AK4635 AKM [Asahi Kasei Microsystems], AK4635 Datasheet - Page 39

• Manufacturer Part Number: AK4635
• Description: 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

■
The digital block consists of block diagram as shown in
a recording path or a playback path by setting ADCPF bit, PFDAC bit and PFSDO bit.
(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 “Programmable Filter”.)
(4) LPF: Low Pass Filter (See “Digital Programmable Filter”.)
(5) 5-Band EQ: Applicable to use as Equalizer or Notch Filter. (See “Digital Programmable Filter”.)
(6) ALC: Input Digital Volume with ALC function. (See “Input Digital Volume” and “ALC”.)
(7) DATT: 4-step Digital Volume for recording path. (See “Digital Volume 2”)
(8) SMUTE: Soft mute. (See “Soft Mute”.)
Rev. 0.6
Digital Block
PMADC bit
HPFAD bit
Figure 39. Digital Block Path Select
“0”
SDTO
1st Order
PMPFIL bit
“1”
ADC
HPF
PFSDO bit
EQ5-1 bits
HPF bit
LPF bit
Figure
- 39 -
PMDAC bit
1st Order
1st Order
“1”
(Volume)
39. The AK4635 can choose various signal processing on
5 Band
HPF
ALC
LPF
EQ
“0”
ADCPF bit
SMUTE
“1”
DATT
DAC
“0”
PFDAC bit
SDTI
(Figure 39
~
Figure
42,
[AK4635]
Table
2007/10
21)