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M306V2EEFS датащи(PDF) 114 Page - Renesas Technology Corp |
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M306V2EEFS датащи(HTML) 114 Page - Renesas Technology Corp |
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114 / 271 page ![]() Rev.1.40 Oct 06, 2004 page 114 of 269 M306V2ME-XXXFP, M306V2EEFP (1) Polarity select function As shown in Figure 2.11.18, the CLK polarity select bit (bit 6 at addresses 03A416, 037C16) allows selection of the polarity of the transfer clock. • When CLK polarity select bit = “1” Note 2: The CLK pin level when not transferring data is “L”. D1 D2 D3 D4 D5 D6 D7 D0 TXDi CLKi • When CLK polarity select bit = “0” Note 1: The CLK pin level when not transferring data is “H”. D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 TXDi RXDi CLKi Figure 2.11.18 Polarity of transfer clock (2) LSB first/MSB first select function As shown in Figure 2.11.19, when the transfer format select bit (bit 7 at addresses 03A416, 037C16) = “0”, the transfer format is “LSB first”; when the bit = “1”, the transfer format is “MSB first”. Figure 2.11.19 Transfer format 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: This applies when the CLK polarity select bit = “0”. |
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