Table 5. Low Voltage Limitation - STMicroelectronics STM32G081B-EVAL User Manual

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Table Of Contents

Table of Contents

Hardware layout and configuration

Jumper

The Vbat pin of STM32G081RBT6 is connected to VDD when JP15 is set as shown on the right

(default setting):

JP15

The Vbat pin of STM32G081RBT6 is connected to 3V battery when JP15 is set as shown on the

right:

The VDD pin of STM32G081RBT6 is connected to 3.3V when JP16 is set as shown on the right

(default setting), when the UCPD daughterboard is used, this setting is mandatory:

JP16

The VDD pin of STM32G081RBT6 is connected to VDD_ADJ when JP16 is set as shown on the

right:

Note:

The VDD_MCU Idd measurement can be done by current meter which mounted on JP11

when it is open. But JP11 is not allowed to be opened without current meter; otherwise

STM32G081RBT6 would be damaged due to lacking of power supply on its power pins.

Note:

LD8 is lit when VDD < 2.7 V and in this case IOs and some Analog IPs of STM32G081RBT6

work with degraded performances.

Note:

The UCPD daughterboard works with VDD=3.3V, so it is mandatory to close JP16 pin1 and

pin2.

The LED LD7 is lit when the STM32G081B-EVAL Evaluation board is powered by the 5V

correctly.

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.

Board

Mother board

Legacy daughterboard Smartcard

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Table 4. Power source related Jumpers (continued)