參數(shù)資料
型號： PCM1773PWR
元件分類： DAC
英文描述： LOW VOLTAGE AND LOW POWER STEREO AUDIO DIGITAL TO ANALOG CONVERTER WITH LINEOUT AMPIIFIER
中文描述： 低電壓和低功耗立體聲音頻數(shù)模轉換器與線路輸出AMPIIFIER
文件頁數(shù)： 23/29頁
文件大小： 309K
代理商： PCM1773PWR
SLES010D – SEPTEMBER 2001 – REVISED MAY 2004
www.ti.com
23
ATL[5:0]: Digital Attenuation Level Setting for Line Output, V
OUT
L
Default value: 11 1111b
Line output, V
OUT
L includes a digital attenuation function.
The attenuation level can be set from 0 dB to –62 dB, in
1-dB steps.
Changes in attenuator levels are made by incrementing or decrementing by one step (1 dB) for every
8/f
S
time internal until the programmed attenuator setting is reached. Alternatively, the attenuation level may be
set to infinite attenuation (or mute).
The following table shows attenuation levels for various settings:
ATL[5:0]
11 1111b
0 dB, no attenuation (default)
11 1110b
–1 dB
11 1101b
–2 dB
ATTENUATION LEVEL SETTING
00 0010b
00 0001b
00 0000b
–61 dB
–62 dB
Mute
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 02
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
RSV
ATR5
ATR4
ATR3
ATR2
ATR1
ATR0
IDX[6:0]:
000 0010b
ATR[5:0]: Digital Attenuation Level Setting for Line Output, V
OUT
R
Default Value: 11 1111b
Line output, V
OUT
R includes a digital attenuation function.
The attenuation level can be set from 0 dB to –62 dB, in
1-dB steps.
Changes in attenuator levels are made by incrementing or decrementing by one step (1 dB) for every
8/f
S
time internal until the programmed attenuator setting in reached. Alternatively, the attenuation level can be
set to infinite attenuation (or mute).
To set the attenuation levels for ATR[5:0], see the table for ATL[5:0], register 01.
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 03
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
OVER
RSV
RINV
AMIX
DEM
FMT2
FMT1
FMT0
IDX[6:0]:
000 0011b
OVER: Oversampling Control
Default Value: 0
OVER = 0
OVER = 1
128f
S
oversampling
192f
S
, 256f
S
, 384f
S
oversampling
The OVER bit controls the oversampling rate of the
-
Σ
D/A converters. When it operates at a low sampling rate,
less than 24 kHz, this function is recommended.
RINV: Polarity Control for Line Output, V
OUT
R
Default Value: 0
RINV = 0
RINV = 1
Not inverted
Inverted output
The RINV bits allow the user to control the polarity of the line output, V
OUT
R. This function can be used to connect
the monaural speaker with BTL connection method. This bit is recommended to be 0 during the power-up/-down
sequence for minimizing audible pop noise.
相關PDF資料
PDF描述
PCM1773RGA LOW VOLTAGE AND LOW POWER STEREO AUDIO DIGITAL TO ANALOG CONVERTER WITH LINEOUT AMPIIFIER
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