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ADSP-BF523C Arkusz danych(PDF) 6 Page - Analog Devices

Numer części ADSP-BF523C
Szczegółowy opis  Blackfin Embedded Processor with Codec
Download  36 Pages
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ADSP-BF523C Arkusz danych(HTML) 6 Page - Analog Devices

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Rev. A
|
Page 6 of 36
|
March 2010
ADSP-BF522C/ADSP-BF523C/ADSP-BF524C/ADSP-BF525C/ADSP-BF526C/ADSP-BF527C
The programmer can simultaneously load the volume control of
both channels by writing to the LRHPBOTH (Register R2, Bit
D8) and RLHPBOTH (Register R3, Bit D8) bits of the left- or
right-channel DAC volume registers.
The maximum output level of the headphone outputs is
1.0 V rms when AVDD and HPVDD = 3.3 V. To suppress audi-
ble pops and clicks, the headphone and line outputs are held at
the VMID dc voltage level when the device is set to standby
mode or when the headphone outputs are muted.
The stereo line outputs of the codec, the LOUT and ROUT pins,
can drive a load impedance of 10 k
Ω and 50 pF. The line output
signal levels are not adjustable at the output mixer, which has a
fixed gain of 0 dB. The maximum output level of the line out-
puts is 1.0 V rms when AVDD = 3.3 V.
DIGITAL AUDIO INTERFACE
The digital audio input can support the following digital audio
communication protocols: right-justified mode, left-justified
mode, I2S mode, and frame sync mode. See Figure 6 on Page 6
through Figure 10 on Page 7.
The mode selection is performed by writing to the FORMAT
bits of the digital audio interface register (Register R7, Bit D1
and Bit D0). All modes are MSB first and operate with data of 16
to 32 bits.
Figure 6. Left-Justified Audio Input Mode
Figure 7. Right-Justified Audio Input Mode
ADCLRC/
DACLRC
CODEC_BCLK
ADCDAT/
DACDAT
1234
N
X
X
X
X
N
12
LEFT CHANNEL
3
RIGHT CHANNEL
1/
fS
X = DON’T CARE.
ADCLRC/
DACLRC
CODEC_BCLK
ADCDAT/
DACDAT
LEFT CHANNEL
RIGHT CHANNEL
1/
fS
X = DON’T CARE.
XN
X
3
2
1
XXN
4
4321


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