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TMPR3916 Datasheet(PDF) 90 Page - Toshiba Semiconductor |
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TMPR3916 Datasheet(HTML) 90 Page - Toshiba Semiconductor |
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90 / 225 page  Chapter 3 Graphics Display Controller (GDC) Preliminary 3-11 HDSERD = HDSERD + ((horoffset << 16) + horoffset) VDSRD = VDSRD + (vertoffset << 16) VDERD = VDERD + (vertoffset << 16) Note: For register scrolling the offset handling is kind of reversed in comparison to smooth scrolling. For scrolling a layer to the right the coordinate of the first visible dot has to be incremented. For scrolling a picture in a layer to the right the start address has to be decremented. Example: Start values: • Horizontal start: dot 34 • Horizontal end: dot 50 • Vertical start: dot 42 • Vertical end: dot 58 For moving layer D up by 2 lines and right by 3 dots the following calculation applies: HDSERD = 0x00220032 + 0x00030003 = 0x00250035 VDSRD = 0x002A0000 – 0x00020000 = 0x00280000 VDERD = 0x003A0000 – 0x00020000 = 0x00380000 |
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