DS90UH927Q Datasheet, PDF (23/59 Pages) Texas Instruments – 5MHz - 85MHz 24-bit Color FPD-Link III Serializer with HDCP

DS90UH927Q
status available through the I2C interface. The RX monitors the transmit port status for each TX and reads downstream KSV and
KSV list values from the TX.
In addition to the I2C interface used to control the authentication process, the HDCP Repeater implementation includes two other
interfaces. The FPD-Link LVDS interface provides the unencrypted video data in 24-bit RGB format and includes the DE/VS/HS
control signals. In addition to providing the RGB video data, the LVDS interface communicates control information and packetized
audio data during video blanking intervals. A separate I2S audio interface may optionally be used to send I2S audio data between
the HDCP Receiver and HDCP Transmitter in place of using the packetized audio. All audio and video data is decrypted at the
output of the HDCP Receiver and is re-encrypted by the HDCP Transmitter. Figure 18 provides more detailed block diagram of a
1:2 HDCP repeater configuration.
If video data is output to a local display, White Balancing and Hi-FRC dithering functions should not be used as they will block
encrypted I2S audio.
FIGURE 18. HDCP 1:2 Repeater Configuration
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REPEATER CONNECTIONS
The HDCP Repeater requires the following connections between the HDCP Receiver and each HDCP Transmitter Figure 19.
1. Video Data – Connect all FPD-Link data and clock pairs
2. I2C – Connect SCL and SDA signals. Both signals should be pulled up to V_DD33 or V_DDIO = 3.0V to 3.6V with 4.7 kΩ resistors.
3. Audio (optional) – Connect I2S_CLK, I2S_WC, and I2S_Dx signals.
4. IDx pin – Each HDCP Transmitter and Receiver must have an unique I2C address.
5. REPEAT pin — All HDCP Transmitters and Receivers must be set into Repeater Mode.
6. Interrupt pin – Connect DS90UH928Q INTB_IN pin to DS90UH927Q INTB pin. The signal must be pulled up to V_DDIO.
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