[AK4675]
Addr Register Name
0CH Mode Control 1
R/W
D7
0
RD
0
D6
0
RD
0
D5
MOFF
R/W
0
D4
0
RD
0
D3
PTS1
R/W
0
D2
PTS0
R/W
0
D1
0
RD
0
D0
0
RD
0
Default
PTS1-0: Headphone-Amp Mute ON/OFF Transition Time
Default: “00”; typ. 16.4ms (Table 81)
MOFF: Soft transition for changing HPMTN bit
0: Enable (default)
1: Disable
Addr Register Name
0DH Headphone PGA Control
D7
0
RD
0
D6
HPZ
R/W
0
D5
HPMTN
R/W
0
D4
D3
D2
D1
D0
HPGA4 HPGA3 HPGA2 HPGA1 HPGA0
R/W
1
R/W
Default
R/W
1
R/W
0
R/W
0
R/W
1
HPGA4-0: Headphone-Amp Volume Setting
Default: 19H; 0dB (Table 77)
HPMTN: Headphone-Amp Mute
0: Mute (default)
1: Normal Output
HPZ: Headphone-Amp Pull-down Control
0: Ground Mode (default)
HPL/HPR pins are shorted to VSS3.
1: Hi-Z Mode
HPL/HPR pins are pulled-down by 25kΩ(typ) to VSS3.
Addr Register Name
0EH Speaker PGA Control
R/W
D7
0
RD
0
D6
0
RD
0
D5
D4
D3
D2
D1
D0
SPGA5 SPGA4 SPGA3 SPGA2 SPGA1 SPGA0
R/W
0
R/W
1
R/W
1
R/W
0
R/W
0
R/W
0
Default
SPGA5-0: Speaker-Amp Volume Setting
Default: 18H; 0dB (Table 89)
When PMSPK bit is set to “0”, reading and writing of SPGA5-0 bits are inhibited. When changing from
PMSPK bit = “0” to PMSPK bit = “1”, SPGA volume becomes default value (0dB) regardless of the setting
of SPGA5-0 bits.
Addr Register Name
0FH ALCA Mode Control 1
D7
0
D6
0
D5
D4
D3
D2
D1
D0
REFA5 REFA4 REFA3 REFA2 REFA1 REFA0
R/W
Default
RD
0
RD
0
R/W
1
R/W
1
R/W
1
R/W
1
R/W
0
R/W
0
REFA5-0: Reference value at ALC Recovery Operation
Default: 3CH; +18dB (Table 87)
MS0963-E-00
2008/05
- 172 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
