UM0529
Power requirements
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4 Power
requirements
The recommended supply voltages for the STUSB02E/STUSB03E USB transceivers are
the following:
1.
V
IF
= 1.6 - 3.6 V (typical value: V
IF
= 1.8 V)
2. V
BUS
= 4.0 - 5.5 V (typical value: V
BUS
= 5 V)
The V
IF
for the USB transceiver can be obtained from the onboard voltage regulator as well
as
the built-in voltage regulator of
the ST72F63B.
Both evaluation boards are designed for two power supply configurations. It can be bus
powered from
the mini-B connector. There is another option available for powering the
board using
the J3 connector. J3 can be used for powering the board from an external
supply. There is a three-pin jumper J4 on the board which selects the power supply
configuration.
www.BDTIC.com/ST