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L9942 bảng dữ liệu(PDF) 22 Page - STMicroelectronics

tên linh kiện L9942
Giải thích chi tiết về linh kiện  Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile
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L9942 bảng dữ liệu(HTML) 22 Page - STMicroelectronics

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5 SPI - Control and Status Registers
L9942
22/37
5.2
Control Register 1
The meaning of the different bits is as follows:
5.3
Counter and Profiles Register 2
The meaning of the different bits is as follows:
5.4
Signal and Profile Register 3
Bit
DAC Scale
DAC Phase B
DAC Phase A
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r w
r w
r w
r
r
r
r
r
r
r
r
r
r
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
Name
DC2
DC1
DC0
BI4
BI3
BI2
BI1
BI0
AI4
AI3
AI2
AI1
AI0
AI4 AI3 AI2 AI1 AI0
These bits control DAC of
bridge A.
Value depends on address and the value of
corresponding current profile.
BI4 BI3 BI2 BI1 BI0
These bits control DAC of
bridge B .
DC2 DC1 DC0
These bits set full scale range
of limit, e.g. 000 for 100 mA or
111for e.g. 1500mA
See also parameter
Table 12.
Bit
Current Profile 1
Not used
Current Profile 0
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r w
r w
r w
r w
r w
r w
r w
r w
r w
r w
r w
r w
r w
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
Name
I4
I3
I2
I1
I0
T2
T1
T0
I4
I3
I2
I1
I0
I4 I3 I2 I1 I0
These bits are loaded in register1 DAC Phase A or B if needed.
See also parameter
Table 12
T2 T1 T0
These bits are used in test mode only.
Bit
Current Profile 3
PWM
Counter
PWM
Current Profile 2
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
r
r
r
r
r
r
r
r
r
r
r
r
r
w
w
w
w
w
w
w
w
w
w
w
w
w
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
Name
I4
I3
I2
I1
I0
D1
(T5)
D0
(T4)
NPW
M(T3)
I4
I3
I2
I1
I0



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