Datasheet
TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15) 8
www.trinamic.com
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).
VCC_IO
TMC2100
Step&Dir input
with microPlyer
STEP
DIR
5V Voltage
regulator
charge pump
22n
63V
100n
16V
CLK_IN
+V
M
5VOUT
VSA
4.7µ
+V
IO
GNDP
GNDA
TST_MODE
DIE PAD
VCC
opt. ext. clock
12-16MHz
3.3V or 5V
I/O voltage
100n
100n
Sequencer
Full Bridge A
Full Bridge B
+V
M
VS
stepper
motor
N
S
OA1
OA2
OB1
OB2
Driver
100n
BRB
100µF
CPI
CPO
BRA
R
SA
Use low inductivity SMD
type, e.g. 1206, 0.5W
R
SB
100n
VCP
Optional use lower
voltage down to 6V
2R2
470n
DAC Reference
AIN_IREF
IREF
Use low inductivity SMD
type, e.g. 1206, 0.5W
Status out
(open drain)
Configuration
interface
with TRISTATE
detection
CFG0
CFG1
CFG3
CFG2
ERROR
INDEX
TRISTATE configuration
(GND, VCC_IO or open)
Index pulse
Driver error
CFG4
CFG5
CFG6_ENN
Opt. driver
enable input
GNDD
B.Dwersteg, ©
TRINAMIC 2014
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
Motor driver enable
Standstill power down
GND
Enable
N
VCC_IO
Disable
Driver disabled.
open
Enable
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.