AK4635 datasheet(51/81 Pages) AKM

51 / 81 page

[AK4635]

Rev. 0.6

2007/10

- 51 -

■ SOFTMUTE

Soft mute operation is performed in the digital input domain. When the SMUTE bit changes to “1”, the input signal is

attenuated by

−∞ (“0”) during the cycle of 245/fs (31msec@fs=8kHz). When the SMUTE bit is returned to “0”, the mute

is cancelled and the input attenuation gradually changes to 0dB during the cycle of 245/fs (31msec@fs=8kHz). If the soft

mute is cancelled within the cycle of 245/fs (31msec@fs=8kHz), the attenuation is discontinued and returned to 0dB. The

soft mute for Playback operation is effective for changing the signal source without stopping the signal transmission.

SM U T E bit

A ttenuation

24 5/fs

0dB

∞

245 /fs

(1)

(2)

(3)

A nalog O utput

Figure 44. Soft Mute Function

(1) The input signal is attenuated by

−∞ (“0”) during the cycle of 245/fs (31msec@fs=8kHz).

(2) Analog output corresponding to digital input has the group delay (GD).

(3) If the soft mute is cancelled within the cycle of 245/fs (31msec@fs=8kHz), the attenuation is discounted and returned

to 0dB within the same cycle.

AK4635 Datasheet(PDF) 51 Page - Asahi Kasei Microsystems