TMC423 Datasheet, PDF (1/1 Pages) TRINAMIC Motion Control GmbH & Co. KG. – Triple Incremental Encoder Interface and Companion IC for the TMC428

INTERFACE CONTROLLER
INTEGRATED CIRCUITS
TMC423
Triple Incremental
Encoder Interface and
Companion IC for the TMC428
INFO The TMC423 is a triple incremental encoder input chip, which
interfaces to any SPI™ compatible controller. It integrates 24 bit
counters – one for each encoder – to provide a high position
resolution without CPU interaction. The TMC423 is intended as a
companion chip for the TMC428 but not limited to this. Both ICs
together enable the realization of a motion control system of
three axis with encoder feedback. This provides position verifica-
tion or stabilization by implementation of some additional soft-
ware. Further, the TMC423 allows dynamic resolution adaptation
for direct comparison of encoder counters with motors using
different micro step resolution.
All encoder counters can be latched synchronously, or whenever
a null channel event occurs, providing a position on strobe
holding function. The TMC423 also provides a step / direction
output with programmable signal shaping for the TMC428
as well as a multiplexer function for the TMC428 reference
switches. Additionally, the TMC423 can drive an LED matrix and
read out a switch matrix, to support systems with keyboard user
interaction.
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6x4 LED
6x4 Key
stop
switches
TMC423
3
Matrix
control
6
3x
Encoder
Interface
Ref.
Demux
3x
SPI
step/dir
converter
SPI
to µC
3
µC
REF
switches
Motion
Controller
e.g. TMCM428
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MAIN CHARACTERISTICS
• incremental encoder interface for three
2 or 3 channel encoders
• TMC428 step / direction interface
extension
• TMC428 reference switch interface
• TMC428 interrupt de-multiplexer
• control of LED 6 x 4 Matrix
• control of key 6 x 4 matrix
INTERFACE • SPI interface to microcontroller
ELECTRICAL • 2.5V and 5V supply required
DATA
• 20mA LED driver outputs
• 5V CMOS / TTL compatible IOs
PACKAGE • TQFP100
• RoHS compliant
ORDER CODE
TMC423
DESCRIPTION
3-axis encoder interface TQFP100 package
www.trinamic.com – for detailed information and datasheets
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