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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SPC572LX датащи(PDF) 24 Page - STMicroelectronics |
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SPC572LX датащи(HTML) 24 Page - STMicroelectronics |
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24 / 112 page  Electrical characteristics SPC572Lx 24/112 DocID027866 Rev 5 Note: Each I/O pin on the device supports specific drive configurations. See the signal description table in the device reference manual for the available drive configurations for each I/O pin. 3.8.1 I/O input DC characteristics Table 12 provides input DC electrical characteristics as described in Figure 5. Figure 5. I/O input DC electrical characteristics definition Table 11. I/O pad specification descriptions Pad type Description Weak configuration Provides a good compromise between transition time and low electromagnetic emission. Pad impedance is centered around 800 Ω. Medium configuration Provides transition fast enough for the serial communication channels with controlled current to reduce electromagnetic emission. Pad impedance is centered around 200 Ω. Strong configuration Provides fast transition speed; used for fast interface. Pad impedance is centered around 50 Ω. Very strong configuration Provides maximum speed and controlled symmetric behavior for rise and fall transition. Used for fast interface including Ethernet interfaces requiring fine control of rising/falling edge jitter. Pad impedance is centered around 40 Ω. Differential configuration A few pads provide differential capability providing very fast interface together with good EMC performances. Input only pads These low input leakage pads are associated with the ADC channels. VIL VIN VIH VINTERNAL VDD VHYS (SIUL register) |
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