UDA1342TS Просмотр технического описания (PDF) - Philips Electronics
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UDA1342TS Datasheet PDF : 44 Pages
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Philips Semiconductors
Audio CODEC
Preliminary specification
UDA1342TS
9.8 Data format
A 3-bit value to select the data format.
Table 27 Data format selection
IF2 IF1 IF0
FUNCTION
0 0 0 I2S-bus
0 0 1 LSB-justified16 bits
0 1 0 LSB-justified 20 bits
0 1 1 LSB-justified 24 bits
1 0 0 MSB-justified
1 0 1 LSB-justified 16 bits input and
MSB-justified output
1 1 0 LSB-justified 20 bits input and
MSB-justified output
1 1 1 LSB-justified 24 bits input and
MSB-justified output
9.9 DAC power control
A 1-bit value to disable the DAC to reduce power
consumption. The DAC power-off is not recommended
when the DAC outputs are DC loaded.
Table 28 DAC power control
DP
FUNCTION
0
DAC power-off
1
DAC power-on
9.10 Input oversampling rate
A 2-bit value to select the oversampling rate of the input
signal (see Table 32). In the quad speed input rate, care
must be taken that the input signal is smaller than
−5.67 dB (FS).
9.11 DAC polarity
A 1-bit value to control the DAC polarity.
Table 29 Polarity control of DAC
PDA
0
1
FUNCTION
non-inverting
inverting
9.12 DAC mixing position switch
A 1-bit value to select the mixing position of the ADC signal
in the DAC.
Table 30 DAC mixing position switch
MPS
0
1
FUNCTION
before sound features
after sound features
9.13 DAC mixer
A 1-bit value to enable the digital mixer of the DAC.
Table 31 DAC mixer
MIX
FUNCTION
0
disable mixer
1
enable mixer
Table 32 Input oversampling rate
OS1
0
OS0
MODE
0 single speed
SAMPLING
FREQUENCY
ADC
16 to 110 kHz supported
0
1 double speed 32 to 220 kHz not supported
1
0 quad speed 64 to 440 kHz not supported
1
1 reserved
−
−
DAC FEATURES
all digital filters and all features, including mixing
are available
first digital filter is bypassed, only master volume
and master mute features are available
no mixing nor any sound feature is supported
−
2000 Mar 29
23
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