[AK4438]
■ Register Definitions
Addr
00H
Register Name
Control 1
R/W
D7
ACKS
R/W
0
D6
0
D5
0
D4
0
D3
DIF2
R/W
1
D2
DIF1
R/W
1
D1
DIF0
R/W
0
D0
RSTN
R/W
1
R/W
0
R/W
0
R/W
0
Default
RSTN: Internal Timing Reset
0: Reset The DZF pin goes “H” but register values are not initialized.
1: Normal Operation (default)
DIF2-0: Audio Data Interface Modes (Table 9)
Default value is “110” (Mode 6: 32-bit MSB justified).
ACKS: Master Clock Frequency Auto Setting Mode Enable
0: Disable, Manual Setting Mode (default)
1: Enable, Auto Setting Mode
When ACKS bit = “1”, the MCLK frequency is detected automatically.
Addr
01H
Register Name
Control 2
R/W
D7
0
D6
0
D5
SD
R/W
1
D4
DFS1
R/W
0
D3
DFS0
R/W
0
D2
D1
D0
DEM11 DEM10 SMUTE
R/W
0
R/W
0
R/W
0
R/W
1
R/W
0
Default
SMUTE: Soft Mute Enable.
0: Normal Operation (default)
1: DAC outputs soft-muted.
DEM11-0:DAC1 De-emphasis Response (Table 8)
Default value is “01” (OFF).
DFS2-0: Sampling Speed Control (Table 1)
Default value is “000” (Normal Speed).
A click noise occurs when switching DFS2-0 bits setting.
SD: Short delay Filter Enable. (Table 11)
0: Sharp roll off filter or Slow roll off filter
1: Short delay Sharp roll off filter or Short delay Slow roll off filter (default)
016001925-E-00
2016/03
- 53 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
