Datasheet
6 TMC222 DATASHEET (V. 1.11 / Novermber 25, 2009)
Copyright © 2004-2009 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
OA1
VBAT
VBAT
VBAT
SDA
OA2
GND
GND
open
GND
TST
CPN
CPP
VCP
VBAT
VBAT
VBAT
OB2
OB2
NC
Top view
SWI
NC
HW
VDD
SCL
GND
OB1
OB1
OA2
GND
GND
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8
TMC 222
QFN32
TMC222
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
GND
CPP
OA1
VBAT
VCP
TRINAMIC
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
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
NC
7,16
internally not connected (shields when connected to ground)
Table 1: TMC222 Signal Description