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TMP89FS60 Datasheet(PDF) 236 Page - Toshiba Semiconductor |
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TMP89FS60 Datasheet(HTML) 236 Page - Toshiba Semiconductor |
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236 / 410 page  Page 222 16. Asynchronous Serial Interface (UART) 16.9 Data Sampling Method TMP89FS60 RA001 If "1" is detected in sampling of the start bit, for example, due to the influence of noise, RT clock counting stops and the data receiving is suspended. Subsequently, when a falling edge is detected in the input pulses to the RXD0 pin, RT clock counting restarts and the data receiving restarts with the start bit. Figure 16-8 Start Bit Sampling RT15 14 13 12 11 10 9 8 7 6 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 Bit 0 Start Bit Start Bit Bit 0 RT clock RXD0 pin Shift register Noise Bit 0 Internal received data Error because the start bit is 1 Counting is suspended until the next falling edge is detected Receiving continues because the start bit is 0 The received data is taken into the shift register A falling edge is detected A falling edge is detected |
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