參數(shù)資料
型號： BT445KHF135
元件分類： TVS-瞬態(tài)抑制二極管
英文描述： Transient Voltage Suppressor Diodes
中文描述： 視頻DAC的調(diào)色板（的RAMDAC）
文件頁數(shù)： 1/97頁
文件大小： 857K
代理商： BT445KHF135
Brooktree
Brooktree Corporation 9868 Scranton Road San Diego, CA 92121-3707 619-452-7580
1-800-2-BT-APPS FAX: 619-452-1249 Internet: apps@brooktree.com L445001 Rev. F
Bt445
Red
Extract
Green
Blue
Extract
Bypass
Extract
Cursor
UnpLogic
Expand,
Blink, and
Mask Logic
Palette
Bypass
3 xColor
Palette
16 x 24
4 x 24
Cursor
Addr Reg
Digital
Output
Logic
PCLK
PSYNC*
PBLANK*
PVSYNC*
PHSYNC*
OR(3–0)
OG(3–0)
OB(3–0)
DAC
DAC
DAC
R
G
B
IOR
IOG
IOB
COMP2
COMP
Generator
VREF
FS ADJUST
MCLK25
MCLK20
CPUCLK
PLL
S(1,0)
Pixel
Clock
PLL
XTAL2
XTAL1
RANGE
MPX
GND
VAA
Pixel Load
Control
Logic
R
E
G
I
S
T
E
R
R
E
G
I
S
T
E
R
CLOCK
CLOCK*
VIDCLK*
SCLK*
VIDCLKI
LD/SCLKI
P(63–0)
BLANK*
VSYNC*
SYNC*/
HSYNC*
JTAG
Bus Control
CE* R/W C(2–0)
TMS TCK TDI TDO
D(7–0)
150 MHz Monolithic CMOS
Triple 256 x 8 RAMDAC
Distinguishing Features
PLL Pixel Clock Generation (M/N/L)
Up to 64-Bit Input Pixel Port Width
150, and 135 MHz Operation
High-Resolution True-Color Support
2:1 to 64:1 Multiplexed Pixel Port
Bt458 Software Compatible
Programmable Pixel Format
Three 256 x 8 Color Palette RAMs
16 x 24 Overlay Palette
4 x 24 Cursor Palette
Digital Pixel Output Port
0 or 7.5 IRE Blanking
VRAM Shift Clock Generation
System Clock Generation
JTAG Support
160-Pin PQFP Package
Applications
High-Resolution Color Graphics
CAE/CAD/CAM
Image Processing
Instrumentation
Desktop Publishing
Color Flat-Panel Displays
Related Products
Bt431
Bt458
Bt858
The Bt445 is designed specifically for high-performance, high-resolution color
graphics applications. The wide input pixel port and internal multiplexing
modes enable TTL- compatible interfacing to the frame buffer, while maintain-
ing PLL-generated 150 MHz, or externally provided 150 MHz video data rates
required for high refresh rate, high-resolution color graphics.
The Bt445 supports PLL pixel clock generation, supporting a variety of fre-
quencies using an M/N divisor scheme. This decreases system cost due to the
elimination of multiple crystal oscillators that are used to support a variety of
monitor and refresh rates. In addition, the Bt445 provides the serial VRAM
clock, video clock, and various multi-purpose system clocks.
Using a patented pixel port architecture, Flexport
be configured in an almost unlimited variety of pixel depths, multiplex modes,
and input port widths. For example, these modes include 1-, 2-, 4-, 8-, 12-, 16-,
and 24-bit/pixel pseudo color and true color with overlay and cursor palette sup-
port. The Bt445 runs 24-bit true color with cursor, overlay, and palette bypass
support at pixel rates for 1280 x 1024 monitors. The Bt445 is also Bt458 soft-
ware compatible.
Other features include programmable setup and digital pixel outputs, as
required for active matrix TFT support or NTSC encoding.
, the input pixel port can
Functional Block Diagram
相關(guān)PDF資料
PDF描述
BT445KHF150 Transient Voltage Suppressor Diodes
BT471KPJ80 Video DAC with Color Palette (RAMDAC)
BT478KPJ80 Video DAC with Color Palette (RAMDAC)
BT473KPJ110 Video DAC with Color Palette (RAMDAC)
BT473KPJ35 Video DAC with Color Palette (RAMDAC)
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