ak4538 AKM Semiconductor, Inc., ak4538 Datasheet - Page 55

• Manufacturer Part Number: ak4538
• Description: 16bit ?? Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MS0198-E-01
Addr
Addr
0BH
0CH
0DH
IPGA6-0: Input Analog PGA (see Table 34)
ATTL/R7-0: Digital ATT Output Control (see Table 21)
Default: “10H” (0dB)
When IPGA gain is changed, IPGA6-0 bits should be written while PMMIC bit is “1” and ALC1 bit is “0”. IPGA
gain is reset when PMMIC bit is “0”, and then IPGA operation starts from the default value when PMMIC is
changed to “1”. When ALC1 bit is changed from “1” to “0”, IPGA holds the last gain value set by ALC1 operation.
When IPGA6-0 bits are read, the register values written by the last write operation are read out regardless the
actual gain.
Default: “00H” (0dB)
Register Name
Input PGA Control
Register Name
Lch Digital ATT Control
Rch Digital ATT Control
Default
Default
R/W
R/W
DATA (HEX)
47
46
45
36
10
06
05
04
03
02
01
00
:
:
:
ATTL7
ATTR7
R/W
RD
D7
D7
0
0
0
Table 34. Input Gain Setting
ATTR6
ATTL6
IPGA6
R/W
R/W
GAIN (dB)
D6
D6
0
0
+27.5
+27.0
+26.5
+19.0
+0.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
:
:
:
- 55 -
ATTL5
ATTR5
IPGA5
R/W
R/W
D5
D5
0
0
ATTL4
ATTR4
IPGA4
0.5dB
STEP
R/W
R/W
D4
D4
1
0
ATTR3
ATTL3
IPGA3
R/W
R/W
D3
D3
Default
0
0
ATTR2
ATTL2
IPGA2
R/W
R/W
D2
D2
0
0
ATTR1
ATTL1
IPGA1
R/W
R/W
D1
D1
0
0
[AK4538]
ATTR0
ATTL0
IPGA0
R/W
R/W
2003/5
D0
D0
0
0