| HDMI
Shield is an Arduino compatible
development board to bridge the gap |
| between small MCUs
and High Definition Televisions (HDTV). |
|
Small MCUs prevalent in
prototyping systems like
Arduino
or
mbed
normally |
|
are not able to output
high-bandwidth video signal for HDTVs. |
|
HDMI Shield do it in two steps: |
|
(1) use an external LCD controller (RA8876)
to generate RGB video signal. |
|
RA8876 supports multiple display buffers,
picture-in-picture, 2D
BitBlit engine, |
|
DMA
transfer for
images preloaded in Serial Flash, and
font rendering from |
|
embedded character ROM or external
Genitop
serial character ROM. |
|
RA8876 has released the burden of
direct pixel rendering from
the MCU. |
|
With only few commands written by SPI/8080
parallel bus the full frame in a |
| resolution up to 1366*768
can be updated in an instant. |
|
(2) RGB video generated by RA8876 is fed to
a
HDMI encoder
CH7035B. With |
|
its advanced scaling engine this chip can boost
RGB signal in 8:8:8 to
TMDS |
|
signal up to 1920*1080 @ 60Hz (1080p)
output through HDMI/DVI interface. |
|
|
|
Video Channels: |
 |
|
|
|
|
Board features: |
|
* Shield compatible with Arduino form factor
for 3.3V systems |
| * LCD
controller RA8876 generates RGB in
8:8:8 up to 1366*768 |
|
* HDMI encoder CH7035B with an advanced
scaling engine supporting up to |
|
1080p@60Hz HDMI/DVI output |
|
* Compatible with SPI, 8080, or 6800
interface selectable by a dip switch |
| * Onboard 256Mbit SDRAM as frame buffer
equivalent to storage of more |
|
than 17 frames in 1280*720*16bit resolution |
| * Molex
HDMI receptacle for direct connection to any
HDTV or monitor. |
|
* 256Mbit Serial Flash (W25Q256xxx)
stores more than 17 pages of graphic |
|
assets in binary format |
|
* Font chip (GT21L16T1W) for 15x16
dots fonts in hardware |
| * Every
HDMI Shield is bundled with a STM32F103VET6
driver board with |
|
firmware preloaded, which is compatible with
the official AP Software tool |
| downloadable
from RAiO's
web site. With this board you
will find out the |
|
display quality with a direct control on
RA8876 out-of-the-box. |
| * Arduino library
available from Github; fully tested on
ESP8266, ESP32, DUE, |
| Arduino M0, Intel
Genuino 101, and Teensy
3.2/3.5 |
|
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| |
|
|
