ak4124vf AKM Semiconductor, Inc., ak4124vf Datasheet - Page 15

• Manufacturer Part Number: ak4124vf
• Description: 192khz/ 24bit High Performance Asynchronous Src
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
T Soft Mute Operation
1. Manual mode
Soft mute operation is performed in the digital domain of the SRC output. Soft mute can be controlled by SMUTE pin.
When SMUTE pin goes “H”, the SRC output data is attenuated by
goes “L” the mute is cancelled and the output attenuation gradually changes to 0dB during 1024 OLRCK cycles. 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.
(1) The output data is attenuated by
(2) Digital output delay from the digital input is called the group delay (GD).
(3) If the soft mute is cancelled before attenuating to
2. Semi-Auto mode
The soft mute is cancelled automatically by the setting of PLL2-0 pins (refer to Table 2), after the AK4124 detects the
rising edge (PDN pin = “L”
“L”
(1) The output data is attenuated by
(2) Digital output delay from the digital input is called the group delay (GD).
MS0288-E-01
returned to 0dB by the same number of clock cycles.
“H” and when SMUTE pin is “H”, the mute is not cancelled.
SM U T E
Attenuation
SD T O
SM U T E pin
PD N pin
Attenuation
SD T O
0dB
-
“H”) and the mute is continued during 4410/fso=100ms@fso=44.1kHz. After PDN pin =
0dB
-
Figure 10. Soft Mute Function (Semi-Auto Mode)
Figure 9. Soft Mute Function (Manual Mode)
during 1024 OLRCK cycles (1024/fso).
during 1024 OLRCK cycles (1024/fso).
(1)
“L”
D on’t care
G D
- 15 -
4410/fso
after starting the operation, the attenuation is discontinued and
(2)
within 1024 OLRCK cycles. When the SMUTE pin
1024/fso
(1)
G D
G D
(2)
“L”
(3)
[AK4124]
2004/08