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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M16C/26 датащи(PDF) 142 Page - Renesas Technology Corp |
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M16C/26 датащи(HTML) 142 Page - Renesas Technology Corp |
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142 / 239 page  Renesas Technology Corp. Clock Asynchronous Serial I/O (UART) Mode 136 M16C/26 Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Under development Preliminary Specifications Rev. 0.9 Specifications in this manual are tentative and subject to change. (b) TxD, RxD I/O polarity reverse function (UART2) This function reverses/inverts TXD pin output and RXD pin input. The level of any data to be input or output (including the start bit, stop bit(s), and parity bit) is reversed. Set this function to “0” (not re- versed/inverted) for normal use. (c) Bus collision detection function (UART2) This function samples the output level of the TXD pin and the input level of the RXD pin at the rising edge of the transfer clock; if their values are different, then an interrupt request occurs. Figure 1.15.23 shows the example of detection timing of a bus collision (in UART mode). Figure 1.15.23. Detection timing of a bus collision (in UART mode) ST : Start bit SP : Stop bit ST ST SP SP Transfer clock TxD2 RxD2 Bus collision detection interrupt request signal H L H L H L 1 0 Bus collision detection interrupt request bit 1 0 |
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