SMSC LAN9312 manual 30

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

Table 3.3 LAN Port 1 & 2 Power and Common Pins (continued)

			BUFFER
PIN	NAME	SYMBOL	TYPE	DESCRIPTION
	+3.3V Port 2	VDD33A2	P	+3.3V Port 2 Analog Power Supply
122,125	Analog Power			Refer to the LAN9312 application note for
	Supply
				additional connection information.
	+3.3V Master	VDD33BIAS	P	+3.3V Master Bias Power Supply
120	Bias Power			Refer to the LAN9312 application note for
	Supply
				additional connection information.
	Port 2	VDD18TX2	P	Port 2 Transmitter +1.8V Power Supply: This pin
	Transmitter			is supplied from the internal PHY voltage regulator.
	+1.8V Power			This pin must be tied to the VDD18TX1 pin for
121	Supply			proper operation.
				Refer to the LAN9312 application note for
				additional connection information.
	Port 1	VDD18TX1	P	+1.8V Port 1 Transmitter Power Supply: This pin
	Transmitter			must be connected directly to the VDD18TX2 pin
118	+1.8V Power			for proper operation.
	Supply			Refer to the LAN9312 application note for
				additional connection information.
		Table 3.4 Host Bus Interface Pins
			BUFFER
PIN	NAME	SYMBOL	TYPE	DESCRIPTION
4-6,	Host Bus	D[31:0]	IS/O8	Host Bus Data High: Bits 31-0 of the Host Bus 32-
8-12,	Data			bit data port.
15-17,19,				Note: Big and little endianess is supported.
20,22-26,
28-32,
34-38,
41-44
	Host Bus	A[9:2]	IS	Host Bus Address: 9-bit Host Bus Address Port
45,47,	Address			used to select Internal CSR’s and TX and RX
49-53,				FIFO’s.
55				Note: The A0 and A1 bits are not used because
				the LAN9312 must be accessed on
				DWORD boundaries.
57	Read Strobe	nRD	IS	Read Strobe: Active low strobe to indicate a read
				cycle. This signal is qualified by the nCS chip
				select.
58	Write Strobe	nWR	IS	Write Strobe: Active low strobe to indicate a write
				cycle. This signal is qualified by the nCS chip
				select.
59	Chip Select	nCS	IS	Chip Select: Active low signal used to qualify read
				and write operations.

Revision 1.4 (08-19-08)	30	SMSC LAN9312
	DATASHEET