AK4317 Datasheet, PDF (13/19 Pages) Asahi Kasei Microsystems – 18BIT SCF DAC WITH ATT & MIXER

ASAHI KASEI
2. Output mode
[AK4317]
The AK4317 supports the following output modes.
• _{Normal stereo output}
• _{L/R Reverse output}
• _{Monaural output: L/L, R/R, (L+R)/2}
• _{Output muting with soft mute operation}
When resetting, ATT values of both channels are FFH and the attenuation levels are set 0dB. The output
mode is also set normal stereo output.
S0 S1
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
3. De-emphasis control
S2 S3 AOUT0
AOUT1
0
0
MUTE
MUTE
0
1
MUTE
R
1
0
MUTE
L
1
1
MUTE
(L+R)/2
0
0
R
MUTE
0
1
R
R
1
0
R
L
1
1
R
(L+R)/2
0
0
L
MUTE
0
1
L
R
1
0
L
L
1
1
L
(L+R)/2
0
0
(L+R)/2
MUTE
0
1
(L+R)/2
R
1
0
(L+R)/2
L
1
1
(L+R)/2
(L+R)/2
Table 3 . Output mode
Mode
MUTE
Reverse
Stereo * at RESET
MONO
DEM bit and DEM pin are ORed internally. The de-emphasis(tc=50/15us) corresponding to fs(sampling
frequency)selected by FS0 and FS1 is enabled by setting DEM bit "1" or DEM pin "H". When DEM bit is
"0" and DEM pin is "L", the de-emphasis is disabled and the setting of FS0 and FS1 is invalid. The de-
emphasis is also disabled at FS0="1" and FS1="0". When resetting, DEM bit is set "0". For example,
when the de-emphasis is controlled by only DEM pin at fs=44.1kHz, DEM,FS0,FS1 bits should be "0".
This condition is also set at resetting.
FS0 FS1
mode
0
0
44.1kHz
1
0
OFF
0
1
48kHz
1
1
32kHz
Table 4 .De-emphasis filter setting
(Valid at DEM bit="1" or DEM pin="H")
4. Attenuation control
ATT values of both channels are set Lch ATT data by setting ATC bit "1". In this case, Rch ATT data is
ignored. When resetting, ATC bit is set "0" (individually control).
0172-E-01
- 13 -
1997/5