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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST7MC1 数据表(PDF) 169 Page - STMicroelectronics |
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ST7MC1 数据表(HTML) 169 Page - STMicroelectronics |
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169 / 308 page  ST7MC1/ST7MC2 169/308 MOTOR CONTROLLER (Cont’d) Figure 92. Step Ratio Functional Diagram fPERIPH ST[3:0] Bits 4 1 / 2Ratio 1 / 2 Zn < 55h? MTIM Timer = 100h? +1 -1 ck Tratio R+ R- 2 MHz - 62.5 Hz Ratio > 0? Ratio = Ratio - 1 MZREG = MZREG x 2 MZPRV = MZPRV x 2 MDREG = MDREG x 2 Counter = Counter x 2 Begin End Yes No Z Capture with MTIM Timer Underflow (Zn < 55h) Ratio < Fh? Ratio = Ratio + 1 MZREG = MZREG / 2 MZPRV = MZPRV/2 MDREG = MDREG/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 Compute MCOMP MPRSR Register MCOMP = MCOMP/2** ** Only in Auto-switched mode (SWA=1 in MCRA register) 1 |
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