TMC428 ETC-unknow, TMC428 Datasheet - Page 29

• Manufacturer Part Number: TMC428
• Description: Intelligent Triple Stepper Motor Controller With Serial Peripheral Interfaces
• Manufacturer: ETC-unknow

TMC428 DATA SHEET (V. 1.00 / February 12, 2001)
Simultanous Start of up to Three Stepper Motors
Starting stepper motors simultanously can be achifed by sending successive datagrams starting the stepper
motors. If the delay between those datagrams is of the magnitude of some micro seconds, the stepper
motors can be considered as started simultanously. Feedding the reference switch signals through the
microcontoller (Figure 14) allows exact simultanous start of the stepper motors under software control.
Figure 14 - Reference Switch Soft Control for Exact Simultanous Stepper Motor Start
Figure 15 - Reference Switch Soft De-Multiplexing and Soft Control for six Reference Switches
Copyright © 2000, TRINAMIC Microchips GmbH
TRINAMIC
M I C R O C H I P S
input port
input port
µC
µC
output port
output port
CLK
CLK
MOSI
MISO
SCK
SS
MOSI
MISO
SCK
SS
nSCS_C
SDI_C
SCK_C
SDO_C
nSCS_C
SDI_C
SCK_C
SDO_C
CLK
CLK
REF1
V33
TMC428
REF1
V33
REF2
TMC428
V5
REF2
REF3
TEST
V5
REF3
TEST
GND
nSCS_S
SDO_S
SCK_S
GND
SDI_S
nSCS_S
SDO_S
SCK_S
SDI_S
1K
1K
1K
1K
1K
1K
1K
1K
Reference Switches
(active high)
1K
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