TMC424 Datasheet TMC424 | P1-P3

TMC424 Datasheet – (V1.04 / 2015-JUL-01) 1/21

TMC424 – Datasheet

Serial Triple Incremental

Encoder Interface

TRINAMIC Motion Control GmbH & Co. KG

Waterloohain 5

D – 22769 Hamburg

GERMANY

WWW.TRINAMIC.COM

TMC424 Main Features

The TMC424 is a triple incremental encoder input chip, which interfaces to any SPI

compatible

controller. The TMC424 can especially be used in conjunction with the TMC429 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 a 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 TMC424

also provides a step / direction output with programmable signal shaping for the TMC429 as an

optional function. A multiplexer function is also integrated for the TMC429 reference switches. All

functions can also be used in conjunction.

Applications

 Stepper Motor Position Verification

 Position Maintenance

 Incremental Encoder Interface Readout

 Step / Direction conversion for TMC429 systems

Features

 Supports 2 and 3 channel incremental encoders with a wide range of resolutions

 Allows step / direction signal extraction from TMC429 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

interface

 Can share SPI

interface with TMC429 and supplies separate interrupt output

 Integrates Reference Switch Multiplexers

 Package: TQ100

Note: SPI is Trademark of Motorola, Inc.

SDO

SCK

SDI

SDO429

NSCS

NINT

NSCS429

GND

EXT_RES

VCORE

SDI_D

SDO_D

NSCS_D

SCK_D

REF2

REF1

VCCI

STOPR0

GND

STOPR2

REF0

STOPR1

STOPL0

STOPL1

STOPL2

TDI

TMC424

TQFP-100 Package

GND

ENC1_A

ENC1_B

ENC1_N

ENC2_A

GND

ENC2_B

ENC2_N

ENC3_A

ENC3_B

ENC3_N

STEP1

DIR1

VCCI

STEP2

DIR2

STEP3

DIR3

VCORE

GND

TCK

TMS

TDO

TRST

VCC

CLK

VCCI

VCC

GND

VCC

VCCI

ENC_INV

VCC

GND

VCORE

VCC

100

GND

TMC424 Datasheet – (V1.04 / 2015-JUL-01) 2/21

Revision History

Version

Comment

Date

Name

1.0

Derived from TMC423 rebirth datasheet V1.4

June 24, 2010

1.01

Added Pin12 (GND) to Table 1

October 14, 2010

1.02

Added internal Pull-Up/-Down

resistors to Table 1

February 1, 2011

1.03

Updated to TMC429 and TMC26x

June 30, 2011

1.04

Warning hint for chamfered corner in IC

package is not pin 1 reference

2015-JUN-01

TMC424 Datasheet – (V1.04 / 2015-JUL-01) 3/21

Table of Contents

1 Pinout .............................................................................................................................................................................. 5

1.1 Pin Description ..................................................................................................................................................... 6

1.2 Recommended Operating Conditions ............................................................................................................ 7

1.3 Electrical Characteristics ..................................................................................................................................... 7

2 Block Diagram ............................................................................................................................................................... 8

3 Application Environment ............................................................................................................................................ 9

3.1 Application Description ...................................................................................................................................... 9

3.1.1 Application with TMC26x Stepper Motor Driver (SPI controlled) ..................................................... 9

3.1.2 Application with Step/Direction controlled TMC26x ............................................................................ 9

3.2 Application Examples........................................................................................................................................ 10

3.2.1 Application with TMC6x Stepper Motor Driver .................................................................................... 10

3.2.2 Application with Step/Direction Power Stage ..................................................................................... 10

4 Dynamic Resolution Adaptation ............................................................................................................................. 11

5 Serial Peripheral Interface (SPI) with 32-bit Register ...................................................................................... 12

5.1 Description and Specification......................................................................................................................... 12

5.2 32-bit SPI Datagram Structure ....................................................................................................................... 13

5.3 SPI 32-bit Datagram Specification ................................................................................................................ 13

5.3.1 Overview ........................................................................................................................................................ 13

6 Incremental Encoder ................................................................................................................................................. 14

7 Configuration Datagrams ......................................................................................................................................... 15

7.1 Encoder Interface Prescaler and Null Event Configuration .................................................................... 15

7.2 Encoder Interface Hold Register Operation................................................................................................ 16

7.3 Timer Logic Step Pulse Length and Delay ................................................................................................. 17

7.4 Control Register and Interrupt Control ....................................................................................................... 17

7.5 N-Channel Read Back ........................................................................................................................................ 17

8 SPI-Protocol for Interface with 6-bit Register .................................................................................................... 18

8.1 Step and Direction Pulse conversion ........................................................................................................... 18

9 Package dimensions .................................................................................................................................................. 19

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21

TMC424

Mfr. #:

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IC ENCODER SPI 100TQFP

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