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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST7MC1K2-Auto датащи(PDF) 197 Page - STMicroelectronics |
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ST7MC1K2-Auto датащи(HTML) 197 Page - STMicroelectronics |
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197 / 371 page  Obsolete Product(s) - Obsolete Product(s) ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto On-chip peripherals 197/371 Table 88 shows the event control selected by the ZVD and CPB bits. In most cases, the D and Z events have opposite edge polarity, so the ZVD bit is usually 0. Demagnetization (D) event At the end of the demagnetization phase, current no longer goes through the free-wheeling diodes. The voltage on the non-excited winding terminal goes from one of the power rail voltages to the common star connection voltage plus the BEMF voltage. In some cases (if the BEMF voltage is positive and the free-wheeling diodes are at ground for example) this end of demagnetization can be seen as a voltage edge on the selected MCIx input and it is called a hardware demagnetization event DH. See Table 88. The D event filter can be used to select the number of consecutive D events needed to generate the DH event. If enabled by the HDM bit in the MCRB register, the current value of the MTIM timer is captured in register MDREG when this event occurs in order to be able to simulate the demagnetization phase for the next steps. 1110 15 1111 16 Table 88. ZVD and CPB edge selection bits(1) 1. Legend: DW = D window filter DEF = D event filter ZWF = Z window filter ZEF = Z event filter. Refer also to Table 92 on page 207. ZVD bit CPB bit Event generation vs input data sampled 00 01 10 11 Note: The ZVD bit is located in the MPOL register, the CPB bit is in the MCRB register. Table 87. Z event filter setting (continued) ZEF3 ZEF2 ZEF1 ZEF0 Z event limit CDH Z ZWF ZEF DEF DWF CDH Z ZWF ZEF DEF DWF CDH Z ZWF DEF ZEF DWF CDH Z ZWF DWF DEF ZEF Obsolete Product(s) - Obsolete Product(s) |
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