CH7036
Brief Datasheet
209-1000-011 Rev. 1.34 10/28/2013 1
CH7036 LVDS to HDMI/VGA/LVDS Converter
F
EATURES
G
ENERAL
D
ESCRIPTION
•
Single channel 18-bit/24-bit LVDS receiver and
transmitter support display resolution up to
1366x768
•
HDMI Transmitter are compliant with HDMI 1.4
specification and DVI 1.0 specification
• HDMI Tx supports up to 1920x1080@60Hz
• Supports VGA display up to 1080p
• DDC master for reading EDID
• Supports Hot Plug Detection (HPD) for
HDMI/DVI
• Optional HDCP specification version 1.4 function
• Three 10-bit high speed DACs
• DACs can be switched off through programming
internal registers. A separated composite sync is
supported
• Monitor connection detection capability.
Connection status can be retrieved through
device’s internal registers
• Pixel-level color enhancement for brightness and
contrast (analog RGB only)
• SPDIF audio interface supports up to 20-bit data
stream 192kHz/2ch
• Supports I2S digital audio input up to 24-bit data
stream (32kHz/2ch, 44.1kHz/2ch, 48kHz/2ch,
88.2kHz/2ch, 96kHz/2ch, 176.4kHz/2ch and
192kHz/2ch)
• On-chip frame buffer allows flexible input LVDS
video timing.
• Capable of converting input video frame rate to
satisfy external displays’ refresh rate requirements
• Advanced scaling engine to upsize/downsize
display resolution for HDMI, DVI and analog RGB
outputs
• Programmable adaptive de-flickering filter
• Image display rotation supports for HDMI/DVI and
analog RGB outputs. The screen display can be
rotated 90/180/270 degree or flipped either
horizontally or vertically
• Horizontal/vertical position shifting for the VGA
display is programmable
• Flexible crystal or oscillator clock input frequency
for analog RGB output (2.3MHz – 64MHz). 27
MHz external crystal is recommended for HDMI
output.
• IO and SPC/SPD supply voltages from 1.8V to
3.3V
• Programmable power management
The CH7036 is specifically designed for Consumer
Electronics Devices and Personal Computers that require
High Definition (HD) Content video playback on the
external displays such as HDMI/DVI monitors.
The CH7036’s HDMI transmitter is designed to support
1080p HDTV. For desktop monitors that do not have the
HDMI input, the CH7036 has the capability to disable
HDMI mode and output DVI signal or analog RGB
signal (VGA). To support multi-display, the CH7036 can
output either HDM/DVI or Analog RGB signals together
with LVDS signal pass-through.
The CH7036’s single channel LVDS receiver/transmitter
complies with the SPWG specification, a popular LVDS
standard used by panel manufacturers. Each input/output
LVDS interface is equipped with 4/1 pairs of differential
signal buses to support video data and clock. The built-
in dithering mechanism can be applied to approximate
true 24-bit color video data if system manufacturers use
less expensive 18-bit panels. Conversely, if input data is
only 18-bit color, the simulation to 24-bit color for high-
end TFT LCD is also supported.
The device’s LVDS receiver can accept maximum video
clock frequency for up to 85MHz or 1366x768 resolution
in 24-bit color per pixel. A powerful scaling engine
working together with other video processing circuits,
will convert the captured LVDS signal stored in the
internal SDRAM into High Definition Content video
data. The built-in mixer will combine this HD digital
RGB signal with decoded audio stream into HDMI
format data, which will be serialized for output display
by the CH7036 TMDS encoder.
The CH7036 supports both SPDIF and 2-channel I2S
digital audio inputs. Its high fidelity audio decoder
engine has the capability of sampling audio frequencies
for up to 192kHz for 2 channels.
Utilizing its high speed internal frame buffer, the
CH7036’s scaling engine can increase the flexibility of
the screen display. The video enhancement includes
resizing the HDMI/DVI and RGB output display
resolution, performing Frame Rate Conversion a well as
rotating display orientation. Other video fine tuning, such
as brightness control or contrast adjustment can be used
to improve the display on the analog RGB monitor.
When CH7036 is powered up, its MCU is able to
automatically execute the device configuration software