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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M306V2EEFS датащи(PDF) 186 Page - Renesas Technology Corp |
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M306V2EEFS датащи(HTML) 186 Page - Renesas Technology Corp |
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186 / 271 page  Rev.1.40 Oct 06, 2004 page 186 of 269 M306V2ME-XXXFP, M306V2EEFP The display position in the vertical direction is determined by counting the horizontal sync signal (HSYNC). At this time, when VSYNC and HSYNC are positive polarity (negative polarity), it starts to count the rising edge (falling edge) of HSYNC signal from after fixed cycle of rising edge (falling edge) of VSYNC signal. So interval from rising edge (falling edge) of VSYNC signal to rising edge (falling edge) of HSYNC signal needs enough time (2 ✕ BCLK cycles or more) for avoiding jitter. The polarity of HSYNC and VSYNC signals can select with the I/O polarity control register (address 020616). Figure 2.16.9 Supplement explanation for display position When bits 0 and 1 of the I/O polarity control register (address 020616) are set to “1” (negative polarity) VSYNC signal input VSYNC control signal in microcomputer 0.1 to 0.2 [ µs] (BCLK = 10 MHz) Period of counting HSYNC signal (Note 2) HSYNC signal input Not count 12345 Notes 1 : The vertical position is determined by counting falling edge of HSYNC signal after rising edge of VSYNC control signal in the microcomputer. 2: Do not generate falling edge of HSYNC signal near rising edge of VSYNC control signal in microcomputer to avoid jitter. 3: The pulse width of HSYNC needs 26 ✕ BCLK cycles or more (BCLK = 10 MHz). 8 ✕ BCLK cycles or more 26 ✕ BCLK cycles or more |
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