STA014 datasheet(22/45 Pages) STMICROELECTRONICS

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DRB

Address: 0x49 (73)

Type: R/W

Software Reset: 0xFF

Hardware Reset: 0xFF

MSB

LSB

Description

DRB7

DRB6

DRB5

DRB4

DRB3

DRB2

DRB1

DRB0

OUTPUT ATTENUATION

000

0000

NO ATTENUATION

000

0000

-1dB

000

0001

-2dB

:::

::::

011

0000

-96dB

DRB register is used to re-direct the Right Chan-

nel on the Left, or to mix both the Channels.

Default value is 0x00, corresponding at the maxi-

mum attenuation in the re-direction channel.

CHIP_MODE

Address: 0x4D (77)

Type: R/W

Hardware Reset: 0x00

Using this register it’s possible to select which op-

eration will be performed by the DSP.

Possible values are:

0x00 - MP3 decoding

0x01 - Reserved

0x02 - ADPCM Encoder

0x03 - ADPCM Decoder

0x04 - BYPASS mode

The DSP will check for the value of this register

right after the RUN command has been issued

(refer to RUN register). After that no more checks

will be performed: therefore a SOFT_RESET

must be generated in order to change the device

mode.

CRCR

Address: 0x4E (78)

Type: R/W

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

XXXX

XXX

CRCEN

The CRC register is used to enable/disable the

CRC check. If CRC_EN bit is cleared, the CRC

value encoded in the bitstream is checked

against the hardware one. If a discrepance oc-

curs, the current frame is skipped and the de-

coder is muted. The ERROR_CODE register is

affected with the value 0x01.

If CRC_EN bit is set, the result of the CRC check

is ignored, but the ERROR_CODE register is

nevertheless affected with the value 0x01 if a dis-

crepance has occurred.

MFSDF_441

Address: 0x50 (80)

Type: R/W

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

This register contains the value for the PLL X

driver for the 44.1KHz reference frequency.

The VCO output frequency, when decoding

44.1KHz bitstream, is divided by (MFSDF_441 +1)

PLLFRAC_441_L

Address: 0x51 (81)

Type: R/W

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

PF7

PF6

PF5

PF4

PF3

PF2

PF1

PF0

STA014-STA014B-STA014T

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