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STV2050A データシート(PDF) 36 Page - STMicroelectronics |
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STV2050A データシート(HTML) 36 Page - STMicroelectronics |
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36 / 83 page  36/83 STV2050A - VIDEO PATTERN GENERATOR Figure 18. Vertical Grid Adjustment If the VGP bit is programmed to 0, the grid starts with the first line following the two lines that are reserved for the register update procedure. The allowed range for the VGP is included between the 0 and 511 video lines. 7.3 CURSOR 7.3.1 Cursor Size The cursor is available in different shapes. The shape is selected by the PAS[3] cursor-type bit in the EA register. 7.3.2 Cursor Position The position of the cursor is determined by the most recent write command on the I²C bus. The embedded RAM addresses of dynamic convergence correction values correspond di- rectly to grid positions on the screen. They represent cursor positions as well. If the CPV (Cursor Position Vertical) value exceeds the 0...C(hex) range, the cursor is not dis- played. If a new write address is within the accepted grid range (after having exceeded the range), the cursor pattern is re-displayed (unless the cursor display is turned off). PAS[3] 0: Small Cursor 1: Large Cursor 12 0 1 2 3 4 5 6 visible screen area V-Retrace VGP+2 VGD |
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