UM1537 datasheet(19/52 Pages) STMICROELECTRONICS

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UM1537

Hardware layout and configuration

Doc ID 023059 Rev 1

19/52

2.16

IR LED and IR receiver

The IR receiver TSOP34836 is connected to PB3 of the STM32F051R8T6 and a current

around 100 mA on the IR LED is driven by PB9 through transistors T1 and T2 on the board.

Note:

The IR LED may be driven by PB9 directly with a 20 mA current when SB3 is closed and

R11 is removed.

2.17

Motor control

The STM320518-EVAL evaluation board supports both asynchronous and synchronous

three-phase brushless motor control via a 34-pin connector CN1. This connector provides

all required control and feedback signals to and from the motor power-driving board.

Available signals on this connector include emergency stop, motor speed, 3-phase motor

current, bus voltage, heatsink temperature coming from the motor driving board and six

channels of the PWM control signal going to the motor driving circuit.

Some PCB reworks are required for the motor control application to disconnect peripherals

that share IOs with the motor control connector. These IOs need to be connected to the

motor control connector.

●

Remove resistors R89, R52, R19, R55, R32, R38, R42, R88, R83, R20, R36, R18 and

R50.

●

Mount R25, R29, R30, R39, R4, R35, R37, R44, R22 and R41 with a 0 ohm resistor.

All resistors to be removed are marked in red while resistors to be soldered are marked in

green in Figure 5.

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