TMC423 Data Sheet – (V1.13 / June 20
th
, 2007)
1/22
TMC 423 – Datasheet
Serial Triple Incremental
Encoder Interface
EXT_RES
NSCS428
SDO428
PRA/IO
NSCS
VCCA
GND
TDI
ENC1_A
ENC1_B
ENC1_N
ENC2_A
TMS
VCCI
GND
ENC2_B
ENC2_N
ENC3_A
SW_ROW_PIN(0)
GND
VKS (GND)
VPP (VCCA)
VCCI
NINT
GND
SDO
SCK
TCK
CLK
SDI
NC
COLUMN_PIN(0)
COLUMN_PIN(1)
COLUMN_PIN(2)
COLUMN_PIN(3)
TRINAMIC Motion Control GmbH & Co. KG
Sternstrasse 67
D – 20357 Hamburg
GERMANY
WWW.TRINAMIC.COM
ENC3_B
ENC3_N
STEP1
TRST
TMC423
TQFP-100 Package
SW_ROW_PIN(1)
SW_ROW_PIN(2)
SW_ROW_PIN(3)
SW_ROW_PIN(4)
SW_ROW_PIN(5)
LED_ROW_PIN(0)
DIR1
VCCI
VSV (VCCA)
VCCI
STEP2
DIR2
LED_ROW_PIN(1)
LED_ROW_PIN(2)
LED_ROW_PIN(3)
LED_ROW_PIN(4)
STEP3
DIR3
LED_ROW_PIN(5)
GND
STOPR(1)
STOPR(0)
STOPR(2)
REF(0)
REF(1)
PRB/IO
REF(2)
VCCI
STOPL(0)
STOPL(1)
TDO
The TMC423 is a triple incremental encoder input chip, which interfaces to any SPI
TM
compatible
controller. The TMC423 can especially be used in conjunction with the TMC428 triple stepper motor
controller to provide position verification or stabilization using some additional software. It integrates
24 bit counters for each encoder to provide a high position resolution without CPU interaction.
Further it allows dynamic resolution adaptation to allow 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 an
optional function. A multiplexer function is also integrated for the TMC428 reference switches.
Furthermore control and drive of a LED and switch matrix is implemented. All functions can also be
used in conjunction.
TMC423 Main Features
Applications
•
•
•
•
•
Stepper Motor Position Verification
Position Maintenance
Incremental Encoder Interface Readout
Step / Direction conversion for TMC428 systems
Control of LED 6 x 4 Matrix and Switch 6 x 4 Matrix
Features
•
•
•
•
•
•
•
•
•
•
Supports 2 and 3 channel incremental encoders with a wide range of resolutions
Allows step / direction signal extraction from TMC428 output data stream
Programmable pulse shaping for step / direction interface
24 bit integrated position resolution
Programmable prescaler for Incremental Encoder Interface
4-times evaluation of encoder signals
Fast 32 bit SPI
TM
interface
Can share SPI
TM
interface with TMC428 and supplies separate interrupt output
Integrates Reference Switch Multiplexers
Package: TQ100
Note: SPI is Trademark of Motorola, Inc.
Copyright © 2004 TRINAMIC Motion Control GmbH & Co. KG
STOPL(2)
SDO_D
SDI_D
GND
SCK_D
NSCS_D
VCCA
GND
NC
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
