[AK4480]
■ Zero Detection (PCM and DSD)
The AK4480 has channel-independent zero detect function. When the input data at each channel is continuously zeros for
8192 LRCK cycles, the DZF pin of each channel goes to “H”. The DZF pin of each channel immediately returns to “L” if
the input data of each channel is not zero after becoming “H”. When the RSTN bit is “0”, the DZF pins of both channels
become “H”. The DZF pins of both channels become “L” in 4 ~ 5/fs after RSTN bit returns to “1”. If DZFM bit is set to
“1”, the DZF pins of both channels go to “H” only when the input data for both channels are continuously zeros for 8192
LRCK cycles. The zero detect function can be disabled by setting the DZFE bit. In this case, DZF pins of both channels
are always “L”. The DZFB bit can invert the polarity of the DZF pin.
■ Mono Output (PSM, DSD, Ex DF I/F)
The AK4480 can select input/output for both output channels by setting the MONO bit and SELLR bit. This function is
available for any audio format.
MONO bit
SELLR bit
Lch Out
Rch Out
0
0
1
1
0
1
0
1
Lch In
Rch In
Lch In
Rch In
Rch In
Lch In
Lch In
Rch In
Table 19. MONO Mode Output Select
MS1146-E-03
2012/01
- 27 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
