ak4671 AKM Semiconductor, Inc., ak4671 Datasheet - Page 62

• Manufacturer Part Number: ak4671
• Description: Stereo Codec With Mic/rcv/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

1. ADC: Include the Digital Filter (LPF) for ADC as shown in
2. DAC: Include the Digital Filter (LPF) for DAC as shown in
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 Compensation. (See
6. 5-Band Notch: Applicable to use as Equalizer or Notch Filter. (See
7. ALC: Input Digital Volume with ALC function. (See
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
13. DATT-C: Digital Volume of Received Voice. (See
14. SVOLA: Side Tone Volume at B/T Headset Phone Call. (See
MS0666-E-00
Gain Compensation is composed with EQ0 and Gain blocks. This block adjusts the frequency response after Stereo
Separation Emphasis.
Voice”)
ADC
DAC
Recording Mode
Playback Mode
Playback Mode
Recording &
DEM
Mode
DAC
ADC
ADC
1st Order
HPF
SMUTE
DEM
2nd Order
2nd Order
“Soft
HPF
HPF
“Digital Programmable
PMADL
DATT
Mute”.)
Figure 59. Path at Recording & Playback Mode
1
1
0
1
1
0
0
“0” Data
SMUTE
Figure 58. Path at Recording Mode
1st Order
1st Order
Figure 60. Path at Playback Mode
Table 22. Recode/Playback Mode
LPF
LPF
5 Band
PMADR
EQ
DATT
1
0
1
1
0
1
0
“5-band
“Digital Output
Filter”.)
Separation
Separation
“Digital Volume for Received
(Volume)
Stereo
Stereo
ALC
- 62 -
“Input Digital
Equalizer”.)
PMDAL
5 Band
EQ
0
0
0
1
1
1
1
“FILTER
“FILTER
“Side Tone Volume for B/T Phone
Compensation
Compensation
5 Band
Volume”.)
EQ
“Digital Volume for Recording of Received
“Digital Programmable
Gain
Gain
Volume” and
PMDAR
CHRACTERISTICS”.
CHRACTERISTICS”.
0
0
0
1
1
1
1
Compensation
Gain
“Digital Programmable
Notch
Notch
5 Band
5 Band
PFSEL
“ALC
Voice”)
“Digital Programmable
0
0
0
0
0
0
1
Separation
Stereo
“Side Tone
Operation”.)
Filter”.)
(Volume)
(Volume)
Figure 58
Figure 59
Figure 60
ALC
ALC
Figure
Call”.)
1st Order
LPF
Volume”.)
Filter”.)
[AK4671]
Filter”.)
2007/10
1st Order
HPF