AK4635 datasheet(39/81 Pages) AKM

39 / 81 page

[AK4635]

Rev. 0.6

2007/10

- 39 -

■ 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)

DAC

1st Order

HPF

ADC

ALC

(Volume)

DATT

SMUTE

SDTI

ADCPF bit

“1”

“0”

5 Band

1st Order

HPF

PFDAC bit

“1”

“0”

PFSDO bit

“0”

“1”

SDTO

HPF bit

EQ5-1 bits

HPFAD bit

PMPFIL bit

PMDAC bit

PMADC bit

1st Order

LPF

LPF 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”.)

Figure 39. Digital Block Path Select

AK4635 Datenblatt(PDF) 39 Page - Asahi Kasei Microsystems

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