Power Modes; Table 4. Power Mode Related Jumpers; Table 5. Low Voltage Limitations - ST STM32373C-EVAL User Manual

Hardware layout and configuration
2.3

Power modes

A total of three power modes are supported on the board and can be configured by setting
the related jumpers JP12 and JP13 as described below in
follows:
●
Power mode 1: VDD and VDDA are connected together and powered by a fixed 3.3-V
DC power supply.
● Power mode 2: VDD and VDDA are connected together and powered by an adjustable
voltage that ranges from 2.0 V to 3.6 V.
●
Power mode 3: VDD is powered by an adjustable voltage that ranges from 2.0 V to
3.6 V while VDDA is powered by a fixed 3.3-V DC power supply.
Table 4.
Power mode
Power mode 1
Power mode 2
Power mode 3
1. To measure the IDD of the microcontroller, use a current meter mounted on JP15 (which must be open).
JP16 must also be open to disconnect VDDA from any analog power (VDD_ANA) connected to the analog
circuit.
Table 5 shows the low voltage limitations that might apply depending on the characteristics
of some peripheral components. Components might work incorrectly when the power level
is lower than the limitation.
Table 5.
Peripheral
MicroSD card
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Power mode related jumpers
Low voltage limitations
Component
USB
CAN
Doc ID 023566 Rev 1
Power mode configuration
JP12
1 2 3
1 2 3
1 2 3
1 2 3
CN16
CN7
CN5
Table 4. The power modes are as
Microcontroller IDD
measurement
JP13
1 2 3
1 2 3
1 2 3
1 2 3
Low voltage
IO name
USB
SPI3
CAN
UM1564
(1)
OK
Not allowed
OK
Not allowed
limitation
3 V
2.7 V
3 V