AK4561 Datasheet, PDF (21/48 Pages) Asahi Kasei Microsystems – 16bit CODEC with built-in ALC and MIC/HP-Amp

ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
Mode Control
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
03H Mode Control
FS VOL2 VOL1 VOL0 MONO1 MONO0 DEM1 DEM0
RESET
1
0
1
0
0
0
0
1
DEM1-0: Select De-emphasis Frequency
The AK4561 includes the digital de-emphasis filter (tc = 50/15µs) by IIR filter. The filter
corresponds to three sampling frequencies (32kHz, 44.1kHz and 48kHz). The de-emphasis filter
selected DEM0 and DEM1 registers are enabled for input audio data.
DEM1
DEM0
Mode
0
0
44.1kHz
0
1
OFF
1
0
48kHz
1
1
32kHz
Table 3. De-emphasis Frequencies
MONO1-0: Select digital data of DAC
RESET
MONO1 MONO0 LOUT ROUT
0
0
Lch
Rch
0
1
Lch
Lch
1
0
Rch
Rch
1
1
Rch
Lch
Table 4. Select digital data of DAC
RESET
VOL2-0: LINEOUT Gain Setting
As signal level of LINEOUT is different by VA power supply voltage, a gain of LINEOUT is set
by VOL2-0 bits.
VOL2
0
0
0
0
1
1
1
1
VOL1
VOL0
Gain
VA Voltage
0
0
+8.1dB 2.60 ∼ 2.65V
0
1
+7.8dB 2.65 ∼ 2.75V
1
0
+7.5dB 2.75 ∼ 2.85V
1
1
+7.2dB 2.85 ∼ 2.95V
0
0
+6.9dB 2.95 ∼ 3.05V
0
1
+6.6dB 3.05 ∼ 3.15V
1
0
+6.3dB 3.15 ∼ 3.25V
1
1
+6.0dB 3.25 ∼ 3.30V
Table 5. LINEOUT volume setting
RESET
FS: Select Sampling Frequency
0:fs=32kHz
1:fs=48kHz (RESET)
Recovery period (WTM1-0 bit), zero crossing timeout (ZTM1-0 bit) and FADEIN/FADEOUT period
(FDTM1-0 bit), which can set the same period at fs=32kHz and 48kHz.
Rev. 0.9
- 21 -
2000/09