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DESCRIPTION

It's a mini HDMI decoder board! So small and simple, you can use this board as an

all-in-one display driver for TTL displays, or perhaps decoding HDMI/DVI video for

some other project. This breakout features the TFP401 for decoding video, and for

the touch version, an AR1100 USB resistive touch screen driver.

The TFP401 is a beefy DVI/HDMI decoder from TI. It can take unencrypted video

and pipe out the raw 24-bit color pixel data - HDCP not supported! It will decode

any resolution from 25-165MHz pixel clock, basically up to 1080p. We've used this

breakout with 800x480 displays, so we have not specifically tested it with higher

resolutions. We added a bunch of supporting circuitry like a backlight driver and

configured it for running basic TTL display panels such as the ones we have in the

shop

You can even power the display and decoder from a USB port. For example, with a

5" 800x480 display and 50mA backlight current, the current draw is 500mA total.

You can reduce that down  370mA by running the backlight at half-brightness

(25mA). With the backlight off, the decoder and display itself draws 250mA. If you

want more backlight control, there's a PWM input, connect that to your

microcontroller or other PWM output and you can continuously dim the backlight as

desired

We have two versions, one is video only and one is video+touch. This is the version

with touch! Pair it with a screen that has a resistive touch overlay. The USB port

then acts as both power and data, with the touch screen appearing like a USB

mouse. We've tested it sucessfully on Mac, Windows, and Debian Linux (Raspbian

on a Raspberry Pi). Other Linux distributions may or may not work, but if you're

running Linux you're probably used to that.