AK4128A Datasheet, PDF (31/50 Pages) Asahi Kasei Microsystems – 8ch 216kHz / 24-Bit Asynchronous SRC

[AK4128A]
SM UT E pin,
SM UT E1-4 bit
0 dB
(1)
A tte n u atio n
-∞
(1)
(2)
SDTO
A ll “0 ” c o de
Note: SDTO is identified as SDTO1, SDTO2, SDTO3 and SDTO4.
(1) The soft mute cycle is selected by SMT1-0 pins. (Table 9) The output data is attenuated by −∞ during the soft mute
cycle.
(2) If the soft mute is cancelled before attenuating to −∞, the attenuation is discontinued and returned to 0dB by the same
clock cycles.
Figure 32. Soft Mute Function (Manual Mode) 2. Semi-Auto Mode
When power down of the AK4128A is released (PDN pin = “L” → “H”) with the SMSEMI pin= “H”, the AK4128A enters
semi-auto mode. In this mode, soft mute is cancelled automatically 4410/FSO after a rising edge of PDN (100ms
@FSO=44.1kHz). The soft mute is ON after releasing power down if the SMUTE pin = “H”. The SMSEMI pin must be set
during the PDN pin = “L”.
PDN pin
“L”
S M UT E pin
0 dB
A tte n u atio n
-∞
D o n ’t ca re
4 41 0 /fs o
“L ”
(2 )
(1 )
SDTO
All “0” code
Note: SDTO is identified as SDTO1, SDTO2, SDTO3 and SDTO4.
(1) The output data is attenuated by −∞ during the soft mute cycle (Table 9)
(2) When it is 0dB by a soft mute release after 4410/FSO, it is able to mute or release the mute by the soft mute cycle in
Table 9.
Figure 33. Soft Mute Function (Semi-Auto Mode)
MS1242-E-00
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2010/09