TAS5708 datasheet(39/56 Pages) TI

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ERROR STATUS REGISTER (0x02)

SYSTEM CONTROL REGISTER 1 (0x03)

TAS5708

www.ti.com ........................................................................................................................................................................................... SLOS570 – DECEMBER 2008

The error bits are sticky and are not cleared by the hardware. This means that the software must clear the

Error Definitions:

• MCLK Error : MCLK frequency is changing. The number of MCLKs per LRCLK is changing.

• SCLK Error: The number of SCLKs per LRCLK is changing.

• LRCLK Error: LRCLK frequency is changing.

• Frame Slip: LRCLK phase is drifting with respect to internal Frame Sync.

Table 5. Error Status Register (0x02)

FUNCTION

–

MCLK error

–

PLL autolock error

–

SCLK error

–

LRCLK error

–

Frame slip

–

Over current error

No errors (1)

(1)

Default values are in bold.

The system control register 1 has several functions:

Bit D7:

If 0, the dc-blocking filter for each channel is disabled.

If 1, the dc-blocking filter (–3 dB cutoff <1 Hz) for each channel is enabled (default).

Bit D5:

If 0, use soft unmute on recovery from clock error. This is a slow recovery. Unmute takes same

time as volume ramp defined in reg 0X0E.

If 1, use hard unmute on recovery from clock error (default). This is a fast recovery, a single step

volume ramp

Bits D1–D0: Select de-emphasis

Table 6. System Control Register 1 (0x03)

FUNCTION

–

PWM high-pass (dc blocking) disabled

–

PWM high-pass (dc blocking) enabled (1)

–

Reserved (1)

–

Soft unmute on recovery from clock error

–

Hard unmute on recovery from clock error (1)

–

Reserved (1)

–

Reserved (1)

–

Reserved(1)

–

No de-emphasis (1)

–

Reserved

–

De-emphasis for fS = 44.1 kHz

–

De-emphasis for fS = 48 kHz

(1)

Default values are in bold.

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