|
AK4492ECB Datasheet, PDF (64/101 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC | |||
|
◁ |
[AK4492]
â Zero Detection (PCM Mode, DSD Mode, EXDF Mode)
The AK4492 has a 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 outputs zero detection flag
independently. Polarity of the detection flag of the DZFL/R pin can be selected by DZFB bit. The DZFL/R
pin goes âHâ for zero detection when DZFB bit = â0â, the DZFL/R pin goes âLâ when DZFB bit = â1â.
When DZFB bit = â0â, the DZFL/R pin immediately returns to âLâ if the input data of each channel is not
zero after going to âHâ. If the RSTN bit is â0â, the DZF pins of both L and R channels go to âHâ. The DZFL/R
pin returns to âLâ in 4 ~ 5/fs after the input data of each channel becomes â1â when RSTN bit is set to â1â.
If DZFM bit is set to â1â while DZFB bit = â0â, the DZF pins of both L and R channels go to âHâ 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 âLâ. The zero
detect function is also disabled when Volume Bypass is selected in DSD mode (Table 22).
Table 35. Zero Detect Select.
DZFE DZFB RSTN
Data
0
0
-
-
1
-
-
0
-
0
1
not zero
1
zero detect
0
-
1
1
not zero
zero detect
(-: Do not care)
DZF pin
L
H
H
L
H
L
H
L
016011073-E-00
- 64 -
2016/12
|
▷ |