[AK4634]
Addr Register Name
D7
PFSDO
R/W
1
D6
D5
D4
0
R
0
D3
SPKG
R/W
0
D2
0
R
0
D1
PFDAC
R/W
0
D0
ADCPF
R/W
1
03H
Signal Select 2
R/W
AOPS MGAIN1
R/W
0
R/W
0
Default
ADCPF: Select of Input signal to Programmable Filter/ALC.
0: SDTI
1: Output of ADC (default)
PFDAC: Select of Input signal to DAC.
0: SDTI (default)
1: Output of Programmable Filter/ALC
SPKG: Select Speaker-Amp Output Gain
0: 0dB (default)
1: +2dB
MGAIN1: Mic-Amplifier Gain Control (Table 20)
MGAIN3-2 and MGAIN0 bits are D3, D2 and D0 of 02H. Default: “0001” (+20.0dB)
AOPS: Mono Line Output Power-Save Mode
0: Normal Operation (default)
1: Power-Save Mode
Power-save mode is enable at AOPS bit = “1”. POP noise at power-up/down can be reduced by changing at
PMAO bit = “1”. (Figure 42)
PFSDO: Select of signal from SDTO
0: Output of ADC (1st - HPF)
1: Output of Programmable Filter/ALC (default)
Addr Register Name
D7
PLL3
R/W
0
D6
PLL2
R/W
0
D5
PLL1
R/W
0
D4
PLL0
R/W
0
D3
D2
D1
DIF1
R/W
1
D0
DIF0
R/W
0
04H
Mode Control 1
R/W
BCKO1 BCKO0
R/W
0
R/W
0
Default
DIF1-0: Audio Interface Format (Table 16)
Default: “10” (MSB First)
BCKO1-0: Select BICK output frequency at Master Mode (Table 9)
Default: “00” (16fs)
PLL3-0: Select input frequency at PLL mode (Table 4)
Default: “0000” (FCK pin)
Rev. 0.5
2007/10
- 64 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
