AK4561 Datasheet, PDF (17/48 Pages) Asahi Kasei Microsystems – 16bit CODEC with built-in ALC and MIC/HP-Amp

ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
n Register Map
The following registers are reset at PD pin = “L”, then inhibits writing.
Addr
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
Register Name
Signal Select 1
Signal Select 2
Power Management Control
Mode Control
Timer Select
ALC Mode Control 1
ALC Mode Control 2
Operation Mode
Input PGA Control
Output PGA Control
Digital Delay 1
Digital Delay 2
D7
D6
D5
D4
EQ
S6
S5
S4
0
0
S12
S11
PM7 PM6 PM5 PM4
FS VOL2 VOL1 VOL0
FDTM1 FDTM0 ZTM1 ZTM0
0
0 ZELM LMAT1
0
REF6 REF5 REF4
0
0
FR COMP
0 IPGA6 IPGA5 IPGA4
0
0
0 OPGA4
DLYE DLY6 DLY5 DLY4
0
0
0
0
Table 1. AK4561 Register Map
D3
D2
S3
S2
S10
S9
PM3 PM2
MONO1 MONO0
WTM1 WTM0
LMAT0 FDATT
REF3 REF2
0
FDIN
IPGA3 IPGA2
OPGA3 OPGA2
DLY3 DLY2
COE3 COE2
D1
S1
S8
PM1
DEM1
LTM1
RATT
REF1
FDOUT
IPGA1
OPGA1
DLY1
COE1
D0
S0
S7
PM0
DEM0
LTM0
LMTH
REF0
ALC
IPGA0
OPGA0
DLY0
COE0
Signal Select 1
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
00H Signal Select 1
EQ
S6
S5
S4
S3
S2
S1
S0
RESET
1
0
1
0
1
0
0
0
S0: Select Internal / External MIC (Refer to Figure 11 and Figure 12)
0: Internal MIC (RESET)
1: External MIC
S1: Select HPF-Amp
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.
S2: Select input signal of ALC and change gain table of IPGA.
0: MIC (RESET)
1: LINE
S4-3: Select input signal of LINEOUT or Analog Volume (OPGA)
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.
S6-5: Select gain of Pre-Amp; +12dB ∼ +24dB; 4dB step
S6
S5
Gain
0
0
+12dB
0
1
+16dB RESET
1
0
+20dB
1
1
+24dB
Table 2. Pre-Amp Gain Table
EQ: Power management of EQ-Amp and Inverter-Amp
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)
Note: Pop noise may occur when EQ or S6-0 bits are changed.
Rev. 0.9
- 17 -
2000/09