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PDF TMC424 Data sheet ( Hoja de datos )
| Número de pieza | TMC424 | |
| Descripción | Serial Triple Incremental Encoder Interface | |
| Fabricantes | TRINAMIC | |
| Logotipo |  |
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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
GND
1
ENC1_A
ENC1_B
ENC1_N
ENC2_A
ENC2_B
ENC2_N
GND
ENC3_A
ENC3_B
GND
ENC3_N
VCORE
STEP1
VCORE
VCCI
DIR1
STEP2
DIR2
STEP3
DIR3
VCC
GND
25
TMC424
TQFP-100 Package
75 GND
VCC
VCORE
GND
VCCI
CLK
VCC
TRST
TDO
VCC
51 GND
TMC424 Main Features
The TMC424 is a triple incremental encoder input chip, which interfaces to any SPITM 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 SPITM interface
Can share SPITM interface with TMC429 and supplies separate interrupt output
Integrates Reference Switch Multiplexers
Package: TQ100
Note: SPI is Trademark of Motorola, Inc.
Copyright © 2011 TRINAMIC Motion Control GmbH & Co. KG
1 page  
TMC424 Datasheet – (V1.04 / 2015-JUL-01)
1 Pinout
GND
1
ENC1_A
ENC1_B
ENC1_N
ENC2_A
ENC2_B
ENC2_N
GND
ENC3_A
ENC3_B
GND
ENC3_N
VCORE
STEP1
VCORE
VCCI
DIR1
STEP2
DIR2
STEP3
DIR3
VCC
GND
25
TMC424
TQFP-100 Package
Figure 1: Pinout TMC424
5/21
75 GND
VCC
VCORE
GND
VCCI
CLK
VCC
TRST
TDO
VCC
51 GND
Copyright © 2011 TRINAMIC Motion Control GmbH & Co. KG
5 Page 
TMC424 Datasheet – (V1.04 / 2015-JUL-01)
11/21
4 Dynamic Resolution Adaptation
The dynamic resolution adaptation is needed to link stepper motors and encoders with different
resolutions. The characteristics of the connected hardware must be provided to the TMC424 by sending
the corresponding SPI telegram. (See 5.3.1 Overview on page 13 in this issue). The TMC424 multiplies
the encoder counter by a user selectable value in the range 1..1024, and then divides it by 16. When
using incremental encoders with N channel it is also possible to select between different behaviors
when the N channel is triggered.
Encoder:
Resolution: e.g.: 1000 steps / rotation
Stepper
motor
TMC424
SPI Interface
Stepper Motor:
Resolution: e.g.: 12800 steps / rotation
TMC424:
Prescaler = 3.2 -> 1000* 4 * 3.2 = 12800
Figure 6: TMC424 Application
Table 4 shows a number of prescaler factors for possible combinations of micro step resolution and
encoder resolution. Note: The given number of pulses have to be multiplied by four since 4-times
Step
Channel A
Channel B
Channel N
Evaluation
encoder signal evaluation is used. (See
Figure 10: Encoder Output and Evaluation on page 14).
Microsteps
12800
6400
3200
1600
800
400
1024
3.125
1.5625
----
----
----
----
1000
3.2
1.6
----
----
----
----
Encoder Resolution [Pulses / Rotation]
512 500 256 250 200 125
6.25 6.4 12.5 12.8 16 25.6
3.125 3.2 6.25 6.4
8 12.8
1.5625 1.6 3.125 3.2 4 6.4
---- ---- 1.5625 1.6 2 3.2
---- ---- ---- ---- 1 1.6
---- ---- ---- ---- ---- ----
Table 4: Prescaler factors for different motors and encoders
50
64
32
16
8
4
2
25
----
64
32
16
8
4
Copyright © 2011 TRINAMIC Motion Control GmbH & Co. KG
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet TMC424.PDF ] | |
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