Datasheet
TMC220X, TMC222X DATASHEET (Rev. 1.02 / 2017-MAY-16) 8
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2 Pin Assignments
The TMC22xx family comes in a number of package variants in order to fit different footprints. Please
check for availability.
2.1 Package Outline TMC2208
OB2
ENN
GND
CPO
-
OB1
BRA
CLK
INDEX
MS2
DIAG
STEP
VREF
GND
DIR
-
OA2
CPI
VCP
PDN_UART
MS1
5VOUT
OA1
-
BRB
VS
VS
VCC_IO
1 2 3 4 5 6 7
21201918171615
22232425262728
141312111098
TMC2208
QFN28
Pad=GND
© B. Dwersteg,
TRINAMIC
Figure 2.1 TMC2208 Pinning Top View – type: QFN28, 5x5mm², 0.5mm pitch
2.2 Signal Descriptions TMC2208
Pin
Number
Type
Function
OB2
1
Motor coil B output 2
ENN
2
DI
Enable not input. The power stage becomes switched off (all motor
outputs floating) when this pin becomes driven to a high level.
GND
3, 18
GND. Connect to GND plane near pin.
CPO
4
Charge pump capacitor output.
CPI
5
Charge pump capacitor input. Tie to CPO using 22nF 50V capacitor.
VCP
6
Charge pump voltage. Tie to VS using 100nF capacitor.
N.C.
7, 20,
25
Unused pin, leave open or connect to GND for compatibility to future
versions.
5VOUT
8
Output of internal 5V regulator. Attach 2.2µF to 4.7µF ceramic
capacitor to GND near to pin for best performance. Provide the
shortest possible loop to the GND pad.
MS1
9
DI (pd)
Microstep resolution configuration (internal pull down resistors)
MS2, MS1: 00: 1/8, 01: 1/2, 10: 1/4 11: 1/16
MS2
10
DI (pd)
DIAG
11
DO
Diagnostic output. Hi level upon driver error. Reset by ENN=high.
INDEX
12
DO
Configurable index output. Provides index pulse.
CLK
13
DI
CLK input. Tie to GND using short wire for internal clock or supply
external clock.
PDN_UART
14
DIO
Power down not control input (low = automatic standstill current
reduction).
Optional UART Input/Output. Power down function can be disabled
in UART mode.
VCC_IO
15
3.3V to 5V IO supply voltage for all digital pins.