TMC2225 DATASHEET (Rev. 1.15 / 2023-FEB-16)
9
Pin
DIAG
SPREAD
DIR
ENN
STEP
N.C.
CLK
MS1
MS2
INDEX
Exposed
die pad
Number
18
19
20
Type
DO
DI (pd)
DI (pd)
21
DI (pd)
22
DI (pd)
23
24
DI
25
DI (pd)
26
DI (pd)
27
DO
-
Function
Diagnostic output. Hi level upon driver error. Reset by ENN=high.
Chopper mode selection: Low=StealthChop, High=SpreadCycle
DIR input (internal pull-down resistor)
Enable not input. The power stage becomes switched off (all motor
outputs floating) when this pin becomes driven to a high level.
(internal pull-down resistor)
STEP input (internal pull-down resistor)
Unused pin, leave open or connect to GND for compatibility to future
versions.
CLK input. Tie to GND using short wire for internal clock or supply
external clock.
Microstep resolution configuration (internal pull-down resistors)
MS2, MS1: 00: 1/4, 01: 1/8, 10: 1/16, 11: 1/32
Configurable index output. Provides index pulse.
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.
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