UDA1341TS Просмотр технического описания (PDF) - NXP Semiconductors.
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UDA1341TS
NXP Semiconductors.
UDA1341TS Datasheet PDF : 34 Pages
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NXP Semiconductors
Economy audio CODEC for MiniDisc (MD)
home stereo and portable applications
Product specification
UDA1341TS
7.21.3.3 Mixer mode
A 2-bit value to program the mode of the digital mixer.
There are four modes: double differential, input channel 1
select, input channel 2 select and digital mixer mode.
The default setting is given in Table 5.
7.21.3.6 Input channel 2 amplifier gain
A 7-bit value to program the input channel 2 amplifier gain.
The range is from −3 to +60.5 dB in steps of 0.5 dB. These
settings are only valid when AGC control is disabled and
not valid in the double differential mode.
Table 28 Mixer mode switch settings
MM1 MM0
FUNCTION
0 0 double differential mode
0 1 input channel 1 select (input channel 2 off)
1 0 input channel 2 select (input channel 1 off)
1 1 digital mixer mode
(input 1 × MA + input 2 × MB)
7.21.3.4 AGC control
A 1-bit value to enable the AGC input. The default setting
is given in Table 5.
Table 29 AGC control settings
AG
FUNCTION
0
disable AGC: manual gain setting through
IG (7 bits)
1
enable AGC: gain control with manual MIC
sensitivity setting
7.21.3.5 AGC output level
A 2-bit value to program the AGC output level. The default
setting is given in Table 5.
Table 31 Input channel 2 amplifier gain settings
IG6 IG5 IG4 IG3 IG2 IG1 IG0
0000000
0000001
0000010
0000011
0000100
0000101
0000110
:::::::
1111101
1111110
1111111
INPUT
CHANNEL 2
AMPLIFIER
GAIN
(dB)
−3.0
−2.5
−2.0
−1.5
−1.0
−0.5
0.0
:
59.5
60.0
60.5
7.21.3.7 AGC time constant
A 3-bit value to program the attack and the decay
parameters of the digital AGC. The default setting is given
in Table 5.
Table 30 AGC output level settings
AL1 AL0
00
01
10
11
−9.0
−11.5
−15.0
−17.5
OUTPUT LEVEL
(dB FS)
Table 32 AGC time constant settings
AT2
AT1
AT0
ATTACK TIME
(ms)
0
0
0
11
0
0
1
16
0
1
0
11
0
1
1
16
1
0
0
21
1
0
1
11
1
1
0
16
1
1
1
21
DECAY TIME
(ms)
100
100
200
200
200
400
400
400
2002 May 16
20
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