ak4564 AKM Semiconductor, Inc., ak4564 Datasheet - Page 36

• Manufacturer Part Number: ak4564
• Description: 16bit Codec With Built-in Alc And Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Mode Control
MS0140-E-01
Addr
03H
No.
DEM1-0: Select De-emphasis Frequency
DIF1-0: Select Audio Data Format
VOL1: LOUT1/ROUT1 output volume setting
VOL2: LOUT1/ROUT1 output volume setting
0
1
2
3
Mode Control
DIF1 bit
Default
Register Name
0
0
1
1
The Power supply voltage for LINEOUT-Amp is supplied from HVDD pin. The output level of
LINEOUT is constant regardless of HVDD voltage. When the output voltage of HVDD pin is
low, the distortion of LINEOUT degrades.
The AK4564 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 by DEM0 and DEM1 registers are enabled for input audio data.
DIF0 bit
VOL2-1
VOL1-1
0
1
0
1
0
0
1
1
VOL2-1 VOL2-0 VOL1-1 VOL1-0
D7
0
DEM1
VOL2-0
VOL1-0
I
MSB justified
MSB justified
SDTO(ADC)
LSB justified
2
Table 8. LINEOUT volume setting
0
0
1
1
Table 6. De-emphasis Frequencies
S compatible
0
1
0
1
Table 7. Audio Data Format
D6
1
DEM0
+7.1dB
+6.5dB
+5.9dB
GAIN
0
1
0
1
0dB
- 36 -
D5
0
I
MSB justified
LSB justified
LSB justified
2
SDTI(DAC)
S compatible
AVDD Voltage
44.1kHz
48kHz
32kHz
Mode
D4
OFF
2.6V
2.8V
3.0V
2.8V
1
DIF1
D3
0
Default
BCLK
= 64fs
LINEOUT
-4.5dBV
32fs
32fs
32fs
+2dBV
+2dBV
+2dBV
DIF0
D2
0
Figure 10
Figure 11
Figure 8
Figure 9
Figure
Default
DEM1
D1
0
Default
[AK4564]
DEM0
2002/07
D0
1