AK4436 Datasheet, PDF (34/63 Pages) Asahi Kasei Microsystems – 108dB 768kHz 32bit 6-Channel Audio DAC

[AK4436]
■ Digital Filter
Five digital filters are available for playback, providing a choice of different sound colors. These digital
filters are selected by SD bit, SLOW bit and SSLOW bit.
SSLOW
0
0
0
0
1
SD bit SLOW bit
Mode
0
0
Sharp roll-off filter
0
1
Slow roll-off filter
1
0
Short delay Sharp roll-off filter
1
1
Short delay Slow roll-off filter
*
*
Super Slow Roll-off Mode
Table 11. Digital Filter Setting (*: Do not care)
(default)
■ Zero Detection
The AK4436 has channel-independent zero detection function. Zero detection channels (AOUTL1-3 and
AOUTR1-3 pins) can be selected by 07H/08H registers (L1-3 bits, R1-3 bits). When the input data at each
channel is continuously zeros for 8192 LRCK cycles, the DZF pin goes to “H”. 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”.
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 L1-3 bits and R1-3 bits does not detect zero.
Zero detect: All zero detection channels set by L1-3 bits and R1-3 bits detect zero.
Table 12. DZF Pin Function
016001934-E-00
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2016/03