ADAV802_15 datasheet(33/53 Pages) AD

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Preliminary Technical Data

ADAV802

Rev. Pr G | Page 33 of 53

Table 36. Transmitter Control Register

RES

Tx-VALIDITY

Tx-RATIO2-0

TxCLK SEL1-0

Tx-ENABLE

5,4,3

2,1

ADDRESS = 0001100

TxVALIDITY

This bit is used to set or clear the VALIDITY bit in the AES3/SPDIF Transmit stream

0 = Audio is suitable for D/A conversion

1 = Audio is not suitable for D/A conversion

TxRATIO2-0

Determines the AES3/SPDIF Transmit to AES3/SPDIF Receiver ratio

000 = Transmitter to Receiver Ratio is 1:1

001 = Transmitter to Receiver Ratio is 1:2

010 = Transmitter to Receiver Ratio is 1:4

101 = Transmitter to Receiver Ratio is 2:1

110 = Transmitter to Receiver Ratio is 4:1

TxCLKSEL1-0

Selects the clock source for the AES3/SPDIF Transmitter

00 = Internal Clock 1 is the clock source for the Transmitter

01 = Internal Clock 2 is the clock source for the Transmitter

10 = The recovered PLL clock is the clock source for the Transmitter

11 = Reserved

TxENABLE

Enables the AES3/SPDIF Transmitter

0 = The AES3/SPDIF Transmitter is disabled

1 = The AES3/SPDIF Transmitter is enabled

Table 37. Transmitter Buffer Configuration Register

IU_Zeros3-0

TxBCONF3

TxBCONF2-1

TxBCONF0

7,6,5,4

2,1

ADDRESS = 0001101

IU_Zeros3-0

Determines the number of zeros to be stuffed between IUs in a message up to a

maximum of 8

0000 = 0

0001 = 1

......

0111 = 7

1000 = 8

TxBCONF3

The Transmitter User Bits can be stored in separate buffers or stored together

0 = The User Bits are stored together

1 = The User Bits are stored seperately

TxBCONF2-1

Configures the Transmitter User Bit Buffer.

00 = Zeros are transmitted for the User Bits

01 = The transmitter User Bit buffer size is configured according to TxBCONF0

10 = Write the User Bits to the transmit buffer in IUs specified by the IEC60958-3

standard

11 = Reserved

TxBCONF0

Determines the buffer size of the transmitter user bits when TxBCONF2-1 is 01

0 = 384 Bits with Preamble-Z as the start of the buffer

1 = 768 Bits with Preamble-Z as the start of the buffer

ADAV802 Datasheet(PDF) 33 Page - Analog Devices

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