AK4953A Datasheet, PDF (50/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
■ Soft Mute
Soft mute operation is performed in the digital domain. When the SMUTE bit is set “1”, the output signal is attenuated by
-∞ (“0”) during the cycle set by DVTM1-0 bits. When the SMUTE bit is returned to “0”, the mute is cancelled and the
output attenuation gradually changes to the value set by DVL/R7-0 bits from -∞ during the cycle set by DVTM1-0 bits. If
the soft mute is cancelled within the cycle set by DVTM1-0 bits after starting the operation, the attenuation is
discontinued and returned to the level set by DVL/R7-0 bits. The soft mute is effective for changing the signal source
without stopping the signal transaction (Figure 36)
S MU TE bit
DVL/R7-0 bits
A tte nu a tion
D VT M 1 -0
b its
(1)
DV T M1-0
bits
(1)
(3)
-∞
A nalog O utput
GD
GD
(2 )
Figure 36. Soft Mute Function
(1) The input signal is attenuated by −∞ (“0”) during the cycle set by DVTM1-0 bits.
(2) Analog output corresponding to digital input has group delay (GD).
(3) If soft mute is cancelled within the cycle set by DVTM1-0 bits after starting the operation, the attenuation is
discounted and returned to the value set by DVL/R7-0 bits within the same cycle.
MS1252-E-00
- 50 -
2010/10