SMSC LAN9420, LAN9420i NUM, PINS, NAME, TYPE, BUFFER, SYMBOL, DESCRIPTION, Crystal Input:, Crystal Output:, Table 2.5 PLL and Ethernet PHY Pins

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

Datasheet

Table 2.5 PLL and Ethernet PHY Pins

NUM			BUFFER
PINS	NAME	SYMBOL	TYPE	DESCRIPTION
	Crystal Input	XI	ICLK	Crystal Input: External 25MHz crystal input. This pin
1				can also be driven by a single-ended clock oscillator.
				When this method is used, XO should be left
				unconnected.
1	Crystal	XO	OCLK	Crystal Output: External 25MHz crystal output.
	Output
	Ethernet TX	TPO-	AIO	Ethernet Transmit Data Out Negative: The transmit
1	Data Out			data outputs may be swapped internally with receive
	Negative			data inputs when Auto-MDIX is enabled.
	Ethernet TX	TPO+	AIO	Ethernet Transmit Data Out Positive: The transmit
1	Data Out			data outputs may be swapped internally with receive
	Positive			data inputs when Auto-MDIX is enabled.
	Ethernet RX	TPI-	AIO	Ethernet Receive Data In Negative: The receive data
1	Data In			inputs may be swapped internally with transmit data
	Negative			outputs when Auto-MDIX is enabled.
	Ethernet RX	TPI+	AIO	Ethernet Receive Data In Positive: The receive data
1	Data In			inputs may be swapped internally with transmit data
	Positive			outputs when Auto-MDIX is enabled.
	External	EXRES	AI	External PHY Bias Resistor: Used for the internal
1	PHY Bias			PHY bias circuits. Connect to an external 12.4K 1.0%
	Resistor			resistor to ground.

SMSC LAN9420/LAN9420i	19	Revision 1.22 (09-25-08)
	DATASHEET