULT, Loopback, RESERVED, RESERVED, Power Down, DESCRIPTION, Duplex Mode, Speed Select, PHY Soft Reset

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

					Datasheet
4.5.1	Basic Control Register
	Index (In Decimal): 0	Size:	16 bits
BITS	DESCRIPTION			TYPE	DEFAULT
15	PHY Soft Reset			R/W/SC	0b
	1 = PHY software reset. Bit is self-clearing. When setting this bit do not set
	other bits in this register.
14	Loopback			R/W	0b
	1 = loopback mode, 0 = normal operation
13	Speed Select			R/W	1b
	1 = 100Mbps, 0 = 10Mbps. Ignored if Auto Negotiation is enabled (0.12 =
	1).
12	Auto-Negotiation Enable			R/W	1b
	1 = enable auto-negotiate process (overrides 0.13 and 0.8) 0 = disable
	auto-negotiate process.
11	Power Down			R/W	0b
	1 = General Power-Down mode, 0 = normal operation
	Note: For maximum power savings, auto-negotiation should be disabled
	before enabling the General Power-Down mode.
10	RESERVED			RO	-
9	Restart Auto-Negotiate			R/W/SC	0b
	1 = restart auto-negotiate process 0 = normal operation. Bit is self-clearing.
8	Duplex Mode			R/W	0b
	1 = full duplex, 0 = half duplex. Ignored if Auto Negotiation is enabled (0.12
	= 1).
7	Collision Test			R/W	0b
	1 = enable COL test, 0 = disable COL test
6:0	RESERVED			RO	-

Revision 1.22 (09-25-08)	136	SMSC LAN9420/LAN9420i
	DATASHEET