Hi team,
Issues:
1. The minimum value of the VM on this chip is 4.5 V, is it proper for the VM to connect to 5 V if driving a 5 V stepper motor (4.9 V, 7 ohm, 0.7 A)? Is the voltage margin too small?
2. Chapter 6.5 of the spec specifies the high-impedance input Hi-Z for M0, M1, DECAYx, TOFF, specifying that under the input mode, the input level should be between 1.8-2.2V (VM=24V). So with this high-impedance input, is it necessary for the MCU to output voltages within this range for the 8424 to be recognized as high-impedance? Can it just leave M0, M1, DECAYx, TOFF floating?
3. Continuing with point 2, if floating is not allowed, when the MCU output cannot meet the M0, M1 high-impedance input voltage, how to achieve the "high-impedance input" described in the 8424 spec?
4. Continuing with point 2, what is the range of high-impedance input level requirements for M0, M1, DECAYx, TOFF when VM = 5V?
Could you help check with this case? Thanks.
Best Regards,
Cherry
