ADAV803ASTZ datasheet(39/61 Pages) AD

39 / 61 page

ADAV803

Rev. A | Page 38 of 60

Transmitter Buffer Configuration—Address 0001101 (0x0D)

Table 39. Transmitter Buffer Configuration Register Bit Map

IU_Zeros3

IU_Zeros2

IU_Zeros1

IU_Zeros0

TxBCONF3

TxBCONF2

TxBCONF1

TxBCONF0

Table 40. Transmitter Buffer Configuration Register Bit Descriptions

Bit Name

Description

IU_Zeros[3:0]

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

Transmitter user bits can be stored in separate buffers or stored together.

0 = User bits are stored together.

1 = User bits are stored separately.

TxBCONF[2:1]

Configures the transmitter user bit buffer.

00 = Zeros are transmitted for the user bits.

01 = Transmitter user bit buffer size is configured according to TxBCONF0.

10 = User bits are written 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 TxBCONF[2:1] 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.

Channel Status Switch Buffer and Transmitter—Address 0001110 (0x0E)

Table 41. Channel Status Switch Buffer and Transmitter Register Bit Map

Reserved

Tx_A/B_Same

Disable_Tx_Copy

Reserved

TxCSSWITCH

RxCSSWITCH

Table 42. Channel Status Switch Buffer and Transmitter Register Bit Description

Bit Name

Description

Tx_A/B_Same

Transmitter Channel Status A and B are the same. The transmitter reads only from the Channel Status A buffer and

places the data into the Channel Status B buffer.

0 = Channel status for A and B are separate.

1 = Channel status for A and B are the same.

Disable_Tx_Copy

Disables the copying of the channel status bits from the transmitter channel status buffer to the S/PDIF transmitter

buffer.

0 = Copying transmitter channel status is enabled.

1 = Copying transmitter channel status is disabled.

TxCSSWITCH

Toggle switch for the transmit channel status buffer.

0 = 24-byte Transmitter Channel Status A buffer can be accessed at address locations 0x38 through 0x4F.

1 = 24-byte Transmitter Channel Status B buffer can be accessed at address locations 0x38 through 0x4F.

RxCSSWITCH

Toggle switch for the receive channel status buffer.

0 = 24-byte Receiver Channel Status A buffer can be accessed at address locations 0x20 through 0x37.

1 = 24-byte Receiver Channel Status B buffer can be accessed at address locations 0x20 through 0x37.

ADAV803ASTZ 数据表(PDF) 39 Page - Analog Devices

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