ak4561 AKM Semiconductor, Inc., ak4561 Datasheet - Page 17

• Manufacturer Part Number: ak4561
• Description: 16bit Codec With Built-in Alc And Mic/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n Register Map
The following registers are reset at PD pin = “L”, then inhibits writing.
Signal Select 1
Rev. 0.9
Addr
0AH Digital Delay 1
0BH Digital Delay 2
Addr
00H Signal Select 1
01H Signal Select 2
02H
03H Mode Control
04H Timer Select
05H ALC Mode Control 1
06H ALC Mode Control 2
07H Operation Mode
08H Input PGA Control
09H Output PGA Control
00H
S0: Select Internal / External MIC (Refer to Figure 11 and Figure 12)
S1: Select HPF-Amp
S2: Select input signal of ALC and change gain table of IPGA.
S4-3: Select input signal of LINEOUT or Analog Volume (OPGA)
S6-5: Select gain of Pre-Amp; +12dB
EQ: Power management of EQ-Amp and Inverter-Amp
Note: Pop noise may occur when EQ or S6-0 bits are changed.
Power Management Control
Signal Select 1
RESET
Register Name
Register Name
0: Internal MIC (RESET)
1: External MIC
0: Disable (RESET)
1: Enable
When S1 bit is “0”, HPF-Amp becomes a unity gain buffer.
When External MIC (S0 bit = “1”) is selected, S1 bit is ignored.
0: MIC (RESET)
1: LINE
ON/OFF of DAC is selected by S3 bit, and ON/OFF of Analog Through Mode is selected by S4
bit.
00: All input signals are OFF. Then output voltage becomes common voltage.
01:DAC (RESET)
10: Analog Through Mode (Output signal of ALC)
11: Output signal of DAC and Analog Through are mixed.
0: OFF. EQ-Amp and Inverter-Amp are always powered-down, then EQ bit is not relative.
1: ON. EQ-Amp and Inverter-Amp are powered-up/down by PM0 bit. (RESET)
FDTM1 FDTM0
DLYE
PM7
EQ
EQ
D7
D7
FS
1
0
0
0
0
0
0
0
Table 1. AK4561 Register Map
S6
Table 2. Pre-Amp Gain Table
+24dB; 4dB step
0
0
1
1
AKM CONFIDENTIAL
IPGA6
VOL2
DLY6
REF6
PM6
D6
D6
S6
S6
0
0
0
0
0
0
- 17 -
S5
0
1
0
1
IPGA5
ZELM
VOL1
ZTM1
DLY5
REF5
PM5
S12
D5
FR
D5
S5
S5
1
0
0
+12dB
+16dB
+20dB
+24dB
Gain
LMAT1 LMAT0 FDATT
OPGA4
COMP
IPGA4
VOL0
ZTM0
DLY4
REF4
PM4
S11
D4
D4
S4
S4
0
0
RESET
MONO1 MONO0 DEM1
OPGA3 OPGA2 OPGA1
WTM1
IPGA3
DLY3
COE3
REF3
PM3
S10
D3
D3
S3
S3
1
0
WTM0
IPGA2
DLY2
COE2
REF2
FDIN
PM2
D2
D2
S2
S2
S9
0
FDOUT
IPGA1
LTM1
RATT
DLY1
COE1
REF1
PM1
D1
D1
S1
S1
S8
0
[AK4561]
OPGA0
2000/09
LMTH
IPGA0
DEM0
LTM0
DLY0
COE0
REF0
PM0
ALC
D0
D0
S0
S0
S7
0