TP6508

The TP6508 is an advanced single-chip flat panel VGA controller . It's used for notebook or portable computer system with simple operation and powerful features. Also it contains all of the functions and supports logic required to implement the IBM VGA display standards and enhanced display modes on LCD, PLASMA,EL panel and TV display at register and BIOS level compatiable. A simultaneous display technology is implemented in TP6508 to be used for CRT/Flat panel, LCD/ TV display P.1

The TP6508 is an advanced single-chip flat panel VGA controller . It's used for notebook or portable computer system with simple operation and powerful features. Also it contains all of the functions and supports logic required to implement the IBM VGA display standards and enhanced display modes on LCD, PLASMA,EL panel and TV display at register and BIOS level compatiable. A simultaneous display technology is implemented in TP6508 to be used for CRT/Flat panel, LCD/ TV display.

For minimum chip-count or board-space, it is designed to complete a video subsystem with only one 256kx16 DRAM(512K Bytes). This video subsystem can support all panel type without any glue logic or external frame buffer. Like general VGA graphics chips, the TP6508 includes CRT Controller (CRTC), Attribute Controller (ATRC), Graphic Controller (GFXC), Address Multiplexer (AMUX) , Sequential Controller (SEQC) and adds a Graphics Engine Controller (GEC) to provide VGA display functions and to speed up the system operation.

With the deeper CRT FIFO , and the multiple level CPU command FIFO (Write Buffer) / Read Cache , the TP6508 supports higher system performance even in minimum memory configurations. In order to complete a video subsystem by two chips, VGA controller and DRAM, the TP6508 uses 208pin QFP to integrate Clock Generator(Dual frequency synthesizers), True-color RAMDAC, Display controller, Flat panel controller, Video-in interface, Graphics Engine Controller and Power management controller to minimizes the form factor requirement for VGA subsystem. In addition to an ISA bus connection, it can be connected directly to PCI standard local bus interface to provide additional graphics performance without any glue logic.

TP6508 can support flat panel display, resolution up to 1024x768 mono, 800x600 hi-color, 640x480 true-color. Unlike on CRT, the pixels on a flat panel display are real,discrete entities of a fixed size. This results in problems when different display modes are mapped onto one panel.

The TP6508 provides approach to keep the vertical resolution of the display mode constant but center the active display area vertically on the panel. The flat panel interface supports Monochrome/Color STN LCD panel, Color TFT LCD panel, PLASMA panel and, EL panel. Providing direct panel interface to (DD) Dual-panel,Dual-drive for color and monochrome and (SS) Single-panel,Single-drive (supports 8,9,12,15,16,18,24-bit data). For Single-panel/Single-drive panel which refresh data rate is not high, the TP6508 can set some of the video memory as the frame buffer for panel display to decrease video memory chip counts to one (a 256kx16DRAM).

The TP6508 offers two types DRAM to make various memory configurations including of 512k , 1024k , 2048k memory size for different market. TP6508 support 256k x 4-bit , or 256k x 16-bit DRAM memory to simplify VGA system and implement high resolution display simultaneously.

With Random Memory Cycle allocation skill and the multiple level CPU write buffer, the TP6508 provide better system performance and achieve zero wait state during memory write accesses. When using DRAM 256kx16 by 1 or DRAM 256kx4 by 4, memory size is 512k byte and data width is 16 bits.

When using 256kx16 by 2 or 256kx4 by 8, memory size is 1M byte and data size is 32 bits. TP6508 can support the CRT display resolution up to 1024x768 256 color non-interlace, 800x600 hi-color,640x480 true color at 1M byte display memory. When using 256kx16 by 4 , memory size is 2M byte and data size is 32 bits.

All display-memory can be linear addressing. The Video-in interface accept video signal from PC-video. Providing the power sequential control for flat panel . FPVCC signal is applied to the digital +5V voltage of flat panel, FPVEE signal is applied to the analog Driver's bias voltage of flat panel, and FPBACK signal is applied to the Invertor for the backlight of flat panel, their on/off sequence is programmable. Anotherway TP6508 providing intelligent control by timer to switch power mode (On including Cover-close,standby,suspend,Off) to save the power of TP6508 and Display.

The TP6508 graphics chip has been designed to optimize cost/performance trade-off considerations. The Video clock rate depends upon the mode used, and is up to 135 MHz. The Memory clock input is optional and depends on the display DRAMs access-time . It can be up to 75 MHz.