TMC429-I

The TMC429 is a Small size, cost-effective two-phase stepper motor control chip. It has two independent SPI ports that Can be separately to a microprocessor and a stepper motor driver with an SPI interface to form a complete system. Its control instructions can be given by the microprocessor via the SPI interface. The TMC429 provides all the functions related to digital motion control, including control functions commonly used in stepper motors such as position control, speed control and microstep control. These functions require a large amount of system resources if the microprocessor is to be completed, so its use frees the microprocessor To use resources for the expansion of the interface and the higher level of control of the stepper motor. In addition, TMC236 is also a stepper motor driver with serial interface developed by TrinaMIC. The Daisychain structure consisting of three TMC236 links is a serial communication-based network structure that enables multiple devices with serial communication interfaces to relay data in a relay manner. TMC429, can be connected to them via SPI interface

to simultaneously control three two-phase stepper motors.

The main features of TMC429 are as Characteristics:

● Can control up to 3-axis 2-phase stepper motors and run independently between each axis

● Simple SPI communication with the micro-control chip and driver chip, easy to use, easy to form a virtual closed-loop network, the controller can always know the status of the drive; can also output step / dir control signal

● Wide range of clock frequency, CUP clock frequency can be up to 32MHz

● There is a 24-bit position counter inside

● According to the motor motion parameters (position, speed, acceleration) given by the microprocessor, the drive pulse waveform and sequence are generated by the line according to the speed of the trapezoid or triangle to control the position and speed of the motor. Motor parameters such as speed, acceleration, target position, etc. can be changed while the motor is running.

● Microstep control. Up to 256 segments z

● Programmable current proportional control allows the motor to use different operating currents in different operating conditions. The control motor can work in 8 grades, which are 12.5%, 25%, 37.5%, 50%, 62.5%, 75%, 87.5%, 100% of the maximum current.

● Available in SSOP16, SOP24, and DIL20 packages for different applications

Main performance

Controls 1-3 stepper motors, automatic ramp trajectory generation

Interface with the main controller SPI, simple wiring

Direct connection to standard SPI motor driver ICs, also via step/dir traditional control Can also be controlled by step/dir traditional

IC status is readable, SPI transfer rate programmable up to 1Mbit/S

Wide CPU clock frequency range up to 32MHz

Built-in 24-bit length counter with pulse speeds up to 20kpps

Subdivided optional (1, 2, 4, 8, 16, 32, 64), output sinusoidal current waveform programmable

Parameters can be changed during operation such as: speed, acceleration, position value

"position reached" directly triggers the target position

Output current monitoring

Low power consumption, only 1.25mA at 4MHz CPU

CMOS/TTL level compatible, 3.3V/5V

Package form QFN32, SSOP16, SOP24 optional

Powerful development kit

Application range:

Apply CCTV, security

Antenna positioning

Heliostat controller

Battery powered application

office automation

ATM, cash recycler, POS

Laboratory automation

Liquid treatment

Medical

Printer and scanner

Pump and valve