【稳定方案】新港海岸NCS8827：HDMI转CVBS转接芯片详解

1 Features
CVBS Output
720x576i@60Hz supported
Compliant with VESA VSIS 1.2
HDMI Input
HDMI 1.4a supported
RGB444/YCbCr444/YCbCr422 supported
Pixel clock up to 166MHz
2-channel audio supported
Support Hot-Plug Detect
Adaptive equalization
Clock
Refless clock system
Misc
On-chip 5V to 1.2V regulator
Built-in video test patter
Power
1.2V core supply
2.5V or 3.3V IO supply
Power consumption ~ 150mA
Deep-sleep mode power <1mW
Package
QFN-32 (4mm x 4mm) package
RoHS Compliant
2 Block Diagram
1 Features
CVBS Output
720x576i@60Hz supported
Compliant with VESA VSIS 1.2
HDMI Input
HDMI 1.4a supported
RGB444/YCbCr444/YCbCr422 supported
Pixel clock up to 166MHz
2-channel audio supported
Support Hot-Plug Detect
Adaptive equalization
Clock
Refless clock system
Misc
On-chip 5V to 1.2V regulator
Built-in video test patter
Power
1.2V core supply
2.5V or 3.3V IO supply
Power consumption ~ 150mA
Deep-sleep mode power <1mW
Package
QFN-32 (4mm x 4mm) package
RoHS Compliant
2 Block Diagram

3 General Description
NCS8827 is a low-cost, low-power semiconductor device that consists of HDMI receiver,three separate 9-bit video Digital-to-Analog Converters (DACs) and audio encoder,which can convert HDMI signals into CVBS outputs at a maximum conversion rate of 200MHz with DAC audio output.
The HDMI Receiver integrated is compliant with HDMI 1.4a and support HDCP 1.4 specifications with internal HDCP key.
NCS8827 is designed for Notbook/Ultrabook, Tablet Device,Handheld/Portable Device,Digital Video Systems,HDMI to VGA Adapter/Docking Station,Car Entertainment Device,etc.
The DACs are based on current source architecture. With sophisticated MCU and the Boot ROM embedded, NCS8827 support auto-boot and EDID buffer. Take the advantage of Firmware auto loaded from the embedded Boot ROM, NCS8827 can support HDMI input detection, DAC connection detection and determine to enter into Power saving mode automatically.
All the functions pack into a small 4mm*4mmQFN32 package which saves the precious space in mobile devices.
4 Pin Diagram