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
42 8
T hr e e A x i s
S t e p p e r M ot o r C o n t r o l l e r
w i t h I n t e gr 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 RIP TIO 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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