Datasheet

TMC220X, TMC222X DATASHEET (Rev. 1.02 / 2017-MAY-16) 11
www.trinamic.com
2.6 Signal Descriptions TMC2224
Pin
Number
Type
Function
MS1
28
DI (pd)
Microstep resolution configuration (internal pull down resistors)
MS2, MS1: 00: 1/4, 01: 1/8, 10: 1/16, 11: 1/32
MS2
1
DI (pd)
INDEX
2
DO
Configurable index output. Provides index pulse.
GND
3, 17
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.
VS
7, 14
Motor supply voltage. Provide filtering capacity near pin with
shortest possible loop to GND pad.
OA2
8
Motor coil A output 2
BRA
9
Sense resistor connection for coil A. Place sense resistor to GND near
pin. Tie to GND when using internal sense resistor.
OA1
10
Motor coil A output 1
OB1
11
Motor coil B output 1
BRB
12
Sense resistor connection for coil B. Place sense resistor to GND near
pin. Tie to GND when using internal sense resistor.
OB2
13
Motor coil B output 2
VREF
15
AI
Analog reference voltage for current scaling or reference current for
use of internal sense resistors (optional mode)
TEST
16
Connect to GND. May alternatively be left open or connected to VREF.
5VOUT
18
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.
VCC_IO
19
3.3V to 5V IO supply voltage for all digital pins.
PDN_UART
20
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.
DIAG
21
DO
Diagnostic output. Hi level upon driver error. Reset by ENN=high.
SPREAD
22
DI (pd)
Chopper mode selection: Low=stealthChop, High=spreadCycle
DIR
23
DI (pd)
DIR input (internal pull down resistor)
ENN
24
DI
Enable not input. The power stage becomes switched off (all motor
outputs floating) when this pin becomes driven to a high level.
STEP
25
DI (pd)
STEP input (internal pull down resistor)
N.C.
26
Unused pin, leave open or connect to GND for compatibility to future
versions.
CLK
27
DI
CLK input. Tie to GND using short wire for internal clock or supply
external clock.
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.