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4.1
MCU Power
4.1.1
Supply Routing and Jumpers
The different MCU supply inputs are connected to the regulators on the motherboard through the
interface connector. Figure 13 shows how the MCU power domains are connected to the regulators.
VBat
1.25V
Switcher
3.3V
Switcher
5V
Switcher
5V Linear
From Mother Board
(Default Connection)
5V
3.3V
1.25V
From Daughter Card
The connection of any power domain to a regulator has to be enabled by a dedicated jumper as described
in Table 8.
J2
J5
J3
J7
Figure 13. Daughter card power distribution
S32R274 EVB User Guide
1V25
All LV Supplies
in External
Mode only
3V3_SR
All Other Digital
HV Supplies
3V3_SR
LDO
VDD_HV_REG3V8
3V3_LR
LDO
VDD_HV_DAC
3V3_LR
LDO
VDD_HV_RAW
VDD_HV_ADCREF0/2
MCU Power
17
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