Terasic THDB-HDMI, Руководство пользователя

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Figure 2-3 The block diagram of the HDMI signal transmission
The host can use reset pin TX_RST_N to reset the transmitter, and listen to the interrupt pin
TX_INT_N to detect change of the transmitter status. When interrupt happens, the host needs to
read the internal register to find out which event is triggered and perform proper actions for the
interrupt.
Here are the steps 1-2-3 to control the transmitter:
1. Reset the transmitter from the TX_RST_N pin
2. Initialize the transmitter through the I2C interface
3. Polling the interrupt pin INT_N continuously.

If a HDMI sink device is detected (HDP flag is on):
o
Read and parse EDID to determine the capacity of the attached HDMI sink device.
o
Configure desired output video/audio, including color space and color depth.
o
Perform HDCP authentication
o
Output video/audio signals to the Video/Audio bus.

Stop video output if a video sink device is removed (HPD flag is off).

Perform proper actions according to various interrupt events.