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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9924TR датащи(PDF) 27 Page - STMicroelectronics |
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L9924TR датащи(HTML) 27 Page - STMicroelectronics |
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27 / 85 page  DocID029638 Rev 2 27/85 L9924 Electrical specifications 84 5.3.6 Pin "DFM" DFM is an output pin used to export a copy of the field PWM signal to external devices to allow a better system control. The DFM is internally connected to a low-side and to a high- side that can be independently configured by the µC by properly setting SPI write registers 0x04 and 0x05 [13.4.13] [13.4.14]. Bits 4 and 5 of SPI register 0x04 are available to set DFM output configuration: This pin can be used to notify the TURBO mode selection; TURBO mode bit (bit 4 of register 0x14, [13.4.8]) is set when the voltage on DFM pin goes above the VMTM and V(A+/B+)< VBIntOvp. TURBO mode can be used by the application SW to skip all the delays to accelerate test procedures. Table 15. DFM output configuration DFM bit1 DFM bit 0 DFM output configuration 0 0 DFM output disabled 0 1 Low side driver enabled 1 0 High side driver enabled 1 1 Push-pull enabled Table 16. Electrical characteristics pin "DFM" # Symbol Parameter Test condition Min. Typ. Max. Unit 1VML Low-side saturation voltage I(DFM) = 5 mA 0.90 1.15 1.40 V 2IMLlim Low-side current limitation - 255075 mA 3VMH High side saturation voltage I(DFM) = -5 mA.Charge pump in OFF state 0.20 0.35 0.60 V 4IMHlim High-side current limitation - -75 -50 -25 mA 5tMLOCfilter Low-side current limitation filter time -- 30 - µs 6tMHOCfilter High-side current limitation filter time -- 30 - µs 7VMTM Turbo mode threshold voltage - 424650 V |
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