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| INTERFAC E C O N T R O L L E R I N T E G R A T E D C I R C U ITS TM C4 23 Trip le Incre mental Enc oder Int erface a nd Com panion I C for th e TMC428 M A IN CH A R AC T ER IS T IC S INFO The TMC423 is a triple incremental encoder input chip, which interfaces to any SPITM 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 verification or stabilization by implementation of some additional software. 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 PACKAGE INTERFACE ELECTRICAL DATA * 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 * SPI interface to microcontroller * 2.5V and 5V supply required * 20mA LED driver outputs * 5V CMOS / TTL compatible IOs * TQFP100 * RoHS compliant 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. TMC423 1-3 1-3 3x Encoder Encoder Encoder 3 6x4 LED 6x4 Key 3x Encoder Interface SPI to C C Matrix control Motion Controller 3 stop switches 6 Ref. Demux 3x step/dir converter REF switches e.g. TMCM428 SPI 3x 3x 3x Driver Driver Driver step/dir step/dir step/dir OR DE R C O DE D E S C RI P T I ON TMC423 3-axis encoder interface TQFP100 package www.trinamic.com - for detailed information and datasheets 10 |
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