DIX4192IPFBT datasheet(39/60 Pages) BURR-BROWN

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DIX4192

SBFS031C – JANUARY 2006 – REVISED JUNE 2006

TXDIV[1:0]

Transmitter Master Clock Divider

These bits are used to select the Transmitter master clock divider, which determines the output frame rate.

TXDIV1

TXDIV0

Clock Divider

Divide the master clock by 128. (default)

Divide the master clock by 256.

Divide the master clock by 384.

Divide the master clock by 512.

TXCLK

Transmitter Master Clock Source

This bit is used to select the master clock source for the Transmitter block.

TXCLK

Transmitter Master Clock Source

MCLK input (default)

RXCKO; the recovered master clock from the DIR function block.

Bit 7 (MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0 (LSB)

BYPMUX1

BYPMUX0

AESMUX

LDMUX

TXBTD

AESOFF

TXMUTE

TXOFF

Transmitter Line Driver Output Enable

This bit is used to enable or disable the TX+ (pin 32) and TX– (pin 31) line driver outputs.

TXOFF

Transmitter Line Driver

Enabled; the line driver outputs function normally. (default)

Disabled; the line driver outputs are forced low.

TXMUTE

Transmitter Audio Data Mute

This bit is used to set the 24 bits of audio and auxiliary data to all zeros for both Channels 1 and 2.

TXMUTE

Transmitter Audio Data Mute

Disabled (default)

Enabled; the audio data for both channels 1 and 2 are set to all zeros.

AESOFF

AESOUT Output Enable

This bit is used to enable or disable the AESOUT (pin 34) buffered AES3-encoded CMOS logic level output.

AESOFF

AESOUT Output

Enabled; the AESOUT pin functions normally. (default)

Disabled; the AESOUT pin is forced low.

TXBTD

Transmitter C and U Data Buffer Transfer Disable

This bit is used to enable and disable buffer transfers between the DIT User Access (UA) and DIT Transmitter Access (TA) buffers for

both channel status (C) and user (U) data.

Buffer transfers may be disabled, allowing the user to write new C and U data to the UA buffers via the SPI or I2C serial host interface.

Once updated, UA-to-TA buffer transfers may then be re-enabled, allowing the TA buffer to be updated and the new C and U data to be

transmitted at the start of the next block.

TXBTD

User Access (UA) to Transmitter Access (TA) Buffer Transfers

Enabled (default)

Disabled; allows the user to update DIT C and U data buffers.

Note: The TXCUS0 and TXCUS1 bits in control register 0x09 must be set to a non-zero value in order for DIT UA buffer updates to occur.

LDMUX

Transmitter Line Driver Input Source Selection

This bit is used to select the input source for the DIT differential line driver outputs.

LDMUX

Line Driver Input Source

DIT AES3 encoder output (default)

Bypass multiplexer output

AESMUX

AESOUT CMOS Buffer Input Source Selection

This bit is used to select the input source for the AESOUT CMOS logic level output.

AESMUX

AESOUT Buffer Input Source

DIT AES3 encoder output (default)

Bypass multiplexer output

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