Motherboard Power Supply Connectors; Regulator Power Jumpers - NXP Semiconductors S32R274 EVB User Manual

3.1.1

Motherboard Power Supply Connectors

2.1mm Barrel Connector – P26:
Figure 3.
Screw Terminal Power Connector – P33:
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 (Pin 1 = +12v). Care must be taken to
ensure correct connection.
Figure 4.
3.1.2

Regulator Power Jumpers

There are four power regulator circuits on the MPC57xx motherboard that supply the required voltages
to operate the MCUs:
• 1.25V_SR: 1.25V switching regulator to supply the core voltage
• 5V_SR: 5V switching regulator to supply the power management controller, I/O and peripherals
• 3.3V_SR: 3.3V switching regulator for Ethernet, FlexRAY, debug and I/O
• 5V_LR: 5V linear regulator for ADC supply and reference
Figure 3. 2.1mm Power Connector
Figure 4. Screw Terminal Power Connector
S32R274 EVB User Guide
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