[AK4685]
Addr
0BH
Register Name
Headphone Control 1
R/W
D7
PTSA
R/W
0
D6
0
RD
0
D5
HPZ
R/W
0
D4
D3
D2
D1
PTS1
R/W
0
D0
PTS0
R/W
0
MOFF HPMTN PTS2
R/W
0
R/W
0
R/W
1
Default
PTS2-0: Headphone-Amp Mute ON/OFF Transition Time
Default: “100”; typ. 16.4ms
HPMTN: Headphone-Amp Mute
0: Mute (default)
1: Normal Output
MOFF: Soft transition for HPMTN bit change
0: Enable (default)
1: Disable
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 50kΩ(typ) to VSS5.
PTSA: MUTE pin/bit Transition Time Setting
0: Fixed (PTS2-0 = “011”) (default)
1: Controlled by PTS2-0 bits
Addr
0CH
Register Name
Headphone Control 2
R/W
D7
0
RD
0
D6
0
RD
0
D5
0
RD
0
D4
D3
D2
D1
D0
HPGA4 HPGA3 HPGA2 HPGA1 HPGA0
R/W
1
R/W
1
R/W
0
R/W
0
R/W
1
Default
HPGA4-0: Headphone-Amp Volume Setting
Default: 19H; 0dB
Refer Table 19.
Addr
10H
Register Name
Headphone Control 3
R/W
D7
0
RD
0
D6
0
RD
0
D5
D4
D3
D2
0
RD
0
D1
0
RD
0
D0
0
RD
0
AMTS2 AMTS1 AMTS0
R/W
0
R/W
0
R/W
0
Default
AMTS2-0: Analog Mute Clock Source Control
Default: “000”; typ. 10.3ms
Refer Table 22.
MS1106-E-00
2009/08
- 47 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
