MTL004 查看數據表（PDF） - Myson Century Inc

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产品描述 (功能)

生产厂家

MTL004

XGA Flat Panel Controller

Myson Century Inc 

MYSON

TECHNOLOGY

MTL004

(Rev. 0.95)

3. FUNCTIONAL DESCRIPTION

3.1 Input Processor

General Description

The function of Input Interface is to provide the interface between MTL004 and external input devices. It can

process non-interlaced and interlaced RGB graphic input, and digital RGB input compliant with digital

LVDS/PanelLink TMDS interface.

3.1.1 RGB Input Format

The RGB input port works in two modes: Single Pixel mode (24 bits) and Double Pixel mode (48 bits). For

Single Pixel mode, either ports R/G/B1IN[7:0] or R/G/B2IN[7:0] selected by Reg.16h/D0 can be chosen to be

internally sampled. For the Double Pixel mode, besides ports R/G/B1IN[7:0], ports R/G/B2IN[7:0] are also

needed. The R/G/B1IN ports are sampled at the rising edge of the RGB input clock, and the R/G/B2IN ports

are sampled at the falling edge.

3.1.2 TMDS Input Format

The Digital RGB input port works just in the same way as Sec 3.1.1 except that pin “Digital Input Enable

DIEN “ is needed.

With a flexible single or double pixel input interface, the supported format is up to true color, including 18

bit/pixel or 24 bit/pixel in 1 or 2 pixels/clock mode.

3.1.4 Input HSYNC Path

In addition to the pins HSYNC1/2, MTL004 provides another pin RAWHS to support the Sync Processor.

In general, the synchronous HSYNC input for HSYNC1 or HSYNC2 generated by an ADC may have a very

narrow pulse width and a different polarity comparing to the original HSYNC provided by the source. The

RAWHS input provides the path of original HSYNC connection to MTL004, thus making Sync Processor in

MTL004 working properly.

3.1.6 De-interlace mode

For the interlace input, MTL004 features several de-interlacing algorithms for processing interlaced video

data depending on the type of input images.

¨ Toggle Mode

In this mode, only one field is displayed at the time. First field and second field are toggling displayed. The

missing lines are calculated by duplicating the neighboring lines. This mode gives good quality for moving

pictures.

¨ Spatial Mode

In this mode, two fields are toggling displayed just like the Toggle mode. The missing lines are calculated by

interpolating the neighboring lines. This mode has a generally good quality for still and moving pictures.

3.1.7 Sync Processor

The V/H SYNC processing block performs the functions of Composite signal separation/insertion, SYNC

inputs presence check, frequency counting, polarity detection and control. It contains a de-glitch circuit to

filter out any pulse shorter than one OSC period which is treated as noise among V/H SYNC pulses.

¨ V/H SYNC Frequency Counter

MTL004 can measure VSYNC/HSYNC frequency counted in proper clock and save the information in the

register. Users can read the figure and calculate VSYNC/HSYNC frequency as following formulas:

fvsync = fosc / Nvsync 51/256

fhsync = fosc / Nhsync 58

,Where

fvsync

fhsync

fosc

: VSYNC frequency

: HSYNC frequency

: oscillator clock with 14.31818 MHz

Revision 0.95

-7-

2000/06/14

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