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M306V2EEFS датащи(PDF) 192 Page - Renesas Technology Corp |
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M306V2EEFS датащи(HTML) 192 Page - Renesas Technology Corp |
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192 / 271 page ![]() Rev.1.40 Oct 06, 2004 page 192 of 269 M306V2ME-XXXFP, M306V2EEFP Figure 2.16.18 Relation between field determination flag and display font Both HSYNC signal and VSYNC signal are negative-polarity input Field Even Odd Field determination flag(Note) Display dot line selection bit Display dot line 0 (T2 > T1) 1 (T3 < T2) 0 1 0 1 When using the field determination flag, set bit 7 of the peripheral mode register (address 027D16) according to the main clock frequency. T2 T3 OSD ROM font configuration diagram Dot line 0 Dot line 1 Odd Dot line 0 Dot line 1 (n - 1) field (Odd-numbered) T1 0.5 to 0.1 [ms] at f(BCLK) = 10 MHz CC mode · CDOSD mode 1 3 5 7911 13 15 1 3 5 7 9 11 13 15 17 19 21 23 25 26 24 22 20 18 16 14 12 10 8 6 4 2 24 6810 12 14 16 1 3 5 7 9 11 13 15 17 19 20 18 16 14 12 10 8 6 4 2 13 5 7 9 11 13 15 2 4 6 8 10 12 14 16 OSDS mode HSYNC VSYNC and VSYNC control signal in microcom- puter Upper : VSYNC signal Lower : VSYNC control signal in micro- computer (n) field (Even-numbered) (n + 1) field (Odd-numbered) When the display dot line selection bit is “0,” the “ ” font is displayed at even field, the “ ” font is displayed at odd field. Bit 7 of the I/O polarity control register can be read as the field determination flag : “1” is read at odd field, “0” is read at even field. Note : The field determination flag changes at a rising edge of the VSYNC control signal (negative-polarity input) in the microcomputer. |
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