VX1828B
Preliminary Datasheet
Video Processor for Middle Size LCD Panel
P.21/P.64
V1.0 050420
Title Block
(OSDT_POSX, OSDT_POSY)
(OSDC_POSX, OSDC_POSY)
(OSDB_POSX, OSDB_POSY)
Content Block
Bottom Block
Figure 5.4 OSD Display Blocks
The title and bottom blocks are restricted to display one line of text commonly for header or page notes;
and the content block displays multiple lines of text for main OSD information. The sizes and the
positions for each individual block are adjustable through registers (
Table 5.4
). Each displaying block
cannot be overlapped with others. For details of the register setting, check OSD section in register
description chapter.
Table 5.4 Position and Size Registers
Register Description
OSDT_POSX
OSDT_POSY
Position registers for title block
OSDC_POSX
OSDC_POSY
Position registers for content block
OSDB_POSX
OSDB_POSY
Position registers for bottom block
OSDC_SIZEX
OSDC_SIZEY
Size registers for content block
5.10.3 OSD OPERATIONS
The VX1828’s OSD unit is font-based entry. All information that is going to be shown in the screen
must be translated into fonts, which is in 16 pixel x 20 pixel resolution each, then put into the screen.
