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STSPIN820 bảng dữ liệu(PDF) 13 Page - STMicroelectronics

tên linh kiện STSPIN820
Giải thích chi tiết về linh kiện  Advanced 256 microsteps integrated motor driver with step-clock and direction interface
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STSPIN820 bảng dữ liệu(HTML) 13 Page - STMicroelectronics

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STSPIN820
Functional description
29
5.2
Microstepping sequencer
At each STCK rising edge, the sequencer of the device is increased (DIR input high) or
decreased (DIR input low) of a module selected through the MODEx inputs as listed in
Table 7.
The sequencer is a 10-bit counter that sets the reference value of the PWM current
controller and the direction of the current for both of the full-bridges.
Note:
The MODE1, MODE2 and MODE3 configuration can be changed in any time and it is
immediately applied.
Figure 4. MODEx, STCK and DIR timing diagram
Table 7. Step mode selection through MODEx inputs
MODE3
MODE2
MODE1
Step mode
Counter module (binary)
0
0
0
Full-step
0100000000
0
0
1
½ step
0010000000
0
1
0
¼ step
0001000000
01
1
1/8th step
0000100000
10
0
1/16th step
0000010000
10
1
1/32nd step
0000001000
1
1
0
1/128th step
0000000010
1
1
1
1/256th step
0000000001



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