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[AK4675]
MS0963-E-00
2008/05
- 71 -
(1)
ADC: Include the Digital Filter (LPF) for ADC as shown in “FILTER CHRACTERISTICS”.
(2)
DAC: Include the Digital Filter (LPF) for DAC as shown in “FILTER CHRACTERISTICS”.
(3)
HPF: High Pass Filter. Applicable to use as Wind-Noise Reduction Filter. (See “
”.)
(4)
LPF: Low Pass Filter (See “
”.)
(5)
Stereo Separation: Stereo Separation Emphasis Filter & Gain Comparison. (See “
”.)
Gain Comparison is composed with EQ0 and Gain blocks. This block adjusts the frequency response after Stereo
Separation Emphasis.
(6)
5-Band Notch: Applicable to use as Equalizer or Notch Filter. (See “
”.)
(7)
ALC: Input Digital Volume with ALC function. (See “
” and “
”.)
(8)
SVOLA: Side Tone Volume at Internal MIC/SPK or External Headset Phone Call. (See “
”.)
(9)
5-Band EQ: Equalizer for playback path. (See “
”.)
(10)
DATT: Digital Volume for playback path. (See “
”.)
(11)
SMUTE: Soft mute. (See “
”.)
(12)
DATT-B: Digital Volume for Recording of Received Voice. (See “
Digital Volume for Recording of Received
”)
(13)
DATT-C: Digital Volume of Received Voice. (See “
Digital Volume of Received Voice
”)
(14)
SVOLA: Side Tone Volume at B/T Headset Phone Call. (See “
Side Tone Volume for B/T Phone Call
”.)
Mode PMADL
PMADR
PMDAL PMDAR PFSEL Figure
Recording
Mode
1 1 0 0
0
1 0 0 0
0 1 0 0
0
Recording
&
1 1 1 1
0
Playback
Mode
1 0 1 1
0 1 1 1
0
Playback
Mode
0 0 1 1
Table 22. Recode/Playback Mode
2nd Order
HPF
ADC
5 Band
Notch
ALC
(Volume)
1st Order
LPF
Stereo
Separation
Gain
Compensation
Figure 57. Path at Recording Mode
DAC
2nd Order
HPF
ADC
5 Band
Notch
ALC
(Volume)
SMUTE
DEM
1st Order
LPF
Stereo
Separation
Gain
Compensation
DATT
5 Band
EQ
Figure 58. Path at Recording & Playback Mode
DAC
1st Order
HPF
ADC
5 Band
EQ
ALC
(Volume)
1st Order
LPF
Stereo
Separation
Gain
Compensation
1st Order
HPF
“0” Data
SMUTE
DEM
DATT
5 Band
EQ
Figure 59. Path at Playback Mode