ak4561 AKM Semiconductor, Inc., ak4561 Datasheet - Page 21

• Manufacturer Part Number: ak4561
• Description: 16bit Codec With Built-in Alc And Mic/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Mode Control
Rev. 0.9
Addr
03H
DEM1-0: Select De-emphasis Frequency
MONO1-0: Select digital data of DAC
VOL2-0: LINEOUT Gain Setting
FS: Select Sampling Frequency
Mode Control
RESET
Register Name
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.
0:fs=32kHz
1:fs=48kHz (RESET)
The AK4561 includes the digital de-emphasis filter (tc = 50/15 s) 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.
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
MONO1
D7
FS
VOL1
1
DEM1
0
0
1
1
0
0
1
1
0
0
1
1
Table 4. Select digital data of DAC
Table 5. LINEOUT volume setting
0
0
1
1
Table 3. De-emphasis Frequencies
AKM CONFIDENTIAL
VOL2
D6
0
MONO0
VOL0
DEM0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
- 21 -
VOL1
D5
1
LOUT
+8.1dB
+7.8dB
+7.5dB
+7.2dB
+6.9dB
+6.6dB
+6.3dB
+6.0dB
Lch
Lch
Rch
Rch
Gain
44.1kHz
VOL0
48kHz
32kHz
Mode
D4
OFF
0
ROUT
Rch
Lch
Rch
Lch
MONO1 MONO0 DEM1
2.60 2.65V
2.65 2.75V
2.75 2.85V
2.85 2.95V
2.95 3.05V
3.05 3.15V
3.15 3.25V
3.25 3.30V
VA Voltage
D3
0
RESET
RESET
D2
0
RESET
D1
0
[AK4561]
DEM0
2000/09
D0
1