參數(shù)資料
型號： PCM1772RGA
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(zhuǎn)換器與線路輸出AMPIIFIER
文件頁數(shù)： 22/29頁
文件大小： 309K
代理商： PCM1772RGA
SLES010D – SEPTEMBER 2001 – REVISED MAY 2004
www.ti.com
22
MODE CONTROL REGISTERS (PCM1772)
User-Programmable Mode Controls
The PCM1772 device has a number of user-programmable functions that can be accessed via mode control registers. The
registers are programmed using the serial control interface, as discussed in the
SOFTWARE CONTROL (PCM1772)
section. Table 6 lists the available mode control functions, along with their reset default conditions and associated register
index.
Register Map
Table 7 shows the mode control register map. Each register includes an index (or address) indicated by the IDX[6:0] bits.
Table 6. User-Programmable Mode Controls
FUNCTION
RESET DEFAULT
Disabled
REGISTER NO.
01
BIT(S)
Soft mute control, L/R independently
MUTL, MUTR
Digital attenuation level setting, 0 dB to –62 dB in 1-dB steps, L/R
independently
0 dB
01, 02
ATL[5:0], ATR[5:0]
Oversampling rate control (128 fS, 192 fS, 256 fS, 384 fS)
Polarity control for analog output for R-channel DAC
128 fS oversampling
Not inverted
03
OVER
03
RINV
Analog mixing control for analog in, AIN (terminal 14)
Disabled
03
AMIX
44.1-kHz de-emphasis control
Disabled
03
DEM
Audio data format select
24-bit, left-justified format
03
FMT[2:0]
Zero cross attenuation
Disabled
04
ZCAT
Power down control
Disabled
04
PWRD
Table 7. Mode Control Register Map
REGISTER
IDX [6:0]
(B14
–
B8)
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 01
01h
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
MUTR
MUTL
ATL5
ATL4
ATL3
ATL2
ATL1
ATL0
Register 02
02h
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
RSV
ATR5
ATR4
ATR3
ATR2
ATR1
ATR0
Register 03
03h
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
OVER
RSV
RINV
AMIX
DEM
FMT2
FMT1
FMT0
Register 04
NOTE: RSV: Reserved for test operation. It must be set to 0 during regular operation.
Register Definitions
04h
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
RSV
RSV
ZCAT
RSV
RSV
RSV
PWRD
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 01
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
MUTR
MUTL
ATL5
ATL4
ATL3
ATL2
ATL1
ATL0
IDX[6:0]:
000 0001b
MUTx: Soft Mute Control
Where, x = L or R, corresponding to the line output V
OUT
L and V
OUT
R.
Default Value: 0
MUTL, MUTR = 0
MUTL, MUTR = 1
Mute disabled (default)
Mute enabled
The mute bits, MUTL and MUTR, enable or disable the soft mute function for the corresponding line outputs,
V
OUT
L and V
OUT
R.
The soft mute function is incorporated into the digital attenuators.
When mute is disabled
(MUTx = 0), the attenuator and DAC operate normally.
When mute is enabled by setting MUTx = 1, the digital
attenuator for the corresponding output is decreased from the current setting to the infinite attenuation, one
attenuator step (1 dB) at a time. This provides pop-free muting of the line output.
By setting MUTx = 0, the attenuator is increased one step at a time to the previously programmed attenuation
level.
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PCM1773 制造商:BB 制造商全稱:BB 功能描述:LOW VOLTAGE AND LOW POWER STEREO AUDIO DIGITAL TO ANALOG CONVERTER WITH LINEOUT AMPIIFIER
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