BrightSign HD222, HD1022
13
All information provided in this reference manual applies to products under development. The characteristics and specifications of these products are subject to
change without notice. BrightSign assumes no obligation regarding future manufacturing unless otherwise agreed to in writing. © BrightSign LLC, 2015
Audio Outputs
The HD222 and the HD1022 each have a single high quality audio DAC device, which takes in digital audio signals from
the CPU in an I2S audio format. The AUD_LRCIN is the framing signal for the audio and runs at the frame rate of the
audio source (usually either 44.1KHz or 48KHz). The AUD_BITCLK signal is typically 32 times higher than the
AUD_LRCIN.
The audio output is fed through an amplifier and sent directly to the audio output jack. It can drive a 32
Ω
load with a 2V
RMS signal.
On-Board LEDs
There are four on-board LEDs that indicate the following:
LED
Indication
Green power (
Pwr
)
Displays when the board is powered up and not in reset mode.
Green file-system
activity (
Bsy
)
Flashes any time there is file-system activity (on any storage device)
Yellow update (
Upd
)
Flashes when the board is being upgraded.
Red status (
Err
)
Flashes a certain number of times to indicate which error is occurring. The flash codes are
described below.
2
Unspecified error
3
Network recovery script is preparing to run on a device configured for network recovery.
4
No upgrade file found.
5
Failed to load kernel module.
6
Board is not capable of running the current firmware version.
7
A piece of on-board hardware is not working correctly.
8
Problem related to the storage device (either the USB drive or SD card)
9
Problem related to the registry/NAND
