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PDF TMC423 Data sheet ( Hoja de datos )
| Número de pieza | TMC423 | |
| Descripción | Serial Triple Incremental Encoder Interface | |
| Fabricantes | TRINAMIC | |
| Logotipo |  |
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TMC423 Data Sheet – (V1.13 / June 20th, 2007)
1/22
TMC 423 – Datasheet
Serial Triple Incremental
Encoder Interface
TRINAMIC Motion Control GmbH & Co. KG
Sternstrasse 67
D – 20357 Hamburg
GERMANY
WWW.TRINAMIC.COM
GND
TDI
ENC1_A
ENC1_B
ENC1_N
ENC2_A
TMS
VCCI
GND
ENC2_B
ENC2_N
ENC3_A
ENC3_B
ENC3_N
STEP1
TRST
DIR1
VCCI
STEP2
DIR2
STEP3
DIR3
TMC423
TQFP-100 Package
COLUMN_PIN(0)
COLUMN_PIN(1)
COLUMN_PIN(2)
COLUMN_PIN(3)
GND
VKS (GND)
VPP (VCCA)
SW_ROW_PIN(0)
SW_ROW_PIN(1)
SW_ROW_PIN(2)
SW_ROW_PIN(3)
SW_ROW_PIN(4)
SW_ROW_PIN(5)
LED_ROW_PIN(0)
VCCI
VSV (VCCA)
LED_ROW_PIN(1)
LED_ROW_PIN(2)
LED_ROW_PIN(3)
LED_ROW_PIN(4)
LED_ROW_PIN(5)
GND
TMC423 Main Features
The TMC423 is a triple incremental encoder input chip, which interfaces to any SPITM 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.
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 SPITM interface
• Can share SPITM 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
1 page  
TMC423 Data Sheet – (V1.13 / June 20th, 2007)
1 Pinout
GND
TDI
ENC1_A
ENC1_B
ENC1_N
ENC2_A
TMS
VCCI
GND
ENC2_B
ENC2_N
ENC3_A
ENC3_B
ENC3_N
STEP1
TRST
DIR1
VCCI
STEP2
DIR2
STEP3
DIR3
TMC423
TQFP-100 Package
Figure 1: Pinout TMC423
5/22
COLUMN_PIN(0)
COLUMN_PIN(1)
COLUMN_PIN(2)
COLUMN_PIN(3)
GND
VKS (GND)
VPP (VCCA)
SW_ROW_PIN(0)
SW_ROW_PIN(1)
SW_ROW_PIN(2)
SW_ROW_PIN(3)
SW_ROW_PIN(4)
SW_ROW_PIN(5)
LED_ROW_PIN(0)
VCCI
VSV (VCCA)
LED_ROW_PIN(1)
LED_ROW_PIN(2)
LED_ROW_PIN(3)
LED_ROW_PIN(4)
LED_ROW_PIN(5)
GND
Copyright © 2004 TRINAMIC Motion Control GmbH & Co. KG
5 Page 
TMC423 Data Sheet – (V1.13 / June 20th, 2007)
11/22
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 provided to the TMC423 by sending
the corresponding SPI telegram. (See 5.3.1 Overview on page 13 in this issue). The TMC423 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
TMC423
SPI Interface
Stepper Motor:
Resolution: e.g.: 12800 steps / rotation
TMC423:
Prescaler = 3.2 -> 1000* 4 * 3.2 = 12800
Figure 6: TMC423 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
encoder signal evaluation is used. (See Figure 10: Encoder Output and Evaluation on page 14).
Microstep
s
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 © 2004 TRINAMIC Motion Control GmbH & Co. KG
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet TMC423.PDF ] | |
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