CAT6611 データシートの表示（PDF） - Unspecified

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コンポーネント説明

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CAT6611

Single-Link HDMI Transmitter

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CAT6611

down-sampling of both a factor of two and a factor of four. Refer to Table 2 for supported

down-samplings.

Interrupt Generation

The system micro-controller should take in the interrupt signal output by CAT6611 at PIN 17 (INT).

CAT6611 generates an interrupt signal with events involving the following signals or situations:

1. Hot-plug detection (Pin 18, HPD) experiences state changes.

2. Receiver detection circuit reports the presence or absence of an active termination at the TMDS

Clock Channel (Register 0Eh[5], RxSENDetect)

3. DDC bus is hanged for any reasons

4. Audio FIFO overflows

5. HDCP authentication fails

6. Video data is stable or not

A typical initialization of HDMI link should be based on interrupt signal and appropriate register probing.

Recommended flow is detailed in CAT6611 Programming Guide. Simply put, the microcontroller

should monitor the HPD status first. Upon valid HPD event, move on to check RxSENDetect register

to see if the receiver chip is ready for further handshaking. When RxSENDetect is asserted, start

reading EDID data through DDC channels and carry on the rest of the handshaking subsequently.

If the micro-controller makes no use of the interrupt signal as well as the above-mentioned status

registers, the link establishment might fail. Please do follow the suggested initialization flow

recommended in CAT6611 Programming Guide.

The CAT logo is a registered trademark of Chip Advanced Technology

2007 Chip Advanced Technology Inc. – All Right Reserved.

June-2007 Rev:1.0a 11/29

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