About the use of ST's stepper motor driver chip L9942

wxkang

About the use of ST's stepper motor driver chip L9942 [Copy link]

I read the chip's manual, but I still can't understand how to set the logic for load current limit. There is only one picture in the manual. Has anyone used this chip?

wxkang

fxyc87

The official manual clearly states it, see the picture

Through the SPI interface, set register 1, the current from 100mA to 1.5A

Official website information

https://www.st.com/zh/automotive-analog-and-power/l9942.html

wxkang

fxyc87 posted on 2022-3-17 19:41 The official manual clearly states that through the SPI interface, set register 1, the current from 100mA to 1.5A official...

I mean the values of DAC phase A and DAC phase B come from other registers I0~I4. How can I set which register's I0~I4 to use?

okhxyyo

Has the landlord's problem been solved?

wxkang

okhxyyo posted on 2022-3-18 09:37 Has the original poster's problem been solved?

No, I don’t know how to use it. Are you using this one too?

215661599

Has the original poster's problem been solved? I'm new to this chip and I'm confused.