Datasheet
TMC220X, TMC222X DATASHEET (Rev. 1.02 / 2017-MAY-16) 14
www.trinamic.com
Pin
Number
Type
Function
PDN_UART
11
DIO
(pd)
Power down not control input (low = automatic standstill current
reduction). (internal pull down resistor)
Optional UART Input/Output. Power down function can be disabled
in UART mode.
5VOUT
15
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.
5VIN
16
Input of 5V supply. Directly connect to 5VOUT terminal.
DIAG
12
DO
Diagnostic output. Hi level upon driver error. Reset by ENN=high.
SPREAD
17
DI (pd)
Chopper mode selection: Low=stealthChop, High=spreadCycle
DIR
18
DI (pd)
DIR input (internal pull down resistor)
ENN
19
DI
Enable not input. The power stage becomes switched off (all motor
outputs floating) when this pin becomes driven to a high level.
STEP
20
DI (pd)
STEP input (internal pull down resistor)
INDEX
21
DO
Configurable index output. Provides index pulse.
CLK
22
DI
CLK input. Tie to GND using short wire for internal clock or supply
external clock.
MS1
23
DI (pd)
Microstep resolution configuration (internal pull down resistors)
MS2, MS1: 00: 1/4, 01: 1/8, 10: 1/16, 11: 1/32
MS2
25
DI (pd)
VREF
26
AI
Analog reference voltage for current scaling or reference current for
use of internal sense resistors (optional mode)
CPO
28
Charge pump capacitor output.
CPI
30
Charge pump capacitor input. Tie to CPO using 22nF 50V capacitor.
VCP
31
Charge pump voltage. Tie to VS using 100nF capacitor.
OA1
35, 36
Motor coil A output 1
BRA
37, 38
Sense resistor connection for coil A. Place sense resistor to GND near
pin. Tie to GND when using internal sense resistor.
OA2
40, 41
Motor coil A output 2
OB2
44, 45
Motor coil B output 2
BRB
47, 48
Sense resistor connection for coil B. Place sense resistor to GND near
pin. Tie to GND when using internal sense resistor.
N.C.
Unused pin, leave open or connect to GND for compatibility to future
versions.
Exposed
die pad
-
Connect the exposed die pad to a GND plane. Provide as many as
possible vias for heat transfer to GND plane. Serves as GND pin for
power drivers and analogue circuitry.