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M35074 数据表(PDF) 18 Page - Renesas Technology Corp |
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M35074 数据表(HTML) 18 Page - Renesas Technology Corp |
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18 / 44 page ![]() MITSUBISHI MICROCOMPUTERS M35074-XXXSP SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS 17 (2) To set display frequency range Whenever setting display frequency (when EXCK1 = "0", EXCK0 = "1", or EXCK1 = "1", EXCK0 = "1"), always set the display frequency range in accordance with the display frequency. This range is set from DIVS0, DIVS1, DIVS2, RSEL0 and RSEL1 (address 12016). Frequency ranges are given here below. (3) Notes on setting display frequency To change external clock (display) frequency or horizontal syn- chronization frequency, always use the following procedures. To set EXCK1 = "0", EXCK0 = "1" (a) Turn the display OFF. … DSPON (address 12716) = "0" (b) Set the display frequency. … Set from DIV11 to DIV0, DIVS0, DIVS1, DIVS2, RSEL0 and RSEL1 (ad- dress 12016). (c) Wait 20 ms while the horizontal synchronization signal is being input. (d) Turn the display ON. … DSPON (address 12716) = "1" To set EXCK1 = "1", EXCK0 = "1" (a) Turn the display OFF. … DSPON (address 12716) = "0" (b) Set the display frequency. … Set from DIV11 to DIV0, DIVS0, DIVS1, DIVS2, RSEL0 and RSEL1 (address 12016). (c) Wait 20 ms while the horizontal synchronization signal and external clock are being input. (d) Turn the display ON. … DSPON (address 12716) = "1" RSEL1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 RSEL0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 DIVS1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 DIVS0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 DIVS2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 Display frequency range MHz 112.0 to 120.0 104.0 to 112.0 93.0 to 104.0 80.0 to 93.0 75.0 to 80.0 69.5 to 75.0 62.0 to 69.5 55.0 to 62.0 — 52.0 to 55.0 46.5 to 52.0 40.0 to 46.5 37.5 to 40.0 35.0 to 37.5 31.0 to 35.0 27.5 to 31.0 — 26.0 to 27.5 23.5 to 26.0 20.0 to 23.5 |
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