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ST7MC1 数据表(PDF) 215 Page - STMicroelectronics |
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ST7MC1 数据表(HTML) 215 Page - STMicroelectronics |
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215 / 308 page  ST7MC1/ST7MC2 215/308 MOTOR CONTROLLER (Cont’d) MOTOR D EVENT FILTER REGISTER (MDFR) Read/Write Reset Value: 0000 1111 (0Fh) Bits 7:4 = DEF[3:0]: D Event Filter bits These bits select the number of valid consecutive D events (when the D event is detected) needed to generate the active event. Sampling is done at the selected fSCF frequency, see Table 82. Table 69. D Event filter Setting Bit 3:0 = DWF[3:0]: D Window Filter bits These bits select the length of the blanking win- dow activated at each C event. The filter blanks the D event detection. Table 70. D Window Filter setting Note: Times are indicated for 4 MHz fPERIPH 76 54 32 10 DEF3 DEF2 DEF1 DEF0 DWF3 DWF2 DWF1 DWF0 DEF3 DEF2 DEF1 DEF0 D event Samples SR=1 00 00 1 00 01 2 00 10 3 00 11 4 01 00 5 01 01 6 01 10 7 01 11 8 10 00 9 10 01 10 10 10 11 10 11 12 11 00 13 11 01 14 11 10 15 11 11 16 DWF3 DWF2 DWF1 DWF0 C to D Window Filter in Sensorless mode (SR=0) SR=1 0000 5µs 0001 10µs 0010 15µs 0011 20µs 0100 25µs 0101 30µs 0110 35µs 0111 40µs 1000 60µs 1001 80µs 1010 100µs 1011 120µs 1100 140µs 1101 160µs 1110 180µs 1111 200µs |
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