Power Requirements
PHYTEC Messtechnik GmbH 2005 L-645e_1
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Power Requirements
The phyCORE-MCF548x must be supplied with one supply voltage
only:
Supply voltage: +3.3 V
±
10 % with 1A load
Caution:
Connect all +3V3 input pins to your power supply and at least the
matching number of GND pins neighboring the +3V3 pins.
As a general design rule we recommend connecting all GND pins
neighboring signals which are being used in the application circuitry
Optional Supply Inputs VIN5V and VBAT:
VIN5V is used as an alternative 5 V supply voltage for the CAN
transceivers populating U10 and U11. VIN5V is connected to the
applicable supply pin on these devices by closing Jumper J36 at
position 2+3. The standard version of the phyCORE module uses
Texas Instruments SN65HVD230 CAN transceivers that are supplied
with +3V3 (J36 = 1+2).
VBAT is the input pin that supplies the internal power down voltage
VPD. VBAT is connected over two schottky diodes (D10 and D11) to
VPD. VPD is also connected over a schottky diode (D9) to +3V3. As
long as +3V3 is applied, VPD will be fed t3V3. Do not apply
any voltage source to the VPD pin. This is an output signal. VPD is
used to supply the Real-Time Clock U13 and the serial memory
device U15 if J7 is closed at position 2+3. VBAT should be supplied
from a 3 V source.
Summary of Contents for phyCORE-MCF548x
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Page 104: ...Published by PHYTEC Messtechnik GmbH 2005 Ordering No L 645e_1 Printed in Germany ...