Users Manual

Motor Control connector CN22 STM32MP157xAA3 microcontroller

Terminal

Terminal name

Port

name

Function

Alternate

function

Board configurations to

enable Motor Control

22 GND - - - -

23 Dissipative Brake PH6 TIM12_CH1

GPIO12_TIM12_CH

Close MB1262/SB29

24 GND - - - -

25 5V - - - -

26 Heatsink Temp. PF11 ADC_1_IN2 SAI_2_SD_B

Close MB1262/SB70

Open MB1262/SB8 and SB69

27 PFC Sync PE0 TIM4_ETR SAI_2_MCLK_A

Close MB1262/SB53

Open MB1262/SB7

28 3V3 - - - -

29 PFC PWM PB8 TIM4_CH3 DCMI_D6 Close MB1262/SB24

30 GND - - - -

31 Encoder A PH10 TIM5_CH1 DCMI_D1 Close MB1262/SB28

32 GND - - - -

33 Encoder B PH11 TIM5_CH2 DCMI_D2 Close MB1262/SB30

34 Encoder Index PH12 TIM5_CH3 DCMI_D3 Close MB1262/SB26

Figure 24. Motor control connector MB1262/CN22

6.27.2 Limitations

Due to the share of some IO of STM32MP157xAA3 by multiple peripherals, the following limitations apply in using

the Motor control features:

The Motor control may not be operated simultaneously with the camera, audio Codec, CAN and GPIO

expansion (GPIO6, 7 and 12).

6.28 GPIO 40-pin expansion connector

A 2x20-pin, 2.54 mm, GPIO connector is implemented on MB1262/CN21.

28 pins are GPIO, 8 are GND, 2x 5V DC and 2x 3V3 DC are provided on this connector.

This GPIO 40-pin expansion connector has a Raspberry Pi shields support capability.

Figure 25. MB1262/CN21 connector

Please note the pin1 position that is on the bottom right on MB1262/CN21.

UM2535

GPIO 40-pin expansion connector

UM2535 - Rev 2

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