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ADV7511W
4:2:2 to 4:4:4 and 4:4:4 to 4:2:2 Conversion Block
6.4.4
The 4:2:2 to 4:4:4 conversion block can convert 4:2:2 input signals into the 4:4:4 timing format. This is necessary, for
instance, if the ADV7511W is set in DVI mode and has 4:2:2 format as its video input. The ADV7511W is also capable
of performing 4:4:4 to 4:2:2 conversions.
▷ Please refer to Section 4.3.5 of the ADV7511 Programming Guide for more information about this block.
DDC Controller
6.5
The ADV7511W DDC Controller performs two main functions: support the system's EDID and handle HDCP.
•
The ADV7511W has the ability to read and buffer the sink EDID (one segment of 256 bytes at a time) via
the DDC lines. This feature eliminates the requirement for the source controller to interface directly to
the sink.
•
The ADV7511W DDC controller provides the path through which HDCP content protection
authentication and communications occur. The ADV7511W has internal HDCP key storage (eliminating
the need for an external EEPROM) and a built-in micro-controller to handle HDCP transmitter states,
including handling down-stream HDCP repeaters. This provides content protection for video which
prevents unauthorized digital copying. Refer to Section ▶ for power consumption of HDCP.
▷ Please refer to Section 4.5 of the ADV7511 Programming Guide for more information about this block.
Inter-IC Communications (I2C)
6.6
Two-Wire Serial Control Port
6.6.1
The ADV7511W's registers must be programmed through the SDA and SCL pins using the Inter IC (IIC or I2C)
protocol. The SDA/SCL programming address is 0x72 or 0x7A based on whether the PD/AD pin is pulled high (I2C
address = 0x7A) or pulled low (I2C address = 0x72). When initially powered up, there is a 200ms period before the
device is ready to be addressed.
▷ The ADV7511 Programming Guide provides the information necessary for programming the transmitter.
Up to two ADV7511W devices can be connected to the two-wire serial interface, with a unique address for each device.
The two-wire serial interface comprises a clock (SCL) and a bidirectional data (SDA) pin. The ADV7511W interface
acts as a slave for receiving and transmitting data over the serial interface. When the serial interface is not active, the
logic levels on SCL and SDA are pulled high by external pull-up resistors.
Data received or transmitted on the SDA line must be stable for the duration of the positive-going SCL pulse. Data on
SDA must change only when SCL is low. If SDA changes state while SCL is high, the serial interface interprets that
action as a start or stop sequence.
There are six components to serial bus operation:
■ Start signal
■ Slave address byte
■ Base register address byte
■ Data byte to read or write
■ Stop signal
■ Acknowledge (Ack)
Page 36
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HARDWARE USER'S GUIDE
Rev.A
Rev A
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