[AK4627]
■ Zero Detection
The AK4627 has two pins for zero detect flag outputs. The output pin (DZF1 and DZF2 pins) for zero detection results of
each lineout channels can be selected by DZFM3-0 bits when the PS pin and DZFE pin = “L” (Table 11). Zero detection
mode is set to mode 0 when the DZFE pin= “H” regardless of the PS pin. The DZF1 pin outputs AND result of all six
channels and the DZF2 pin is disabled (“L”) at mode 0.
When the input data of all lineout channels of DZF1 (DZF2) pin are continuously zeros for 8192 LRCK cycles, the DZF1
(DZF2) pin becomes “H”. The DZF1 (DZF2) pin immediately returns to “L” if input data of any channel of DZF1 (DZF2)
pin is not zero.
DZFM
AOUT
Mode
3
2
1
0
L1
R1
L2
R2
L3
R3
0
1
2
3
4
5
6
7
8
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF2
DZF1
DZF1
DZF1
DZF1
DZF1
DZF2
DZF2
DZF1
DZF1
DZF1
DZF1
DZF2
DZF2
DZF2
DZF1
DZF1
DZF1
DZF2
DZF2
DZF2
DZF2
DZF1
DZF1
DZF2
DZF2
DZF2
DZF2
DZF2
DZF1
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
disable (DZF1=DZF2 = “L”)
DZF1
DZF1
(default)
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
9
10
11
12
13
14
15
disable (DZF1=DZF2 = “L”)
Table 11. Zero detect control
MS1278-E-02
2012/03
- 23 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
