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M306V2EEFS Datasheet(PDF) 225 Page - Renesas Technology Corp |
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M306V2EEFS Datasheet(HTML) 225 Page - Renesas Technology Corp |
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225 / 271 page  Rev.1.40 Oct 06, 2004 page 225 of 269 M306V2ME-XXXFP, M306V2EEFP 2.16.16 Blank Function The blank function can output blank (OUT1) area on all sides (vertical and horizontal) of the screen. This provides the blank signal, wipe function, etc., when outputting a 3 : 4 image on a wide screen. The ON/OFF for vertical blank function is performed by bit 5 of the OSD control register 1 and is used to select vertical window function or vertical blank function by bit 6 of the OSD control register 2. Accord- ingly, the vertical blank function cannot be used simultaneously with the vertical window function. The top border is set by the top border control register (TBR), and the bottom border is set by the bottom border control register (BBR), in 1H units. The ON/OFF for horizontal blank function is performed by bit 4 of the OSD control register 2 and is used interchangeably for the horizontal window function with bit 5 of the OSD control register 2 . Accordingly, the horizontal blank function cannot be used simultaneously with the horizontal window function. The left border is set by the left border control register (LBR) and the right border is set by the right border control register (RBR), in 4TOSC units. The OSD output (except raster) in area with blank output is not deleted. These blank signals are not output in the horizontal/vertical blanking interval. Notes 1. Horizontal blank and horizontal window, as well as vertical blank and vertical window can not be used simultaneously. 2. When using the window function, be sure to set “1” to bit 0 of OSD control register 1. Figure 2.16.46 Blank output example (when OSD output is B + OUT1) Output example of horizontal blank Output example of top and vertical blank OUT1 OUT1 4 A' A B 4 A A' B Blank output signal in microcomputer Blank output signal in microcomputer H L H L H L H L H L H L |
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