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STPM098C 数据表(PDF) 39 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 39 Page - STMicroelectronics |
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39 / 110 page  3.6 Digital I/O 3.6.1 Digital input (DI) Digital input pins on STPM098C are used to transfer digital communications coming from an external source and supply domain to the internal logic and its related 1.8 V domain. Table 24. Digital input pins functional partitioning Pin Default state Description SM_DATA, SM_CLK Type A - No internal pull-up/down PMBus™ pins VRn_EN [n = 1, 2] Type B - Internal current pull-down Safety related pins (VRn_EN) Digital input pin interface is protected by a CMOS Schmitt trigger supplied by the internal VCC power supply. Figure 31. Digital input simplified structures - Type A and B To main logic Pull Down Current VCC To main logic VCC A) B) GND Table 25. Input electrical characteristics - Type A Symbol Parameter Test condition Min Typ Max Unit Notes DIA_in_hl High input voltage range 1.35 - - V - DIA_in_ll Low input voltage range - - 0.8 V - DIA_in_hyt Threshold hysteresis 120 220 270 mV - DIA_in_leak Input leakage current Pin = GND/VCC -5 - 5 μA - Table 26. Input electrical characteristics - Type B Symbol Parameter Test condition Min Typ Max Unit Notes DIB_in_hl_th High input voltage range 0.78 - - V - DIB_in_ll_th Low input voltage range - - 0.42 V - DIB_in_ltoh_th High level threshold 0.42 0.68 0.78 V Schmitt trigger output low to high DIB_in_htol_th High level threshold 0.42 0.46 0.78 V Schmitt trigger output high to low DIB_in_hyt Threshold hysteresis 100 190 240 mV - DIB_in_pd Input pull-down current Pin = 1.8 V 30 40 60 μA - T_dib_in_flt Deglitch filter time CLK_SSM_EN = 0 9 10 11 μs Digital filter STPM098C Functional description DS14440 - Rev 1 page 39/110 |
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