AMIS-30624 I2C Microstepping Motordriver
Data Sheet
12.0 Typical Application
VBAT
C1
C4
220 nF
C3
C6
100 nF
R2
C5
100 µF
CPP VCP VBB
11 12
VBB
CPN
Connect
to VBAT
9
10
19
VDD
C2
SWI
3
20
or GND
1 µF
1 kΩ
MOTXP
SDA
SCK
18
16
1
2
I2C
bus
MOTXN
AMIS-30624
M
MOTYP
MOTYN
15
13
R1
1 kΩ
Connect
to VBAT
or GND
HW
8
6
5
4
7
17
14
TST1
TST2
GND
PC20060925.5
Figure 6: Typical Application Diagram
Notes:
(1) All resistors are ± 5%, ¼ W.
(2) Depending on the application, the ESR value and working voltage of C1 must be carefully chosen.
(3) C2 must be a ceramic capacitor to assure low ESR.
(4) C3 and C4 must be as close as possible to pins CPN, CPP, VCP, and VBB to reduce EMC radiation.
(5) C5 and C6 must be close to pins VBB and GND.
13.0 Positioning Parameters
13.1 Stepping Modes
One of four possible stepping modes can be programmed:
• Half stepping
• 1/4 microstepping
• 1/8 microstepping
• 1/16 microstepping
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
12
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