
6
TMC222 DATASHEET (V. 1.12 / March 7, 2011)
Copyright 2004-2011 TRINAMIC Motion Control GmbH & Co. KG
2.5
Miscellaneous
Besides the main blocks the TMC222 contains the following:
an internal charge pump used to drive the high side transistors.
an internal oscillator running at 4 MHz +/- 10% to clock the two wire serial interface, the
positioning unit, and the main control block
internal voltage reference for precise referencing
a 5 Volts voltage regulator to supply the digital logic
protection block featuring Thermal Shutdown, Power-On-Reset, etc.
2.6
Pin and Signal Descriptions
OA1
VBAT
SDA
O
A
2
G
N
D
G
N
D
o
p
e
n
G
N
D
T
S
T
CPN
CPP
VCP
VBAT
OB2
N
C
Top view
SWI
NC
H
W
V
D
S
C
L
G
N
D
O
B
1
O
B
1
O
A
2
G
N
D
G
N
D
32
31
30
29
28
27
26
25
9
10
11
12
13
14
15
16
1
7
1
8
1
9
2
0
2
1
2
3
2
4
1
2
3
4
5
6
7
8
TMC 222
QFN32
T
M
C
2
HW
TST
SWI
CPN
GND
open
GND
SCL
SDA
VDD
OA2
OB1
3
4
5
6
7
8
9
10
15
16
17
20
14
1
2
11
12
13
18
OB2
19
VBAT
GND
CPP
OA1
VBAT
VCP
T
R
IN
A
M
IC
Name
SOIC20
QFN32
Description
SDA
1
8
SDA Serial Data input/output
SCL
2
9
SCL Serial Clock input
VDD
3
10
internal supply (needs external decoupling capacitor)
GND
4,7,14,17
11,14,25,26,
31,32
ground, heat sink
TST
5
12
test pin (to be tied to ground in normal operation)
open
6
13
must be left open
HW
8
15
hard-wired serial interface address bit input
Hint: This is not a logic level input as usual; it needs to be
connected via 1K resistor either to +VBAT or GND;
CPN
9
17
negative connection of external charge pump capacitor
CPP
10
18
positive connection of external charge pump capacitor
VCP
11
19
connection of external charge pump filter capacitor
VBAT
12, 19
3-5,20-22
battery voltage supply (Vbb)
OB2
13
23,24
negative end of phase B coil
OB1
15
27,28
positive end of phase B coil
OA2
16
29,30
negative end of phase A coil
OA1
18
1,2
positive end of phase A coil
SWI
20
6
reference switch input;
Hint: This is not a logic level input as usual; it needs to be
connected via 1K resistor either to +VBAT or GND;
NC
7,16
internally not connected (shields when connected to ground)
Table 1: TMC222 Signal Description