參數(shù)資料
型號(hào)： SLB128B
廠商： National Semiconductor Corporation
英文描述： Transmitter with built-in scaler for LVDS Display Interface (LDI)
中文描述： 發(fā)射器內(nèi)置的LVDS顯示接口（低密度脂蛋白縮放）
文件頁(yè)數(shù)： 37/48頁(yè)
文件大?。?/td> 650K
代理商： SLB128B
Scaler Information
DVO Input and Bypass Mode:
The input single port DVO data is translated into 18bit/24bit
RGB data for scaling. Single port data over 108MHz or dual
port data will be bypassed and not scaled. The LVDS output
can be single or dual port.
Input Timing Control:
The DS90C2501 input timing control can detect the input
timing information such as horizontal and vertical sync width,
pixel-total and line-total count and the active video starting
and ending positions. Such information can be provided to
the host through two-wire serial communication Interface to
help determine the input mode.
Display Synchronization
The DS90C2501 synchronizes the display timing with input
graphics timing so that no external frame buffer is needed.
There are three operation modes:
Free-run mode: No synchronization. Output timing is gener-
ated from external 14.318MHz reference clock.
Line lock mode: the display Hsync is synchronized with the
input line rate.
Frame lock mode: the display Vsync is synchronized with the
input frame rate.
In free-run mode, the display timing is decided by the values
programmed into the various timing registers. In line-lock
mode, the display line rate is a function of the selected input
clock, forcing the output frame rate to be locked to input
frame rate. Timing management is more complicated The
frame-lock mode is used more often. The output pixel clock
and Hsync are generated from the external 14.318MHz ref-
erence clock and the embedded PLL, but the Vsync is
refreshed at the input frame rate.
Gamma Look-up Table (LUT):
The DS90C2501 provides an 8-bit look-up-table (LUT) for
each input color channel in case gamma correction is
needed. The LUT is user programmable to provide an arbi-
trary transfer function.
The transmitter is offered with programmable edge data
strobes for convenient interface with a variety of graphics
controllers. The transmitter can be programmed for rising
edge strobe or falling edge strobe through a dedicated pin. A
rising edge transmitter will inter-operate with a falling edge
receiver without any translation logic.
Output Timing Control:
The DS90C2501 output timing is fully programmable through
two-wire serial communication Interface for different panel
requirements. When 6-bit color LCD is used, dithering (FRC)
can be turned on via two-wire serial communication pro-
gramming interface. The least two LSB of each color are
default to be logic low all the time. When 8-bit color LCD is
used, dithering (FRC) is not needed, and can be turned off
via two-wire serial communication programming interface.
See DS90C2501 guide for further information on program-
ming these features.
D
www.national.com
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