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M32C/8A 数据表(PDF) 230 Page - Renesas Technology Corp |
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M32C/8A 数据表(HTML) 230 Page - Renesas Technology Corp |
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230 / 372 page ![]() M32C/8A Group 17. Serial Interfaces Rev.1.00 Jul 15, 2007 Page 213 of 352 REJ09B0385-0100 17.1.1.2 LSB First or MSB First As shown in figure 17.15, the UFORM bit in the UiC0 register (i = 0 to 4) determines a bit order. Figure 17.15 Bit Order (8-Bit Data Length) (1) When the UFORM bit in the UiC0 register (i = 0 to 4) is set to 0 (LSB first) The above applies under the following conditions: - CKPOL bit in the UiC0 register is set to 0 (transmit data is output at the falling edge and received data is input at the rising edge) - UiLCH bit in the UiC1 register is set to 0 (not inverted). D0 D1 D3 D4 D5 D6 D7 D2 D0 D1 D3 D4 D5 D6 D7 D2 D0 D1 D3 D4 D5 D6 D7 D2 (2) When the UFORM bit is set to 1 (MSB first) D0 D1 D3 D4 D5 D6 D7 D2 CLKi TXDi RXDi "H" "L" "H" "L" "H" "L" CLKi TXDi RXDi "H" "L" "H" "L" "H" "L" |
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