TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15)
8
3 Operation
STEP/DIR inputs control the driver. The TMC2100 works in spreadCycle mode or stealthChop mode. It
provides microstep interpolation and automatic standstill current reduction. ERROR signals driver error
and INDEX signals the microstep table index position (low active open drain outputs).
22n
63V
100n
16V
+VM
Optional use lower
voltage down to 6V
+VM
VS
VSA
5V Voltage
regulator
100n
100n
100µF
charge pump
Full Bridge A
Step&Dir input
with microPlyer
DAC Reference
IREF
5VOUT
100n
4.7µ
2R2
VCC
OA1
OA2
470n
N
stepper
motor
CFG0
CFG1
CFG2
CFG3
CFG4
CFG5
S
Use low inductivity SMD
type, e.g. 1206, 0.5W
Configuration
interface
with TRISTATE
detection
TRISTATE configuration
(GND, VCC_IO or open)
RSA
Driver
BRA
Sequencer
Opt. driver
enable input
B.Dwersteg, ©
TRINAMIC 2014
CFG6_ENN
OB1
OB2
INDEX
ERROR
Full Bridge B
Index pulse
Driver error
Status out
(open drain)
TMC2100
opt. ext. clock
12-16MHz
CLK_IN
VCC_IO
Use low inductivity SMD
type, e.g. 1206, 0.5W
+VIO
RSB
BRB
3.3V or 5V
I/O voltage
100n
Figure 3.1 Standalone operation example circuit
3.1 CFG Pin Configuration
TMC2100 configuration is hard wired. All pins CFG0 to CFG6 are evaluated using tristate detection in
order to differentiate between:
-
-
-
CFG pin tied to GND
CFG pin open (no connection)
CFG pin tied to VCC_IO
CFG6_ENN enables the driver chip. Further, it selects whether standby current reduction is used or not.
CFG6_ENN: ENABLE PIN AND CONFIGURATION OF STANDSTILL POWER DOWN
CFG6
GND
Motor driver enable
Enable
Standstill power down
N
VCC_IO
open
Disable
Enable
Driver disabled.
Y. Motor current ramps down from 100% to 34% in 44M
clock cycles (3 to 4 seconds) after standstill detection (no
step pulse for more than 1M clock). In combination with
stealthChop, be sure not to work with too low overall
current setting, as regulation will not be able to
measure the motor current after stand still current
reduction. This will result in very low motor current after
the stand-still period.
Please refer to Figure 1.2 for more information about standstill power down.
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TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
