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M16C/1N датащи(PDF) 128 Page - Renesas Technology Corp |
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M16C/1N датащи(HTML) 128 Page - Renesas Technology Corp |
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128 / 238 page ![]() Rev.1.00 Oct 20, 2004 page 116 of 222 M16C/1N Group 13. Serial I/O REJ09B0007-0100Z LSB first When transfer format select bit = "0" D0 D0 D1 D2 D3 D4 D5 D6 D7 D1 D2 D3 D4 D5 D6 D7 TXDi RXDi CLKi When transfer format select bit = "1" D6 D5 D4 D3 D2 D1 D0 D7 D7 D6 D5 D4 D3 D2 D1 D0 TXDi RXDi CLKi MSB first Note 1: This applies when the CLK polarity select bit = "0". When CLK polarity select bit = "1" D1 D2 D3 D4 D5 D6 D7 D1 D2 D3 D4 D5 D6 D7 D0 D0 TXDi RXDi CLKi When CLK polarity select bit = "0" D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 TXDi RXDi CLKi Note 1: The CLKi pin level when not transferring data is "H". Note 2: The CLKi pin level when not transferring data is "L". 13.1.1 Polarity Select Function As shown in Figure 13.8, the CLK polarity select bit (bit 6 at addresses 00A416 and 00AC16) allows selection of the polarity of the transfer clock. Figure 13.8 Polarity of transfer clock 13.1.2 LSB First/MSB First Select Function As shown in Figure 13.9, when the transfer format select bit (bit 7 at addresses 00A416 and 00AC16) = "0", the transfer format is "LSB first"; when the bit = "1", the transfer format is "MSB first". Figure 13.9 Transfer format |
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