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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STLED316S датащи(PDF) 25 Page - STMicroelectronics |
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STLED316S датащи(HTML) 25 Page - STMicroelectronics |
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25 / 33 page  STLED316S Key-scanning and display timing 25/33 9 Key-scanning and display timing During the first cycle, the 16 channels are used for the keyscan. The keyscan duration is made up of 64 µs. The second cycle is used for the display of the LED (discrete). The maximum time is 512µs and the 3rd-8th cycles are used for the 7-segment display. The number of cycles will increase or decrease depending upon the user configuration. By default, the configuration is made up of 4 cycles. If any data is written to the discrete LED, only then the 2nd cycle is valid. Otherwise the 7-segment moves from 2nd-7th cycle. This is a continuous operation. During the normal operation, the user cannot control or stop the timing generation. One cycle of key scanning consists of one frame, and data of 8 x 2 matrices are stored in the RAM. |
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