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MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR
®
Technology in a Small Footprint
Datasheet
Revision 1.0 (04-15-09) 18 SMSC LAN8710/LAN8710i
DATASHEET
3.6 Analog Reference
3.7 Power Signals
TXN 28 AIO Transmit/Receive Negative Channel 1.
RXP 31 AIO Transmit/Receive Positive Channel 2.
RXN 30 AIO Transmit/Receive Negative Channel 2.
Table 3.7 Analog References 32-QFN
SIGNAL
NAME
32-QFN
PIN # TYPE DESCRIPTION
RBIAS 32 AI External 1% Bias Resistor. Requires a 12.1k ohm (1%) resistor to ground
connected as described in the Analog Layout Guidelines. The nominal
voltage is 1.2V and the resistor will dissipate approximately 1mW of power.
Table 3.8 Power Signals 32-QFN
SIGNAL
NAME
32-QFN
PIN # TYPE DESCRIPTION
VDDIO
12 P +1.6V to +3.6V Variable I/O Pad Power
VDDCR 6 P +1.2V (Core voltage) - 1.2V for digital circuitry on chip. Supplied by the on-
chip regulator unless configured for regulator off mode using the
LED1/REGOFF pin. A 1uF decoupling capacitor to ground should be used on
this pin when using the internal 1.2V regulator.
VDD1A 27 P +3.3V Analog Port Power to Channel 1.
VDD2A 1 P +3.3V Analog Port Power to Channel 2 and to internal regulator.
VSS FLAG GND The flag must be connected to the ground plane with a via array under the
exposed flag. This is the ground connection for the IC.
Table 3.6 10/100 Line Interface Signals (continued) 32-QFN (continued)
SIGNAL
NAME
32-QFN
PIN # TYPE DESCRIPTION