SMSC LAN8710, LAN8710i, MII 10/100, RMII 10/100 3.1MAC Interface Signals

MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology in a Small Footprint

Datasheet

Chapter 3 Pin Description

This chapter describes the signals on each pin. When a lower case “n” is used at the beginning of the signal name, it indicates that the signal is active low. For example, nRST indicates that the reset signal is active low. The buffer type for each signal is indicated in the TYPE column, and a description of the buffer types is provided in Table 3.1.

	Table 3.1 Buffer Types
BUFFER TYPE	DESCRIPTION
I8	Input.
O8	Output with 8mA sink and 8mA source.
IOD8	Input/Open-drain output with 8mA sink.
IPU	Input with 67k (typical) internal pull-up.
Note 3.1
IPD	Input with 67k (typical) internal pull-down.
Note 3.1
IOPU	Input/Output with 67k (typical) internal pull-up. Output has 8mA sink and 8mA source.
Note 3.1
IOPD	Input/Output with 67k (typical) internal pull-down. Output has 8mA sink and 8mA source.
Note 3.1
AI	Analog input
AIO	Analog bi-directional
ICLK	Crystal oscillator input pin
OCLK	Crystal oscillator output pin
P	Power pin

Note 3.1 Unless otherwise noted in the pin description, internal pull-up and pull-down resistors are always enabled. The internal pull-up and pull-down resistors prevent unconnected inputs from floating, and must not be relied upon to drive signals external to LAN8710/LAN8710i. When connected to a load that must be pulled high or low, an external resistor must be added.

Note: The digital signals are not 5V tolerant.They are variable voltage from +1.6V to +3.6V, as shown in Table 7.1.

3.1MAC Interface Signals

			Table 3.2 MII/RMII Signals 32-QFN
SIGNAL	32-QFN
NAME	PIN #	TYPE	DESCRIPTION
TXD0	22	I8	Transmit Data 0: The MAC transmits data to the transceiver using this
			signal in all modes.
TXD1	23	I8	Transmit Data 1: The MAC transmits data to the transceiver using this
			signal in all modes

Revision 1.0 (04-15-09)	14	SMSC LAN8710/LAN8710i
	DATASHEET