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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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M37207MF Arkusz danych(PDF) 67 Page - Renesas Technology Corp |
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M37207MF Arkusz danych(HTML) 67 Page - Renesas Technology Corp |
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67 / 122 page  MITSUBISHI MICROCOMPUTERS M37207MF-XXXSP/FP, M37207M8-XXXSP M37207EFSP/FP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER and ON-SCREEN DISPLAY CONTROLLER 66 (9) Scanning Line Double Count Mode 1 dot in a displayed character is normally shown with 1 scanning line. In the scanning double count mode, 1 dot can be shown with 2 scan- ning lines. As a result, the displayed dot is extended 2 times the normal size in the vertical direction only (that is to say, the height of a character is extended twofold.) In addition, because the scanning line count is doubled, the display start position of a character becomes also twofold position in the vertical direction. In other words, the contents of the vertical position register is as fol- lows: • In ordinary mode 256 steps as values “0016” to “FF16” (4 scanning lines per step) • In scanning line double count mode 128 steps as values “0016” to “7F16” (8 scanning lines per step) If the contents of the vertical position register for a block are set in the range of “8016” to “FF16” in the scanning line double count mode, that block cannot be displayed (not output to the CRT screen). The scanning line double count mode is specified by setting bit 6 of the CRT control register 1 (address 00EA16) to “1.” Since this function works in units of a screen, even if the mode is changed during display of 1 screen, the mode before the change remains until the display of the next screen. Fig. 62. Display in Ordinary Mode and in Scanning Line Double Count Mode Scanning line 32 lines A ! 2 Vertical position A ! 2 (a) Display in the ordinary mode (b) Display in the scanning line double count mode Vertical position A Scanning line 16 lines |
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