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STA014B Arkusz danych(PDF) 23 Page - STMicroelectronics

Numer części STA014B
Szczegółowy opis  MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM AND SRS WOWO POSTPROCESSING CAPABILITY
PDF  45 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA014B Arkusz danych(HTML) 23 Page - STMicroelectronics

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ADPCM_DATA_READY
Address: 0x52 (82)
Type: R/W
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
XX
XXXXX
ADR
ADR: Adpcm Data Ready
This bit signal ADPCM encoded data are ready to
be retrieved.
PLLFRAC_441_H
Address: 0x52 (82)
Type: R/W
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
PF15 PF14 PF13 PF12 PF11 PF10
PF9
PF8
The registers are considered logically concate-
nated and contain the fractional values for the
PLL, for 44.1KHz reference frequency.
(see also PLLFRAC_L and PLLFRAC_H regis-
ters)
ADPCM_SAMPLE_FREQ
Address: 0x53 (83)
Type: R/W
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
X
X
X
ADPCM_SF
ADPCM_SF: Adpcm Sample Frequency
0x02
8KHz
0x0A
16KHz
0x0E
32KHz
PCMDIVIDER
Address: 0x54 (84)
Type: RW
Software Reset: 0x01
Hardware Reset: 0x01
765
432
10
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
PCMDIVIDER is used to set the frequency ratio
between the OCLK (Oversampling Clock for
DACs), and the SCKT (Serial Audio Transmitter
Clock).
The relation is the following:
SCKT_freq
=
OCLK_freq
2
(1 + PCM_DIV)
STA014-STA014B-STA014T
23/45



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