TMC423 Data Sheet – (V1.13 / June 20th, 2007)
10/22
3.2 Application Examples
3.2.1 Application with TMC236 Stepper Motor Driver
This example illustrates the encoder connection and the use of reference switches with the TMC423
and additionally the SPI interface connections between TMC423, TMC428 and a microcontroller. The
communication to the drivers (e.g. TMC236) is performed via SPI by the TMC428 motion control chip.
+5V
16MHz
CLK
V5
V33
16MHz
10k each
CLK
RESET
+5V
REF1
REF2
REF3
REF1
REF2
REF3
470nF
Test
GND
ENC1_A
ENC1_B
ENC1_N
SDI
SCK
SDO
GND
TMC428
NSCS
SDI_C
SDI_S
SCK_S
SDO_S
nSCS_S
SPI
to
Drivers
ENC2_A
ENC2_B
ENC2_N
SCK_C
SDO_C
nSCS_C
SDO428
NSCS428
TMC423
ENC3_A
ENC3_B
ENC3_N
+5V
10k
+5V
to nSCS_D
of TMC423
TRST
TMS
+2.5V
VCCI1 - VCCI5
µC
from nSCS_S
of TMC428
VCCA1 - VCCA4
GND1 - GND8
SDI_D
SW_ROW0 - SW_ROW5
SCK_D
NSCS_D
Notes:
NC2
NC1
TCK
TDI
1. Application without LED and Switch matrix.
6x Reference Switch
Inputs (active high)
2. If the NSCS428 pin is not in use it has to be tied to +5V.
3. NSCS_D activates the reference switches (inputs
STOPRx/STOPLx and outputs REFx).
STOPR0 - STOPR2
STOPL0 - STOPL2
10k
10k
GND
GND
Figure 4: Example for Application with TMC236 Stepper Motor Driver
3.2.2 Application with Step / Direction Power Stage
Additionally to the previous example the use of the TMC423 as step/direction converter is shown. The
reference switches can be used as above.
µC
16MHz
10k each
CLK
RESET
+5V
TMC428
NSCS
SDO
SCK
SDI
+5V
SCK_C
SDI_C
V5
ENC1_A
ENC1_B
ENC1_N
16MHz
CLK
SDO428
NSCS428
SDO_C
nSCS_C
V33
ENC2_A
ENC2_B
ENC2_N
SDI_D
SCK_D
SDO_D
NSCS_D
SDO_S
SCK_S
SDI_S
470nF
Test
GND
nSCS_S
ENC3_A
ENC3_B
ENC3_N
GND
TMC423
STEP1
DIR1
STEP2
DIR2
STEP3
DIR3
+5V
Step/DIR
to
Drivers
+2.5V
VCCI1 - VCCI5
VCCA1 - VCCA4
+5V
10k
SDI_D
SCK_D
GND1 - GND8
Notes:
1. Application without LED/switch matrix and
reference switches.
2. If the NSCS428 pin is not in use, it has to be tied
to +5V.
SW_ROW3 - SW_ROW5
TRST
TMS
NC2
NC1
TCK
TDI
STOPR0 - STOPR2
STOPL0 - STOPL2
GND
GND
Figure 5: Example for Application with Step / Direction Power Stage
Copyright © 2004 TRINAMIC Motion Control GmbH & Co. KG
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
