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ST72141K 데이터시트(PDF) 55 Page - STMicroelectronics

부품명 ST72141K
상세설명  8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
PDF  132 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72141K 데이터시트(HTML) 55 Page - STMicroelectronics

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MOTOR CONTROLLER (Cont’d)
Figure 34. Step Ratio Functional Diagram
4MHz
ST[3:0] Bits
4
1 / 2Ratio
1 / 2
Zn < 55h?
MTIM Timer = FFh?
+1
-1
ck
Tratio
R+
R-
2 MHz - 62.5 Hz
Ratio > 0?
Ratio = Ratio - 1
Zn = Zn x 2
Zn+1 = Zn+1 x 2
Dn = Dn x 2
Counter = Counter x 2
Begin
End
Yes
No
Z Capture with MTIM Timer Underflow (Zn < 55h)
Ratio < Fh?
Ratio = Ratio + 1
Zn = Zn / 2
Zn+1 = Zn+1/2
Dn = Dn/2
Counter = Counter/2
Begin
End
Yes
No
MTIM Timer Overflow
MTIM Timer control over Tratio and register operation
Slow-down control
Speed-up control
Re-compute Cn
Compute Cn
MPRSR Register



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