AK4129 AKM [Asahi Kasei Microsystems], AK4129 Datasheet - Page 35

• Manufacturer Part Number: AK4129
• Description: 6ch 216kHz / 24-Bit Asynchronous SRC
• Manufacturer: AKM [Asahi Kasei Microsystems]

■
Clock change timing is shown in
changing the clock, the AK4129 should be reset by the PDN pin in parallel control mode and it should be reset by the PDN
pin or RSTN bit in serial control mode
Note 31. The data on SDTO may cause a clicking noise. To prevent this, set “0” to the SDTI more than 1024/fs (GD) before
Note 32. SMUTE can also remove the clicking noise.
Note 33. (3) is the total time of “Internal circuit power-up + FSO/FSI ratio detection + Internal circuit group delay”.
Note 34. The data on SDTO may cause a clicking noise. To prevent this, set “0” to the SDTI from GD before the PDN pin
Note 35. SMUTE can also remove the clicking noise.
Note 36. The digital block except serial control interface and registers is powered-down. The internal oscillator and
Note 37. (4) is the total time of “0.5/FSI+8/FSI(O)+156/FSO” or “1.5/FSI+8/FSI(O)+156/FSO”. (FSI(O) is lower
MS1173-E-01
Internal Reset Function for Clock Change
the PDN pin changes to “L”. It makes the data on SDTO remain as “0”.
changes to “L”. It makes the data on SDTO remain as “0”.
regulator are not powered-down.
frequency between FSI and FSO)
External clocks
(Input port or Output port)
RSTN bit
(Internal state)
SDTO
SMUTE (Note35,recommended)
Att.Level
External clocks
(Input port
PDN pin
(Internal state)
SDTO
SMUTE (Note32,
Att.Level
or Output port)
recommended)
Figure 36. Clock Change Sequence in Parallel Control Mode (SPB pin = “L”)
Figure 37. Clock Change Sequence in Serial Control Mode (SPB pin = “H”)
-
0dB
∞
dB
-
Figure 36
0dB
∞
Normal operation
Normal data
dB
(Figure
Clocks 1
Normal operation
Normal data
1024/F SO
and
Clocks 1
36). SDTO means SDTO1-3 in this figure.
Figure
1024/FSO
Power-down
Don’t care
(Note
(Note
Note31
37. SDTO is identified as SDTO1, SDTO2 and SDTO3. When
Reset (Note 28)
- 35 -
Don’t care
31)
34)
Note 34
max 23ms
(3)
Clocks 2
(4)
Clocks 2
1024/FSO
Normal operation
Normal data
1024/F SO
Normal operation
Normal data
[AK4129]
2010/09