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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SPC564B74L7 датащи(PDF) 55 Page - STMicroelectronics |
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SPC564B74L7 датащи(HTML) 55 Page - STMicroelectronics |
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55 / 118 page  SPC564Bxx - SPC56ECxx Electrical Characteristics Doc ID 17478 Rev 4 55/118 4.6 I/O pad electrical characteristics 4.6.1 I/O pad types The device provides four main I/O pad types depending on the associated alternate functions: ● Slow pads—These pads are the most common pads, providing a good compromise between transition time and low electromagnetic emission. ● Medium pads—These pads provide transition fast enough for the serial communication channels with controlled current to reduce electromagnetic emission. ● Fast pads—These pads provide maximum speed. These are used for improved Nexus debugging capability. ● Input only pads—These pads are associated to ADC channels and 32 kHz low power external crystal oscillator providing low input leakage. ● Low power pads—These pads are active in standby mode for wakeup source. Also, medium/slow and fast/medium pads are available in design which can be configured to behave like a slow/medium and medium/fast pads depending upon the slew-rate control. Medium and fast pads can use slow configuration to reduce electromagnetic emission, at the cost of reducing AC performance. 4.6.2 I/O input DC characteristics Table 14 provides input DC electrical characteristics as described in Figure 5. Figure 5. I/O input DC electrical characteristics definition VIL VIN VIH PDIx = ‘1 VDD VHYS (GPDI register of SIUL) PDIx = ‘0’ |
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