MOT I O N C O N T R O L L E R
I N T E GR A T E D C I R C U ITS
TMC
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T h r e e A xi s
S t e p p e r M o t o r C on t r o l l e r
w i t h I n t e g r a t e d S e q u e n c er
M A IN CH A R AC T ER IS T IC S
INFO
The TMC428 is a revolutionary miniaturized low cost and high
performance stepper motor controller for up to three motors.
It integrates all real time critical tasks in reliable, dedicated
hardware: An integrated motion ramp profile generator as well
as an adaptable microstep sequencer with microstep RAM table.
Advanced stop- and reference switch handling allows for precise
and fast referencing as well as on-the-fly position checking.
Automatic motor current control gives high motor dynamics
while saving energy. The interrupt output can generate precise
position pulses. The TMC428 directly connects to SPI™ drivers
or to step-/direction drivers. A second SPI™ interface allows
communication with a host microcontroller. The host microcon-
troller just needs to do high-level control tasks, e.g. giving the
command: Drive motor 2 to position 1000. The TMC428 then
automatically calculates the motion ramp based on velocity and
acceleration parameters. The TMC423 adds encoder functionality
to the TMC428. Evaluation Boards, application notes, spread-
sheets for parameter calculation, C code examples and schema-
tics are available in order to support short design-in times.
ELECTRICAL
DATA
INTERFACE
• unique minaturized stepper motor
controller realized as low power 0.35µ
CMOS device
• up to three stepper motors
• up to 64 times microstepping
• full step frequencies up to 20 kHz
• alteration of parameters at any time
• driver status information
read back for µC
• power down mode
• ideally suited motor drivers are TMC236,
TMC239, TMC246 and TMC249
• SPI™ µC interface
• easy-to-use protocol for µC
• serial 4-wire driver interface (SPI™)
• step-/direction output
• 3.3V or 5V operation
• CMOS / TTL compatible IOs
PACKAGE
• miniature SSOP16 package
• SO24 package available
• RoHS compliant
REF 1,2,3
TMC428
Interrupt
controller
Ramp-
&
Pulse-
generator
Microstep-
Controller
(incl.
sequencer)
to driver
CLK
SPI
to µC
SPI
serial
interface
µC
interface
Driver
serial
to driver
SPI
10 mm
3,3..5V DC
RAM
to driver
SPI
ORDER CODE
DESC R IP T IO N
TMC428-I
TMC428-PI24
TMC428A-EVAL
3-axis controller SSOP16-package
3-axis controller SOP24-package
Evaluation board for TMC428, TMC246 and TMC249 with stallGuard™
www.trinamic.com
– for detailed information and datasheets
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TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
