NXP PCA9629 Fm+ I2C-Bus Stepper Motor Controllers
NXP's PCA9629 Fm+ I2C-Bus Stepper Motor Controllers are I2C-bus
controlled low-power CMOS devices that provide all the logic and
control required to drive a four phase stepper motor. PCA9629 is
intended to be used with external high current drivers to drive the
motor coils. Three stepper motor drive formats are supported: one-phase
(wave drive), two-phase, and half-step. In addition, when used as
inputs, four General Purpose Input/Outputs (GPIOs) allow sensing of
logic level output from optical interrupter modules and generate active
LOW interrupt signal on the INT pin of PCA9629. This is a useful feature
in sensing home position of motor shaft or reference for step pulses.
Upon interrupt, the PCA9629 can be programmed to automatically stop the
motor or reverse the direction of rotation of motor.