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M35072 数据表(PDF) 19 Page - Renesas Technology Corp |
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M35072 数据表(HTML) 19 Page - Renesas Technology Corp |
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19 / 41 page ![]() MITSUBISHI MICROCOMPUTERS M35072-XXXFP SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS 18 RSEL1 RSEL0 DIVS1 DIVS0 Display frequency range (MHz) 1 0 0 0 67.0 to 80.0 0 1 0 0 54.0 to 67.0 1 0 0 1 47.0 to 54.0 0 0 0 0 40.0 to 47.0 1 0 1 0 34.0 to 40.0 0 0 0 1 30.0 to 34.0 0 1 1 0 26.0 to 30.0 1 0 1 1 23.0 to 26.0 0 0 1 0 20.0 to 23.0 (2) To set display frequency range Whenever setting display frequency (when EXCK1 = "1", EXCK0 = "1"), always set the display frequency range in accordance with the display frequency. This range is set from DIVS0, DIVS1 (address 12016), RSEL0 address 12116) and RSEL1 (address 12216). Frequency ranges are given here below. (3) Notes on setting display frequency To change external clock (display) frequency or horizontal synchronization frequency, always use the following procedures. (a) Turn the display OFF. … DSPON (address 12816) = "0" (b) Set the display frequency. … Set from DIV10 to DIV0, DIVS0, DIVS1 (address 12016), RSEL0 (address 12116) and RSEL1 (address 12216). (c) Wait 20 ms while the horizontal synchronization signal and external clock are being input. (d) Turn the display ON. … DSPON (address 12816) = "1" |
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