EVB8710 Evaluation Board User Manual
SMSC EVB8710
USER MANUAL
Revision 1.1 (05-24-10)
3
2 Board Details
This section includes the following EVB8710 board details:
2.1
Power
2.1.1
+5V Power
Power is normally supplied to the EVB8710’s +3.3V regulator externally via the +5V power pins of the
MII connector. If desired, the EVB8710 can be powered w5V present on the MII connector by
sup5V to the TP2 (red) test point with ground connected to pin 20 of the J1 header.
Note:
Before connecting an external power supply to TP2, ensure power is not present on the MII
connector’s +5V pins. Conn5V simultaneously via the MII connector and TP2 may
result in permanent damage to the board.
2.1.2
VDDIO Power
The LAN8710A’s VDDIO power may be supplied at a voltage other than +3.3V by depopulating resistor
R12 and sup1.6V to +3.6V externally via test point TP5 (purple), with ground connected to pin
20 of the J1 header.
Note:
Before connecting an external power supply to TP5, ensure that resistor R12 has been
removed. Connecting an external power supply to TP5 while resistor R12 is populated may
result in permanent damage to the board.
2.1.3
+1.2V Power
The LAN8710A’s in1.2V regulator can be optionally disabled. Refer to
+1.2V Regulator Configuration (REGOFF)," on page 6
for additional information.
