Samsung S3C6400X User Manual page 363

S3C6400X RISC MICROPROCESSOR
14
DISPLAY CONTROLLER
OVERVIEW
The Overlay/Display controller includes logic for transferring image data from a local bus of the POST
Processor or a video buffer located in system memory to an external LCD driver interface. LCD driver interface
has three kinds of interface, i.e. the conventional RGB-interface, I80 CPU Interface and NTSC/PAL standard TV
Encoder Interface. The display controller supports up to 5 overlay image windows. Overlay image windows
support various color format, 16 level alpha blending, color key, x-y position control, soft scrolling, variable window
size, and etc.
The display controller supports various color formats such as RGB (1BPP to 24 BPP), and YCbCr 4:4:4(only local
bus).
The display controller can be programmed to support the different requirements on the screen. Requirements
related to the number of horizontal and vertical pixels, data line width for the data interface, interface timing, and
refresh rate.
The display controller is used to transfer the video data and to generate the necessary control signals such as,
RGB_VSYNC, RGB_HSYNC, RGB_VCLK, RGB_VDEN, and SYS_CS0. The control signals and display
controller has the data ports for video data, which are RGB_VD[23:0], SYS_VD, and TV_OUT as shown in Figure
14-1.
BLOCK DIAGRAM
64x32
Figure 14-1. Top block diagram Display Controller
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
DISPLAY CONTROLLER
14-1