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STA013 Arkusz danych(PDF) 24 Page - STMicroelectronics

Numer części STA013
Szczegółowy opis  MPEG 2.5 LAYER III AUDIO DECODER
PDF  38 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA013 Arkusz danych(HTML) 24 Page - STMicroelectronics

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RUN
Address: 0x72
Type: RW
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
XXXXX
XX
RUN
Setting this register to 1, STA013 leaves the idle
state, starting the decoding process.
The Microcontroller is allowed to set the RUN
flag, once all the control registers have been in-
itialized.
TREBLE_FREQUENCY_LOW
Address: 0x77
Type: RW
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
TF7
TF6
TF5
TF4
TF3
TF2
TF1
TF0
TREBLE_FREQUENCY_HIGH
Address: 0x78
Type: RW
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
TF15 TF14 TF13 TF12 TF11 TF10
TF9
TF8
The registers TREBLE_FREQUENCY-HIGH and
TREBLE_FREQUENCY-LOW, logically concate-
nated as a 16 bit wide register, are used to select
the frequency, in Hz, where the selected fre-
quency is +12dB respect to the stop band.
By setting these registers, the following rule must
be kept:
Treble_Freq < Fs/2
BASS_FREQUENCY_LOW
Address: 0x79
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
BF7
BF6
BF5
BF4
BF3
BF2
BF1
BF0
BASS_FREQUENCY_HIGH
Address: 0x7A
Software Reset: 0x00
Hardware Reset: 0x00
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
BF15 BF14 BF13 BF12 BF11 BF10
BF9
BF8
The registers BASS_FREQUENCY_HIGH and
BASS_FREQUENCY_LOW,
logically
concate-
nated as a 16 bit wide register, are used to select
the frequency, in Hz, where the selected fre-
quency is -12dB respect to the pass-band. By
setting the BASS_FREQUENCY registers, the
following rules must be kept:
Bass_Freq <= Treble_Freq
Bass_Freq > 0
(suggested range: 20 Hz < Bass_Freq < 750 Hz)
Example:
Bass = 200Hz
Treble = 3kHz
TFS
15 14 13 12 11 10
9
876543210
0000101
110111000
BFS
15 14 13 12 11 10
9
876543210
0000000
011001000
STA013 - STA013B - STA013T
24/38



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