AK4695 Datasheet, PDF (65/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
■ Soft Mute A and B
Soft mute operation is performed in the digital domain. When the SMUTEA (SMUTEB) bit is set “1”, the output signal is
attenuated by -∞ (“0”) during the cycle set by DVTMA (DVTMB) bit. When the SMUTEA (SMUTEB) bit is returned to
“0”, the mute is cancelled and the output attenuation level gradually changes to the value set by DVLA7-0 (DVLB7-0) bits
from -∞ during the cycle set by DVTMA (DVTMB) bit. If the soft mute is cancelled within the cycle set by DVTMA
(DVTMB) bit after starting the operation, the attenuation is discontinued and returned to the level set by DVLA7-0
(DVLB7-0) bits. The soft mute is effective for changing the signal source without stopping the signal transaction (Figure
41)
SMUTEA bit
SMUTEB bit
DVLA7-0 bits
DVTMA bit
DVTMB bit
DVTMA bit
DVTMB bit
DVLB7-0 bits
(1)
Attenuation
(1)
(3)
-
GD
GD
(2)
Analog Output
Figure 41. Soft Mute A/B Function
(1) The input signal is attenuated by  (“0”) during the cycle set by DVTMA (DVTMB) bit.
(2) Analog output corresponding to digital input has group delay (GD).
(3) If soft mute is cancelled within the cycle set by DVTMA (DVTMB) bit after starting the operation, the attenuation is
discounted and returned to the value set by DVLA7-0 (DVLB7-0) bits within the same cycle.
■ General Output Port (GPO1 pin)
The GPO1 pin of the AK4695 can be used as a general output pin. GPO11 and GPO10 bits select the output data of the
GPO1 pin. The GPO1 pin outputs Hi-Z at default setting and in power-down status.
GPO11 bit GPO10 bit
GPO1 pin
0
0
Hi-Z
(default)
0
1
“L” output
1
0
“H” output
1
1
N/A
Table 68. GPO1 Register Setting (N/A: Not available)
MS1463-E-01
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2014/12