TMC2100 DATASHEET (Rev. 1.07 / 2017-MAY-15)
7
2.2 Signal Descriptions
Pin
QFN36
TQFP48
Type
Function
CLK input. Tie to GND using short wire for internal clock or
supply external clock.
CLK
1
2
DI
CFG3
CFG2
CFG1
CFG0
STEP
DIR
2
3
4
5
6
7
8
3
4
5
7
8
9
10
DI
DI
DI
DI
DI
DI
Configuration input
Configuration input
Configuration input
Configuration input
STEP input
DIR input
VCC_IO
3.3V to 5V IO supply voltage for all digital pins.
Do not connect. Leave open!
11, 14, 16,
18, 20, 22,
23, 28, 41,
43, 45, 47
12
6, 31, 36
13, 48
15
DNC
9, 17
GNDD
N.C.
GNDP
OB1
10
11
12, 35
13
Digital GND. Connect to GND.
Unused pin, connect to GND for compatibility to future versions.
Power GND. Connect to GND plane near pin.
Motor coil B output 1
Sense resistor connection for coil B. Place sense resistor to GND
near pin. Tie to GND when using internal sense resistors.
Motor coil B output 2
Motor supply voltage. Provide filtering capacity near pin with
short loop to nearest GNDP pin (respectively via GND plane).
Configuration input
BRB
OB2
VS
14
17
15
19
16, 31
21, 40
CFG4
CFG5
ERROR
INDEX
CFG6_ENN 22
18
19
20
21
24
25
26
27
29
DI
DI
DO
DO
DI
Configuration input
Diagnostic open drain output: driver error
Diagnostic open drain output: microstep table position index
Enable input (high to disable) and power down configuration
Analog reference voltage for current scaling or reference current
for use of internal sense resistors (optional mode)
Analog GND. Tie to GND plane.
Output of internal 5V regulator. Attach 2.2µF to 10µF ceramic
capacitor to GNDA near to pin for best performance.
5V supply input for digital circuitry within chip and charge
pump. Attach 470nF capacitor to GND (GND plane). May be
supplied by 5VOUT. A 2.2 or 3.3 Ohm resistor is recommended
for decoupling noise from 5VOUT. When using an external
supply, make sure, that VCC comes up before or in parallel to
5VOUT or VCC_IO, whichever comes up later!
Charge pump capacitor output.
AIN_IREF
GNDA
23
24
25
30
32
33
AI
5VOUT
VCC
26
34
CPO
CPI
27
28
29
30
32
33
34
35
37
38
39
42
44
Charge pump capacitor input. Tie to CPO using 22nF 50V
capacitor.
Charge pump voltage. Tie to VS using 100nF 16V capacitor.
Analog supply voltage for 5V regulator. Normally tied to VS.
Provide a 100nF filtering capacitor.
VCP
VSA
OA2
BRA
OA1
Motor coil A output 2
Sense resistor connection for coil A. Place sense resistor to GND
near pin. Tie to GND when using internal sense resistors.
Motor coil A output 1
Test mode input. Tie to GND using short wire.
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 digital circuitry.
46
1
TST_MODE 36
DI
Exposed
-
-
die pad
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