CPU_45A-V3
CPU Board XMC4500 General Purpose
Hardware Description
Board User's Manual
10
Revision 1.0, 2014-01-10
2.1
Power Supply
The CPU_45A-V3 board can be powered via the USB plug (5 V); however, there is a current limit that can be
drawn from the host PC through USB. If the CPU_45A-V3 board is used to drive other satellite cards (e.g.
AUT_ISO-V1 or MOT_GPDLV-V2) and the total current required exceeds 500 mA, then the board needs to be
powered by either an external power supply connected to USB or by a satellite card, which supports external
power supply like e.g. AUT_ISO-V1, MOT_GPDLV-V2, COM_ETH-V1.
For powering the board through USB interface, connect the USB cable provided with the kit to the Micro-USB
connector on board.
USB OTG
Debug USB
Power.emf
IFX1763
3.3V Linear
LDO Voltage
Regulator
PowerScale
Probe
Power
indicating
LEDs
Figure 3
Powering option through USB interface (5 V)
To indicate the power status of CPU_45A-V3 board three
LED’s are provided on board (See Figure 3). The LED
will be “ON” when the corresponding rail is powered.
Table 1
P
ower status LED’s
LED Reference Power Rail
Voltage
Note
V401
VDD5
5 V
Must always
be “ON”
V402
VDD5USB
5 V
“ON” if powered by USB plug
V403
VDD3.3
3.3 V
Must always be “ON”
