STA014B datasheet(24/45 Pages) STMICROELECTRONICS

Teilenummer	STA014B

Bauteilbeschribung	MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM AND SRS WOWO POSTPROCESSING CAPABILITY

PDF	45 Pages

Scroll/Zoom	100%

Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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24 / 45 page

The Oversampling Factor (O_FAC) is related to OCLK and SCKT by the following expression:

1) OCLK_freq = O_FAC * LRCKT_ Freq

(DAC relation)

2) OCLK_ Freq = 2 * (1+PCM_DIV) * 32*

LRCKT_Freq (when 16 bit PCM mode is used)

3) OCLK_ Freq = 2 * (1+PCM_DIV) * 64*

LRCKT_Freq (when 32 bit PCM mode is used)

4) PCM_DIV = (O_FAC/64) - 1 in 16 bit mode

5) PCM_DIV = (O_FAC/128) - 1 in 32 bit mode

Example for setting:

MSB

LSB

Description

PD7

PD6

PD5

PD4

PD3

PD2

PD1

PD0

000

0011

16 bit mode

512 x Fs

000

0010

16 bit mode

384 x Fs

000

0001

16 bit mode

256 x Fs

000

0001

32 bit mode

512 x Fs

000

0001

32 bit mode

384 x Fs

000

0000

32 bit mode

256 x Fs

for 16 bit PCM Mode

O_FAC = 512 ; PCM_DIV = 7

O_FAC = 256 ; PCM_DIV = 3

O_FAC = 384 ; PCM_DIV = 5

for 32 bit PCM Mode

O_FAC = 512 ; PCM_DIV = 3

O_FAC = 256 ; PCM_DIV = 1

O_FAC = 384 ; PCM_DIV = 2

STA014-STA014B-STA014T

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