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AK4635 Datasheet, PDF (39/81 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP | |||
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[AK4635]
â Digital Block
The digital block consists of block diagram as shown in Figure 39. The AK4635 can choose various signal processing on
a recording path or a playback path by setting ADCPF bit, PFDAC bit and PFSDO bit. (Figure 39 ~ Figure 42, Table 21)
PMADC bit
ADC
SDTI
HPFAD bit
1st Order
HPF
PMPFIL bit
HPF bit
LPF bit
EQ5-1 bits
â1â â0â
ADCPF bit
1st Order
HPF
1st Order
LPF
5 Band
EQ
â0â â1â
PFSDO bit
SDTO
ALC
(Volume)
â1â â0â
PMDAC bit
PFDAC bit
DATT
SMUTE
DAC
(1) ADC: Include the Digital Filter (LPF) for ADC as shown in âFILTER CHRACTERISTICSâ.
(2) DAC: Include the Digital Filter (LPF) for DAC as shown in âFILTER CHRACTERISTICSâ.
(3) HPF: High Pass Filter. Applicable to use as Wind-Noise Reduction Filter. (See âProgrammable Filterâ.)
(4) LPF: Low Pass Filter (See âDigital Programmable Filterâ.)
(5) 5-Band EQ: Applicable to use as Equalizer or Notch Filter. (See âDigital Programmable Filterâ.)
(6) ALC: Input Digital Volume with ALC function. (See âInput Digital Volumeâ and âALCâ.)
(7) DATT: 4-step Digital Volume for recording path. (See âDigital Volume 2â)
(8) SMUTE: Soft mute. (See âSoft Muteâ.)
Figure 39. Digital Block Path Select
Rev. 0.6
- 39 -
2007/10
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