Freescale Semiconductor MPC5675EVB, User Manual

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MPC5675EVB Users Manual Rev 2.0 July 2010
MPC5675EVB Page 1 of 29
3.1 Power Supply Configuration
The EVB requires an external power supply voltage of 12V DC, minimum 1A. This allows the EVB to
be easily used in a vehicle if required. The single input voltage is regulated on-board using switching
regulators to provide the necessary EVB and MCU operating voltages of 5.0V, 3.3V 1.8v and 1.2V
(257BGA does not have the 1.8v supply). For flexibility there are two different power supply input
connectors on the EVB as detailed below.
3.1.1 Power Supply Connectors
2.1mm Barrel Connector – P4:
This connector should be used to connect the supplied wall-plug mains adapter. Note – if a
replacement or alternative adapter is used, care must be taken to ensure the 2.1mm plug uses the
correct polarisation as shown below:
Figure 3-2 2.1mm Power Connector
2-Way Lever Connector – P1:
This can be used to connect a bare wire lead to the EVB, typically from a laboratory power supply.
The polarisation of the connectors is clearly marked on the EVB. Care must be taken to ensure
correct connection.
Figure 3-3 2-Lever Power Connector
3.1.2 Power Switch (SW1)
Slide switch SW1 can be used to isolate the power supply input from the EVB voltage regulators if
required.
Position 1 will turn the EVB OFF
Position 2 will turn the EVB ON
GND
V+ (12V)
GND
V+ (12V)
GND
V+ (12V)
GND
V+ (12V)