Page 420 - ARM Based Microcontroller Projects Using MBED

406 17. STM32 NUCLEO EXPANSION BOARDS

FIG. 17.1 X-NUCLEO-IHM03A1 expansion board.

• power OK and fault LEDs
• up to 1/128 microstepping
• programmable speed profile and overcurrent protection
• sensorless stall detection
• adjustable output slew rate
• overtemperature protection

17.3 TWO-AXIS STEPPER MOTOR BOARD (X-NUCLEO-IHM02A1)

This is a two-axis stepper motor driver expansion board (Fig. 17.2) based on two L6470
motor driver chips. The board is equipped with Arduino UNO R3 connectors. The board
can drive one or two stepper motors through USART interface. The basic features of this ex-
pansion board are as follows:

•8–45V operating voltage
• 7A peak (3A rms) output current for each motor driver
• USART communication with a PC
• SPI interface that may be connected in a daisy chain configuration
• five LEDs to indicate power, busy, and fault conditions