AK4452 Datasheet, PDF (51/82 Pages) Asahi Kasei Microsystems – 115dB 768kHz 32-bit 2ch Premium DAC

[AK4452]
■ Zero Detection (PCM mode, DSD mode)
When zero detection function is enabled, the DZF pin goes to “H” if the input data at each channel is
continuously zeros for 8192 LRCK cycles. Zero detection channels (AOUTL1N/P and AOUTR1N/P pins) can
be selected by 08H registers (L1 bit, R1 bit). The DZF pin immediately returns to “L” if the input data of each
channel is not zero. If the RSTN bit is “0”, the DZF pins of both channels go to “H”. The DZF pin of both
channels go to “L” after 4 ~ 5/fs when RSTN bit returns to “1”. The DZFB bit can invert the polarity of the
DZF pin. If all channels are disabled, the DZF pin outputs “Not zero”. Zero detection function is disabled when
DSDD bit = “1”.
DZFB bit
Data
DZF pin
0
Not zero
Zero detect
L
H
1
Not zero
Zero detect
H
L
Not zero: One of the zero detection channels set by L1 bit and R1 bit does not detect zero.
Zero detect: All zero detection channels set by L1 bit and R1 bit detect zero.
Table 20. DZF Pin Function
■ LR Channel Output Signal Select (PCM mode, DSD mode)
Select output signal combination of L and R channels by this function.
Input and output signal combination of the AK4452 can be set by MONO1 bit and SELLR1 bit. The output
signal phase of DAC is controlled by INVL and INVR bits. With these settings, sixteen output signal
combinations are available. These settings are available for any audio format.
MONO1 bit
0
0
1
1
SELLR1 bit
0
1
0
1
INVL1 bit
INVR1 bit
0
0
1
0
0
1
1
1
0
0
1
0
0
1
1
1
0
0
1
0
0
1
1
1
0
0
1
0
0
1
1
1
Table 21. Output Select for DAC
L1ch Out
L1ch In
L1ch In Invert
L1ch In
L1ch In Invert
R1ch In
R1ch In Invert
R1ch In
R1ch In Invert
L1ch In
L1ch In Invert
L1ch In
L1ch In Invert
R1ch In
R1ch In Invert
R1ch In
R1ch In Invert
R1ch Out
R1ch In
R1ch In
R1ch In Invert
R1ch In Invert
L1ch In
L1ch In
L1ch In Invert
L1ch In Invert
L1ch In
L1ch In
L1ch In Invert
L1ch In Invert
R1ch In
R1ch In
R1ch In Invert
R1ch In Invert
015002211-E-02
- 51 -
2015/08