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There are some other interface signals related to AD9883
SOGIN – Sync On Green input from Image Processor , the signal enable the PB6100 support
the very special VGA input signal .
GCOAST – Input signal from Image Processor , the signal enable the PB6100 support the
Machintosh analog input format .
GCLK – Output to Image Processor as Pixel Clock , providing the reference clock for Image
Processor .
GHS – Providing the Horizontal Synchronization signal to Image Processor .
GVS - Providing the Vertical Synchronization signal to Image Processor .
GRE,GGE,GBE – Digital data stream to Image Processor which is higher than SXGA
75HZ .
. Image Processor (PW166)
The most important IC is the image Processor , here below list its main function
- Supporting input digital data stream up to UVGA and output digital data up to SXGA
- Two input port , which are Graphic port ( VGA format ) and Video port ( video decoder format ) .
- Frame rate conversion , the output frame rate is independent from the input frame rate and
the most important feature of the Image Processor is memory inside , there is no need
of external memory for frame rate convertion .
- Up and Down scaling of different input resolution , ensure the same output image size .
- Providing Bitmap OSD picture , which if more fancy than normal OSD chip .
- On chip Microprocessor
The Image Processor is a highly integrated circuit , it include MCU , Scaler , Memory , OSD . This
will increase the stability of the system .
There is some control signals list below
DCLK – pixel clock output to DMD driver BD , provided as a reference clock for DMD driver
DVS – Vertical synchronization signal output to DMD BD , provided as Vertical reference signal
for DMD driver .
DHS – Horizontal synchronization signal output to DMD BD , provided as Horizontal reference
signal for DMD driver .
DEN – Data enable signal output to DMD BD , provided as a valid data indicator signal for
DMD driver .
VCLK – V-port pixel clock .
VPEN – V-port data enable .
VVS – V-port Vertical Synchronization .
VHS – V-port Horizontal Synchronization .
VFILED – V-port Even/Odd frame indicator .
RESETZ – Output to DMD driver BD as RESETZ signal for DMD normal operation .
ABNORMAL – Input to CPU for indicating abnormal condition , if the CPU detects an