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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST7FOXF1 датащи(PDF) 87 Page - STMicroelectronics |
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ST7FOXF1 датащи(HTML) 87 Page - STMicroelectronics |
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87 / 226 page  ST7FOXF1, ST7FOXK1, ST7FOXK2 On-chip peripherals 87/226 Figure 40. Dead time generation In the above example, when the DTE bit is set: ● PWM goes low at DCR0 match and goes high at ATR1+Tdt ● PWM1 goes high at DCR0+Tdt and goes low at ATR match. With this programmable delay (Tdt), the PWM0 and PWM1 signals which are generated are not overlapped. Break function The break function can be used to perform an emergency shutdown of the application being driven by the PWM signals. The break function is activated by the external BREAK pin. This can be selected by using the BRSEL bit in BREAKCR register. In order to use the break function it must be previously enabled by software setting the BPEN bit in the BREAKCR register. The Break active level can be programmed by the BREDGE bit in the BREAKCR register. When an active level is detected on the BREAK pin, the BA bit is set and the break function is activated. In this case, the PWM signals are forced to BREAK value if respective OEx bit is set in PWMCR register. Software can set the BA bit to activate the break function without using the BREAK pin. The BREN1 and BREN2 bits in the BREAKEN register are used to enable the break activation on the 2 counters respectively. In Dual Timer mode, the break for PWM2 and PWM3 is enabled by the BREN2 bit. In Single Timer mode, the BREN1 bit enables the break for all PWM channels. DCR0+1 ATR1 DCR0 Tdt Tdt Tdt = DT[6:0] x Tcounter1 PWM 0 PWM 1 CNTR1 CK_CNTR1 Tcounter1 OVF PWM 0 PWM 1 counter = DCR0 counter = DCR1 |
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