TMC246/A ETC2 [List of Unclassifed Manufacturers], TMC246/A Datasheet - Page 7

• Manufacturer Part Number: TMC246/A
• Description: High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnosis and SPI Interface
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005)
Control via the SPI Interface
The SPI data word sets the current and polarity for both coils. By applying consecutive values,
describing a sine and a cosine wave, the motor can be driven in microsteps. Every microstep is
initiated by its own telegram. Please refer to the description of the analog mode for details on the
waveforms required. The SPI interface timing is described in the timing section. We recommend the
TMC428 to automatically generate the required telegrams and motor ramps for up to three motors.
Serial data word transmitted to TMC246
(MSB transmitted first)
Bit
Serial data word transmitted from TMC246
(MSB transmitted first)
Bit
Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG
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2
1
0
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1
0
Name
MDA
CA3
CA2
CA1
CA0
PHA
MDB
CB3
CB2
CB1
CB0
PHB
Name
LD2
LD1
LD0
1
OT
OTPW temperature prewarning
UV
OCHS
OLB
OLA
OCB
OCA
Function
mixed decay enable phase A
current bridge A.3
current bridge A.2
current bridge A.1
current bridge A.0
polarity bridge A
mixed decay enable phase B
current bridge B.3
current bridge B.2
current bridge B.1
current bridge B.0
polarity bridge B
Function
load indicator bit 2
load indicator bit 1
load indicator bit 0
always “1”
overtemperature
driver undervoltage
overcurrent high side
open load bridge B
open load bridge A
overcurrent bridge B low side
overcurrent bridge A low side
Remark
“1” = mixed decay
MSB
LSB
“0” = current flow from OA1 to OA2
“1” = mixed decay
MSB
LSB
“0” = current flow from OB1 to OB2
Remark
MSB
LSB
“1” = chip off due to overtemperature
“1” = prewarning temperature exceeded
“1” = undervoltage on VS
3 PWM cycles with overcurrent within 63 PWM cycles
no PWM switch off for 14 oscillator cycles
no PWM switch off for 14 oscillator cycles
3 PWM cycles with overcurrent within 63 PWM cycles
3 PWM cycles with overcurrent within 63 PWM cycles
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