马达控制，moto的专用芯片，比用CPU要好，简洁-Introduction

The AMIS− 30512 is a micro− stepping stepper motor driver for

bipolar stepper motors. The chip is connected through I/O pins and a

SPI interface with an external microcontroller. It has an on− chip

voltage regulator, reset− output and watchdog reset, able to supply

peripheral devices. The AMIS− 30512 contains a current− translation

table and takes the next micro− step depending on the clock signal on

the “NXT” input pin and the status of the “DIR” (=direction) register

or input pin. The chip provides a so− called “speed and load angle”

output. This allows the creation of stall detection algorithms and

control loops based on load− angle to adjust torque and speed. It is

using a proprietary PWM algorithm for reliable current control.

The AMIS− 30512 is implemented in I2T100 technology, enabling

both high− voltage analog circuitry and digital functionality on the

same chip. The chip is fully compatible with