ak4126 AKM Semiconductor, Inc., ak4126 Datasheet - Page 17

• Manufacturer Part Number: ak4126
• Description: 6ch 192khz / 24-bit Asynchronous Src
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
1. Manual mode
The soft mute operation is performed in the digital domain of the SRC output. The soft mute can be controlled by SMUTE
pin. When SMUTE pin goes “H”, all the SRC output data are attenuated by −∞ during 1024 OLRCK cycles (@ SMT1 pin
= “L” and SMT0 pin = “L”). When the SMUTE pin goes “L” the mute is cancelled and the output attenuation gradually
changes to 0dB during 1024 OLRCK cycles (@ SMT1 pin = “L” and SMT0 pin = “L”). If the soft mute is cancelled before
mute state after starting of the operation, the attenuation is discontinued and returned to 0dB by the same cycles. The soft
mute is effective for changing the signal source. Soft mute cycle is selected by SMT1-0 pins. SMT1-0 pins must not be
changed during soft mute transition.
Note: SDTO shows SDTO1, SDTO2 and SDTO3.
(1) The soft mute cycle is selected by SMT1-0 pins. (See Table 6) The output data is attenuated by −∞ during the soft mute
(2) If the soft mute is cancelled before attenuating to −∞ after starting the operation, the attenuation is discontinued and
MS0544-E-00
Soft Mute Operation
cycle.
returned to 0dB by the same number of clock cycles.
SM U T E
Attenuation
SD T O
SMT1pin
H
H
L
L
0dB
-∞
SMT0 pin
H
H
L
L
Figure 10. Soft Mute Function (Manual Mode)
(1)
Table 6. Soft Mute Cycle Setting
1024/fso
2048/fso
4096/fso
8192/fso
Period
- 17 -
fso=48kHz
170.7ms
21.3ms
42.7ms
85.3ms
(1)
fso=96kHz
10.7ms
21.3ms
42.7ms
85.3ms
fso=192kHz
10.7ms
21.3ms
42.7ms
5.3ms
(2)
[AK4126]
2006/09