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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STP16DPP05XTTR датащи(PDF) 19 Page - STMicroelectronics |
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STP16DPP05XTTR датащи(HTML) 19 Page - STMicroelectronics |
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19 / 34 page  STP16DPP05 Error detection mode functionality DocID16518 Rev 4 19/34 7.2 Phase two: error detection The 16 data bits must be set to “1” in order for all the outputs to be ON during error detection. The data are latched by LE/DM1, after which the outputs are ready for the detection process. When the microcontroller switches the OE/DM2 to LOW, the device drives the LEDs to analyze if an OPEN or SHORT condition has occurred. Figure 19: Detection diagram The status of the LEDs is detected in at least 1 microsecond, and after this period the microcontroller sets OE/DM2 to HIGH state and the output data detection result is sent to the microcontroller via SDO. Error detection mode and normal mode both use the same data format. As soon as all the detection data bits are available on the serial line, the device may return to normal mode of operation. To re-detect the status, the device must first return to normal mode and reenter error detection mode. |
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