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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SH7041A датащи(PDF) 489 Page - Renesas Technology Corp |
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SH7041A датащи(HTML) 489 Page - Renesas Technology Corp |
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489 / 923 page  451 12.11 Operation 12.11.1 Input Level Detection Operation If the input conditions set by the ICSR occur on any of the POE pins, all high-current pins become high-impedance state. Falling Edge Detection: When a change from high to low level is input to the POE pins. Low-Level Detection: Figure 12.126 shows the low-level detection operation. Sixteen continuous low levels are sampled with the sampling clock established by the ICSR. If even one high level is detected during this interval, the low level is not accepted. CK Sampling clock 3 POE input PE9/TIOC3B When low level is sampled at all points When high level is sampled at least once Flag set (POE received) Flag not set High-impedance state* Note: * Other large-current pins (PE11/TIOC3D, PE12/TIOC4A, PE13/TIOC4B/ MRES, PE14/TIOC4C/DACK0/AH, PE15/TIOC4D/DACK1/ IROOUT) also go to the high-impedance state at the same time. 2 1 2 1 16 13 8/16/128 clock cycles Figure 12.126 Low-Level Detection Operation |
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