AKM AKD4633

ASAHI KASEI
[AK4633]
AK4633
16-Bit ∆Σ Mono CODEC with ALC & MIC/SPK-AMP
GENERAL DESCRIPTION
The AK4633 is a 16-bit mono CODEC with Microphone-Amplifier and Speaker-Amplifier. Input circuits
include a Microphone-Amplifier and an ALC (Automatic Level Control) circuit. Output circuits include a
Speaker-Amplifier and Mono Line Output. The AK4633 suits a moving picture of Digital Still Camera and
etc. This speaker-Amplifier supports a Piezo Speaker. The AK4633 is housed in a space-saving 24-pin
QFN package.
FEATURE
1. 16-Bit Delta-Sigma Mono CODEC
2. Recording Function
• 1ch Mono Input
• 1st MIC Amplifier: 0dB, 6dB, 10dB, 14dB, 17dB, 20dB, 26dB or 32dB
• 2nd Amplifier with ALC: +36dB ∼ -54dB, 0.375dB Step, Mute
• ADC Performance (MIC-Amp= +20dB): S/(N+D): 84dB, DR, S/N: 85dB
• Wind Noise Reduction
• Notch Filter
3. Playback Function
• Digital ALC (Automatic Level Control): +36dB ∼ -54dB, 0.375dB Step, Mute
• Mono Line Output Performance: S/(N+D): 85dB, S/N: 93dB
• Mono Speaker-Amp
- Speaker-Amp Performance: S/(N+D): 60dB (150mW@ 8Ω)
Output Noise Level: -87dBV
- BTL Output
- Output Power: 400mW @ 8Ω
• Beep Input
4. Power Management
5. Flexible PLL Mode:
• Frequencies:
11.2896MHz, 12MHz, 12.288MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
1fs (FCK pin)
16fs, 32fs or 64fs (BICK pin)
6. EXT Mode:
• Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
7. Sampling Rate:
• PLL Slave Mode (FCK pin) : 7.35kHz ~ 48kHz
• PLL Slave Mode (BICK pin) : 7.35kHz ~ 48kHz
• PLL Slave Mode (MCKI pin):
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• PLL Master Mode:
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• EXT Slave Mode/EXT Master Mode:
7.35kHz~ 48kHz (256fs), 7.35kHz ~ 26kHz (512fs), 7.35kHz ~ 13kHz (1024fs)
8. Output Master Clock Frequency: 256fs
9. Serial µP Interface: 3-wire
10. Master / Slave Mode
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ASAHI KASEI
[AK4633]
11. Audio Interface Format: MSB First, 2’s compliment
• ADC: DSP Mode, 16bit MSB justified, I2S
• DAC: DSP Mode, 16bit MSB justified, 16bit LSB justified, I2S
12. Ta = -40 ∼ 85°C
13. Power Supply
• AVDD: 2.2 ∼ 3.6V (typ. 3.3V)
• DVDD: 1.6 ∼ 3.6V (typ. 3.3V)
• SVDD: 2.2 ∼ 4.0V (typ. 3.3V)
14. Power Supply Current: 12mA (All Power ON)
15. Package: 24pin QFN(4mmx4mm)
„ Block Diagram
AVSS
AVDD
VCOM
DVDD
DVSS
PMMP
MPI
MIC Power
Supply
PMADC
MIC/MICP
A/D
Mic
HPF
PDN
MIC-Amp
0dB /+6dB/+10dB/+14dB/+17dB
+20dB / +26dB / +32dB
PMPFIL
Audio
I/F
HPF
BICK
2 Band
EQ
FCK
PMAO
Line Out
VOL
(ALC)
AOUT
SDTO
SDTI
PMDAC
Speaker
MCKO
PMPLL
PMSPK
SPP
D/A
PLL
SPN
MCKI
VCOC
Control
Register
PMBP
CSN
CCLK
CDTI
SVDD
SVSS
BEEP/MICN
Figure 1. AK4633 Block Diagram
MS0447-E-03
2006/04
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ASAHI KASEI
[AK4633]
„ Ordering Guide
AK4633VN
AKD4633
24pin QFN (0.5mm pitch)
−40 ∼ +85°C
Evaluation board for AK4633
SPN
SPP
MCKO
MCKI
DVSS
DVDD
18
17
16
15
14
13
„ Pin Layout
SDTO
BEEP/MICN
22
Top View
9
SDTI
MPI
23
8
CDTI
24
7
CCLK
MIC/MICP
6
10
CSN
AK4633VN
5
21
PDN
AOUT
4
FCK
VCOC
11
3
20
AVDD
SVDD
2
BICK
AVSS
12
1
19
VCOM
SVSS
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ASAHI KASEI
[AK4633]
„ Interchange with AK4631
1. Function
Function
AVDD
DVDD
SVDD
MIC Input
MIC Power Output Voltage
MIC-Amp
AK4631
2.6V ∼ 3.6V
2.6V ∼ 3.6V
2.6V ∼ 5.25V
Single-end
0.75 x AVDD
0dB/+20dB/+26dB/+32dB
HPF for Wind Noise Reduction
Notch Filter
ALC for Input Signal
Input Volume
No
No
Analog ALC
+27.5dB ∼ -8dB, 0.5dB Step
ALC for Output Signal
Output Volume
Speaker-Amp block
+12dB ∼ -115dB, 0.5dB Step
Maximum Output for SPK-Amp
(using Piezo Speaker)
MCKI Pull-down Resistance
Package
[email protected]=5V
AK4633
2.2V ∼ 3.6V
1.6V ∼ 3.6V
2.2V ∼ 4.0V
Single-end / differential
0.8 x AVDD
0dB/+6dB/+10dB/+14dB
+17dB/+20dB/+26dB/+32dB
Yes
Yes
Digital ALC (Note 1)
+36dB ∼ -54dB, 0.375dB Step
(Note 1)
Digital Block (Note 1)
+36dB ∼ -54dB, 0.375dB Step
(Note 1)
[email protected]=3.8V
Yes
No (Delete MCKPD bit )
28pin QFN 5.2mm x 5.2mm
24pin QFN 4.0mm x 4.0mm
41pin BGA 4.0mm x 4.0mm
Note 1. ALC and Volume circuits are shared by input and output. Therefore, it is impossible to use ALC and Volume
function at same time for both recording and playback mode.
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ASAHI KASEI
[AK4633]
2. Register Map
(1) AK4631
Addr
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
Register Name
Power Management 1
Power Management 2
Signal Select 1
Signal Select 2
Mode Control 1
Mode Control 2
Timer Select
ALC Mode Control 1
ALC Mode Control 2
Input PGA Control
Digital Volume Control
ALC2 Mode Control
D7
0
0
SPPS
0
PLL3
0
DVTM
0
0
0
OVOL7
0
D6
PMVCM
0
BEEPS
AOPSN
PLL2
0
ROTM
ALC2
REF6
IPGA6
OVOL6
0
D5
PMBP
0
ALC2S
MGAIN1
PLL1
FS3
ZTM1
ALC1
REF5
IPGA5
OVOL5
RFS5
D7
PMPFIL
0
SPPSN
PFSDO
PLL3
ADRST
0
0
IREF7
IVOL7
OVOL7
RGAIN1
VOL7
DATT1
D6
PMVCM
0
BEEPS
AOPS
PLL2
FCKO
0
ALC2
IREF6
IVOL6
OVOL6
LMTH1
VOL6
DATT0
D5
PMBP
0
DACS
MGAIN1
PLL1
FS3
ZTM1
ALC1
IREF5
IVOL5
OVOL5
OREF5
VOL5
SMUTE
D4
PMSPK
0
DACA
SPKG1
PLL0
MSBS
ZTM0
ZELM
REF4
IPGA4
OVOL4
RFS4
D3
PMAO
M/S
DACM
SPKG0
BCKO1
BCKP
WTM1
LMAT1
REF3
IPGA3
OVOL3
RFS3
D2
PMDAC
MCKPD
MPWR
BEEPA
BCKO0
FS2
WTM0
LMAT0
REF2
IPGA2
OVOL2
RFS2
D1
PMMIC
MCKO
MICAD
ALC1M
DIF1
FS1
LTM1
RATT
REF1
IPGA1
OVOL1
RFS1
D0
PMADC
PMPLL
MGAIN0
ALC1A
DIF0
FS0
LTM0
LMTH
REF0
IPGA0
OVOL0
RFS0
D4
D3
PMSPK
PMAO
0
M/S
DACA
0
SPKG1
SPKG0
PLL0
BCKO1
MSBS
BCKP
ZTM0
WTM1
ZELMN
LMAT1
IREF4
IREF3
IVOL4
IVOL3
OVOL4
OVOL3
OREF4
OREF3
VOL4
VOL3
MDIF
EQ2
Digital Filter Setting
Register bits changed from the AK4631.
Register bits added from the AK4631.
D2
PMDAC
0
PMMP
BEEPA
BCKO0
FS2
WTM0
LMAT0
IREF2
IVOL2
OVOL2
OREF2
VOL2
EQ1
D1
0
MCKO
MGAIN2
PFDAC
DIF1
FS1
RFST1
RGAIN0
IREF1
IVOL1
OVOL1
OREF1
VOL1
HPF
D0
PMADC
PMPLL
MGAIN0
ADCPF
DIF0
FS0
RFST0
LMTH0
IREF0
IVOL0
OVOL0
OREF0
VOL0
HPFAD
(2) AK4633
Addr
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
0DH
0EH
Register Name
Power Management 1
Power Management 2
Signal Select 1
Signal Select 2
Mode Control 1
Mode Control 2
Timer Select
ALC Mode Control 1
ALC Mode Control 2
Digital Volume Control
Digital Volume Control
ALC Mode Control 3
ALC LEVEL
Signal Select 3
10H - 1FH
hatching
Bold
MS0447-E-03
2006/04
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ASAHI KASEI
[AK4633]
3. Register Setting
(1) When PLL reference clock is input from FCK or BICK pin, the setting of FS3-0 bits is changed as shown in the
following table.
Mode
FS3 bit
FS2 bit
FS1 bit
0
0
0
Don’t care
0
1
1
Don’t care
1
0
2
Don’t care
Others
Others
ALL of modes are changed from AK4631.
FS0 bit
Don’t care
Don’t care
Don’t care
Sampling Frequency
Range
7.35kHz ≤ fs ≤ 12kHz
12kHz < fs ≤ 24kHz
24kHz < fs ≤ 48kHz
N/A
(2) In EXT Slave Mode, the setting of FS3-0 bits is changed as shown in the following table.
.
Mode
FS3-2 bits
FS1 bit
FS0 bit
MCKI Input
Sampling Frequency
Frequency
Range
Don’t care
0
256fs
0
0
7.35kHz ≤ fs ≤ 48kHz
Don’t care
1
1024fs
1
0
7.35kHz < fs ≤ 13kHz
Don’t care
0
512s
2
1
7.35kHz < fs ≤ 26kHz
Don’t care
1
256fs
3
1
7.35kHz ≤ fs ≤ 48kHz
Hatching parts are the setting changed from AK4631.
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ASAHI KASEI
[AK4633]
PIN / FUNCTION
No.
Pin Name
I/O
1
VCOM
O
2
3
AVSS
AVDD
-
4
VCOC
O
5
PDN
I
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
CSN
CCLK
CDTI
SDTI
SDTO
FCK
BICK
DVDD
DVSS
MCKI
MCKO
SPP
SPN
SVSS
SVDD
AOUT
BEEP
MICN
MPI
MIC
MICP
23
24
I
I
I/O
I
O
I/O
I/O
I
O
O
O
O
I
I
O
I
I
Function
Common Voltage Output Pin, 0.45 x AVDD
Bias voltage of ADC inputs and DAC outputs.
Analog Ground Pin
Analog Power Supply Pin
Output Pin for Loop Filter of PLL Circuit
This pin should be connected to AVSS with one resistor and capacitor in series.
Power-Down Mode Pin
“H”: Power up, “L”: Power down reset and initialize the control register.
AK4633 should always be reset upon power-up.
Chip Select Pin
Control Data Clock Pin
Control Data Input Pin / Output pin
Audio Serial Data Input Pin
Audio Serial Data Output Pin
Frame Clock Pin
Audio Serial Data Clock Pin
Digital Power Supply Pin
Digital Ground Pin
External Master Clock Input Pin
Master Clock Output Pin
Speaker Amp Positive Output Pin
Speaker Amp Negative Output Pin
Speaker Amp Ground Pin
Speaker Amp Power Supply Pin
Mono Line Output Pin
Beep Signal Input Pin
Microphone Negative Input Pin for Differential Input
MIC Power Supply Pin for Microphone
Microphone Input Pin for Single Ended input
Microphone Positive Input Pin for Differential Input
(MDIF bit = “0”)
(MDIF bit = “1”)
(MDIF bit = “0”)
(MDIF bit = “1”)
Note: All input pins except analog input pins (MIC/MICP and BEEP/MICN pins) should not be left floating.
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ASAHI KASEI
[AK4633]
„ Handling of Unused Pin
The unused I/O pins should be processed appropriately as below.
Classification
Analog
Pin Name
MIC/MICP, BEEP/MICN, MPI, AOUT,
SPP, SPN, VCOC
MCKI, SDTI
Setting
These pins should be open.
These pins should be connected to DVSS.
These pins should be connected to DVSS, or should
FCK, BICK (Note)
Digital
be pulled-down/pulled-up by about 100kΩ resister .
MCKO, SDTO
These pins should be open.
(Note) When the AK4633 is used by the slave mode (M/Sbit=“0”), these pins should be connected to DVSS. When the
AK4633 is used by the master mode (M/Sbit=“1”), these pins should be pulled-down or pulled-up by about 100kΩ
resistor.
ABSOLUATE MAXIMUM RATING
(AVSS, DVSS, SVSS=0V; Note 2)
Parameter
Symbol
min
max
Units
Power Supplies:
Analog
AVDD
4.6
V
−0.3
Digital
DVDD
4.6
V
−0.3
Speaker-Amp
SVDD
4.6
V
−0.3
|AVSS – DVSS| (Note 3)
0.3
V
∆GND1
|AVSS – SVSS| (Note 3)
0.3
V
∆GND2
Input Current, Any Pin Except Supplies
IIN
mA
±10
Analog Input Voltage (Note 5)
VINA
AVDD+0.3
V
−0.3
Digital Input Voltage (Note 6)
VIND
DVDD+0.3
V
−0.3
Ambient Temperature (powered applied)
Ta
85
−40
°C
Storage Temperature
Tstg
150
−65
°C
Maximum Power Dissipation (Note 4)
Pd
650
mW
Note 2. All voltages with respect to ground.
Note 3. AVSS, DVSS and SVSS must be connected to the same analog ground plane.
Note 4. In case that PCB wiring density is 100%. This power is the AK4633 internal dissipation that does not include
power of externally connected speaker.
Note 5. BEEP/MICN, MIC/MICP pins
Note 6. PDN, CSN, CCLK, CDTI, SDTI, FCK, BICK, MCKI pins
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
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ASAHI KASEI
[AK4633]
RECOMMENDED OPERATING CONDITIONS
(AVSS, DVSS, SVSS=0V; Note 2)
Parameter
Symbol
min
Power Supplies Analog
AVDD
2.2
(Note 7)
Digital
DVDD
1.6
Speaker-Amp
SVDD
2.2
Difference
DVDD - AVDD
DVDD - SVDD
-
typ
3.3
3.3
3.3
-
max
3.6
3.6
4.0
0.3
0.3
Units
V
V
V
V
V
Note 2. All voltages with respect to ground.
Note 7. The power up sequence between AVDD, DVDD and SVDD is not critical. It is not permit to power DVDD off
only when AVDD or SVDD is powered up. When the power supplies except DVDD are partially powered OFF,
the AK4633 must be reset by bringing PDN pin “L” after these power supplies are powered ON again. If AVDD is
powered off when DVDD is powered up, the PMADC bit should be set to “0” before AVDD is powered off.
* AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
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ASAHI KASEI
[AK4633]
ANALOG CHRACTERISTICS
(Ta=25°C; AVDD, DVDD, SVDD=3.3V; AVSS=DVSS=SVSS=0V; fs=8kHz, BICK=64fs; Signal Frequency=1kHz;
16bit Data; Measurement frequency=20Hz ∼ 3.4kHz; EXT Slave Mode; unless otherwise specified)
Parameter
min
typ
max
Units
MIC Amplifier : MDIF bit = “0”; (Single-ended input)
Input Resistance
20
30
40
kΩ
Gain
0
dB
(MGAIN2-0 bits = “000”)
20
dB
(MGAIN2-0 bits = “001”)
26
dB
(MGAIN2-0 bits = “010”)
32
dB
(MGAIN2-0 bits = “011”)
6
dB
(MGAIN2-0 bits = “100”)
10
dB
(MGAIN2-0 bits = “101”)
14
dB
(MGAIN2-0 bits = “110”)
17
dB
(MGAIN2-0 bits = “111”)
MIC Amplifier : MDIF bit = “1”; (Full-differential input)
Input Voltage
0.228
Vpp
(MGAIN2-0 bits = “001”)
(Note 8)
0.114
Vpp
(MGAIN2-0 bits = “010”)
0.057
Vpp
(MGAIN2-0 bits = “011”)
1.14
Vpp
(MGAIN2-0 bits = “100”)
0.721
Vpp
(MGAIN2-0 bits = “101”)
0.455
Vpp
(MGAIN2-0 bits = “110”)
0.322
Vpp
(MGAIN2-0 bits = “111”)
MIC Power Supply: MPI pin
Output Voltage
(Note 9)
2.38
2.64
2.90
V
Load Resistance
2
kΩ
Load Capacitance
30
pF
ADC Analog Input Characteristics: MIC Æ ADC, MIC Gain=20dB, IVOL=0dB, ALC1bit = “0”
Resolution
16
Bits
Input Voltage (MIC Gain=20dB,Note 10)
0.168
0.198
0.228
Vpp
72
84
dB
S/(N+D)
(−1dBFS) (Note 11)
75
85
dB
D-Range
(−60dBFS)
S/N
75
85
dB
DAC Characteristics:
Resolution
16
Bits
Mono Line Output Characteristics: AOUT pin, DAC → AOUT, RL=10kΩ
1.78
1.98
2.18
Vpp
Output Voltage (Note 12)
73
85
dB
S/(N+D)
(0dBFS) (Note 11)
D-Range
(-60dBFS)
83
93
dB
83
93
dB
S/N
10
Load Resistance
kΩ
30
pF
Load Capacitance
Speaker-Amp Characteristics: DAC Æ SPP/SPN pins, ALC2 bit = “0”, RL=8Ω, BTL, SVDD=3.3V
2.54
3.17
3.80
Vpp
SPKG1-0 bits = “00” (-4.1dBFS)
Output Voltage
3.20
4.00
4.80
Vpp
SPKG1-0 bits = “01” (-4.1dBFS)
S/(N+D)
As 150mW output power
40
60
dB
As 400mW output power
20
dB
-87
dBV
Output Noise
SPKG1-0 bits = “00”
-75
-85
dBV
Level
SPKG1-0 bits = “01”
-83
dBV
SPKG1-0 bits = “10”
Load Resistance
8
Ω
30
pF
Load Capacitance
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ASAHI KASEI
[AK4633]
Parameter
Min
typ
max
Units
Speaker-Amp Characteristics: DAC Æ SPP/SPN pins, ALC2=OFF, CL=3µF, Rserial=10Ω x 2, BTL, SVDD=3.8V
SPKG1-0 bits = “11”
Output Voltage
6.33
Vpp
(-4.1dBFS)
SPKG1-0 bits = “11”
S/(N+D) (Note 13)
60
dB
(-4.1dBFS)
-81
dBV
Output Noise Level (Note 13) SPKG1-0 bits = “11”
Load Impedance (Note 14)
50
Ω
3
Load Capacitance
µF
BEEP Input: BEEP pin, External Input Resistance= 20kΩ
Maximum Input Voltage (Note 15)
1.98
Vpp
Output Voltage (Input Voltage=0.6Vpp)
0.625
1.25
1.875
Vpp
BEEP Æ SPP/SPN (SPKG1-0 bits = “00”)
0.25
0.50
0.75
Vpp
BEEP Æ AOUT
Power Supplies
Power Up (PDN = “H”)
All Circuit Power-up: (Note 17)
AVDD+DVDD
fs=8kHz
8
mA
fs=48kHz
11
17
mA
SVDD: Speaker-Amp Normal Operation (SPPSN bit = “1”, No Output)
SVDD=3.3V
4
12
mA
Power Down (PDN = “L”) (Note 18)
1
100
AVDD+DVDD+SVDD
µA
Note 8. It is a differential value of plus and minus input pin. Each input pins should be connected to the AC coupling
capacitance serially. The differential input is not permission when MGAIN2-0 bits are “000”. The Maximum
input voltage of MICP and MICN pins are proportional to AVDD voltage. Vin= |(MICP) − (MICN)| = 0.069 x
AVDD (max)@MGAIN2-0 bits = “001”,
0.035 x AVDD (max)@MGAIN2-0 bits = “010”, 0.017 x AVDD (max)@MGAIN2-0 bits = “011”,
0.346 x AVDD (max)@MGAIN2-0 bits = “100”, 0.218 x AVDD (max)@MGAIN2-0 bits = “101”,
0.138 x AVDD (max)@MGAIN2-0 bits = “110”, 0.098 x AVDD (max)@MGAIN2-0 bits = “111”,
ADC function is not assumed for using the exceeded input voltage.
Note 9. Output Voltage is proportional to AVDD voltage. Vout = 0.8 x AVDD (typ).
Note 10. Input Voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD (typ).
Note 11. When a PLL reference clock is FCK pin in PLL Slave Mode, S/(N+D):MICÆADC is 75dB (typ) and
S/(N+D):DACÆAOUT is 75dB(typ).
Note 12. Output Voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ).
Note 13. In case of measuring between SPP pin and SPN pin directly.
Note 14. Load impedance is total impedance of series resistance and piezo speaker impedance at 1kHz in Figure 41. Load
capacitance is capacitance of piezo speaker. When piezo speaker is used, 10Ω or more series resistors should be
connected at both SPP and SPN pins, respectively.
Note 15. The maximum input voltage of the BEEP is proportional to AVDD voltage and external input resistance (Rin).
Vout = 0.6 x AVDD x Rin/20kΩ(max).
Note 16. Output Voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ).
Note 17. In case of PLL Master Mode (MCKI=12.288MHz) and PMMP = PMADC = PMDAC = PMPFIL = PMSPK =
PMVCM = PMPLL = MCKO = PMAO = PMBP = PMMP = M/S =“1”. In this case, the output current of MPI
pin is 0mA.
When the AK4633 is EXT mode (PMPLL = MCKO = M/S = “0”), “AVDD+DVDD” is typically [email protected]=8kHz,
[email protected]=48kHz.
Note 18. All digital inputs pins are fixed to DVDD or DVSS.
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ASAHI KASEI
[AK4633]
FILTER CHRACTERISTICS
(Ta = 25°C; AVDD =2.2 ∼ 3.6V, DVDD =1.6 ∼ 3.6V, SVDD =2.2 ∼ 4.0V; fs=8kHz)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
PB
Passband
(Note 19) ±0.16dB
0
3.5
−0.66dB
3.6
−1.1dB
4.0
−6.9dB
Stopband
(Note 19)
SB
4.7
Passband Ripple
PR
Stopband Attenuation
SA
73
Group Delay
(Note 20)
GD
16
Group Delay Distortion
0
∆GD
DAC Digital Filter (Decimation LPF):
PB
Passband
(Note 19)
0
±0.16dB
3.5
−0.54dB
3.6
−1.0dB
4.0
−6.7dB
Stopband
(Note 19)
SB
4.7
Passband Ripple
PR
Stopband Attenuation
SA
73
Group Delay
(Note 20)
GD
16
Group Delay Distortion
0
∆GD
DAC Digital Filter + Analog Filter:
Frequency Response: 0 ∼ 3.4kHz
FR
±1.0
max
Units
3.0
±0.1
-
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
3.0
±0.1
-
kHz
dB
dB
1/fs
µs
-
dB
Note 19. The passband and stopband frequencies are proportional to fs (system sampling rate).
For example, ADC is PB=3.6kHz (@-1.0dB)= 0.45 x fs. A reference of frequency response is 1kHz.
Note 20. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
16-bit data of a channel from the input register to the output register of the ADC.
For the DAC, this time is from setting the 16-bit data of a channel from the input register to the output of analog
signal.
In case of selected the path through the programming filter (1st HPF + 2-band Equalizer + ALC), the Group
Delay should be increased to 2/fs without the phase changing by IIR filter.
DC CHRACTERISTICS
(Ta = 25°C; AVDD =2.2 ∼ 3.6V, DVDD =1.6 ∼ 3.6V, SVDD =2.2 ∼ 4.0V)
Parameter
Symbol
min
High-Level Input Voltage
(DVDD ≥ 2.2V)
VIH
70%DVDD
(DVDD < 2.2V)
80%DVDD
Low-Level Input Voltage
(DVDD ≥ 2.2V)
VIL
(DVDD < 2.2V)
High-Level Output Voltage
(Iout=−80µA)
VOH
DVDD−0.4
Low-Level Output Voltage
(Iout= 80µA)
VOL
Input Leakage Current
Iin
-
MS0447-E-03
typ
-
max
30%DVDD
20%DVDD
0.4
±10
Units
V
V
V
V
V
V
µA
2006/04
- 12 -
ASAHI KASEI
[AK4633]
SWITING CHARACTERISTICS
(Ta = 25°C; AVDD =2.2 ∼ 3.6V, DVDD =1.6 ∼ 3.6V, SVDD =2.2 ∼ 4.0V; CL=20pF)
Parameter
Symbol
min
typ
PLL Master Mode (PLL Reference Clock = MCKI pin) (Figure 2)
MCKI Input: Frequency
Pulse Width Low
Pulse Width High
MCKO Output:
Frequency
Duty Cycle except fs=29.4kHz,32kHz
fs=29.4kHz, 32kHz (Note 21)
FCK Output: Frequency
Pulse width High
(DIF1-0 bits = “00” and FCKO bit = “1”)
max
Units
fCLK
tCLKL
tCLKH
11.2896
0.4/fCLK
0.4/fCLK
-
27.0
-
MHz
ns
ns
fMCK
dMCK
dMCK
fFCK
40
8
256 x fFCK
50
33
-
60
48
kHz
%
%
kHz
tFCKH
-
tBCK
-
ns
dFCK
tBCK
tBCK
tBCK
dBCK
-
50
1/16fFCK
1/32fFCK
1/64fFCK
50
-
%
ns
ns
ns
%
tDBF
tDBF
tBSD
tBSD
tSDH
tSDS
0.5 x tBCK -40
0.5 x tBCK -40
-70
-70
50
50
0.5 x tBCK
0.5 x tBCK
-
0.5 x tBCK + 40
0.5 x tBCK +40
70
70
-
ns
ns
ns
ns
ns
ns
tBFCK
tFSD
-40
-70
-
40
70
ns
ns
tBSD
tSDH
tSDS
-70
50
50
-
70
-
ns
ns
ns
Duty Cycle
(DIF1-0 bits ≠ “00” or FCKO bit = “0”)
BICK: Period (BCKO1-0 = “00”)
(BCKO1-0 = “01”)
(BCKO1-0 = “10”)
Duty Cycle
Audio Interface Timing
DSP Mode: (Figure 3, Figure 4)
FCK “↑” to BICK “↑” (Note 22)
FCK “↑” to BICK “↓” (Note 23)
BICK “↑” to SDTO (BCKP = “0”)
BICK “↓” to SDTO (BCKP = “1”)
SDTI Hold Time
SDTI Setup Time
Except DSP Mode: (Figure 5)
BICK “↓” to FCK Edge
FCK to SDTO (MSB)
(Except I2S mode)
BICK “↓” to SDTO
SDTI Hold Time
SDTI Setup Time
MS0447-E-03
2006/04
- 13 -
ASAHI KASEI
[AK4633]
Parameter
Symbol
min
PLL Slave Mode (PLL Reference Clock: FCK pin) (Figure 6,Figure 7)
FCK: Frequency
DSP Mode: Pulse Width High
Except DSP Mode: Duty Cycle
BICK: Period
Pulse Width Low
Pulse Width High
fFCK
tFCKH
duty
tBCK
tBCKL
tBCKH
7.35
tBCK-60
45
1/64fFCK
0.4 x tBCK
0.4 x tBCK
typ
max
Units
8
-
48
1/fFCK-tBCK
55
1/16fFCK
-
kHz
ns
%
ns
ns
ns
8
1/16fFCK
1/32fFCK
1/64fFCK
-
48
1/fFCK-tBCK
55
-
kHz
ns
%
ns
ns
ns
ns
ns
PLL Slave Mode (PLL Reference Clock: BICK pin) (Figure 6,Figure 7)
FCK: Frequency
DSP Mode: Pulse width High
Except DSP Mode: Duty Cycle
BICK: Period (PLL3-0 = “0001”)
(PLL3-0 = “0010”)
(PLL3-0 = “0011”)
Pulse Width Low
Pulse Width High
fFCK
tFCKH
duty
tBCK
tBCK
tBCK
tBCKL
tBCKH
7.35
tBCK-60
45
0.4 x tBCK
0.4 x tBCK
PLL Slave Mode (PLL Reference Clock: MCKI pin) (Figure 8)
MCKI Input: Frequency
Pulse Width Low
Pulse Width High
MCKO Output:
Frequency
Duty Cycle except fs=29.4kHz, 32kHz
fs=29.4kHz, 32kHz (Note 21)
FCK: Frequency
DSP Mode: Pulse width High
Except DSP Mode: Duty Cycle
BICK: Period
Pulse Width Low
Pulse Width High
Audio Interface Timing
DSP Mode: (Figure 9, Figure 10)
FCK “↑” to BICK “↑” (Note 22)
FCK “↑” to BICK “↓” ()
BICK “↑” to FCK “↑” (Note 22)
BICK “↓” to FCK “↑” ()
BICK “↑” to SDTO (BCKP = “0”)
BICK “↓” to SDTO (BCKP = “1”)
SDTI Hold Time
SDTI Setup Time
Except DSP Mode: (Figure 12)
FCK Edge to BICK “↑” (Note 24)
BICK “↑” to FCK Edge (Note 24)
FCK to SDTO (MSB) (Except I2S mode)
BICK “↓” to SDTO
SDTI Hold Time
SDTI Setup Time
fCLK
fCLKL
fCLKH
11.2896
0.4/fCLK
0.4/fCLK
-
27.0
-
MHz
ns
ns
fMCK
dMCK
dMCK
fFCK
tFCKH
duty
tBCK
tBCKL
tBCKH
40
8
tBCK-60
45
1/64fFCK
0.4 x tBCK
0.4 x tBCK
256 x fFCK
50
33
-
60
48
1/fFCK-tBFCK
55
1/16fFCK
-
kHz
%
%
kHz
ns
%
ns
ns
ns
tFCKB
tFCKB
tBFCK
tBFCK
tBSD
tBSD
tSDH
tSDS
0.4 x tBCK
0.4 x tBCK
0.4 x tBCK
0.4 x tBCK
50
50
-
80
80
-
ns
ns
ns
ns
ns
ns
ns
ns
tFCKB
tBFCK
tFSD
tBSD
tSDH
tSDS
50
50
50
50
-
80
80
-
ns
ns
ns
ns
ns
ns
MS0447-E-03
2006/04
- 14 -
ASAHI KASEI
[AK4633]
Parameter
EXT Slave Mode (Figure 11)
Symbol
min
typ
max
Units
MCKI Frequency: 256fs
512fs
1024fs
Pulse Width Low
Pulse Width High
FCK Frequency (MCKI = 256fs)
(MCKI = 512fs)
(MCKI = 1024fs)
Duty Cycle
BICK Period
BICK Pulse Width Low
Pulse Width High
fCLK
fCLK
fCLK
tCLKL
tCLKH
fFCK
fFCK
fFCK
duty
tBCK
tBCKL
tBCKH
1.8816
3.7632
7.5264
0.4/fCLK
0.4/fCLK
7.35
7.35
7.35
45
312.5
130
130
2.048
4.096
8.192
8
8
8
-
12.288
13.312
13.312
48
26
13
55
-
MHz
MHz
MHz
ns
ns
kHz
kHz
kHz
%
ns
ns
ns
Audio Interface Timing (Figure 12)
FCK Edge to BICK “↑” (Note 24)
BICK “↑” to FCK Edge (Note 24)
FCK to SDTO (MSB) (Except I2S mode)
BICK “↓” to SDTO
SDTI Hold Time
SDTI Setup Time
tFCKB
tBFCK
tFSD
tBSD
tSDH
tSDS
50
50
50
50
-
80
80
-
ns
ns
ns
ns
ns
ns
MS0447-E-03
2006/04
- 15 -
ASAHI KASEI
[AK4633]
Parameter
EXT Master Mode (Figure 2)
Symbol
min
typ
max
Units
MCKI Frequency: 256fs
512fs
1024fs
Pulse Width Low
Pulse Width High
FCK Frequency (MCKI = 256fs)
(MCKI = 512fs)
(MCKI = 1024fs)
Duty Cycle
BICK: Period (BCKO1-0 bit= “00”)
(BCKO1-0 bit= “01”)
(BCKO1-0 bit= “10”)
Duty Cycle
fCLK
fCLK
fCLK
tCLKL
tCLKH
fFCK
fFCK
fFCK
dFCK
tBCK
tBCK
tBCK
dBCK
1.8816
3.7632
7.5264
0.4/fCLK
0.4/fCLK
7.35
7.35
7.35
-
2.048
4.096
8.192
8
8
8
50
1/16fFCK
1/32fFCK
1/64fFCK
50
12.288
13.312
13.312
48
26
13
-
MHz
MHz
MHz
ns
ns
kHz
kHz
kHz
%
ns
ns
ns
%
tDBF
tDBF
tBSD
tBSD
tSDH
tSDS
0.5 x tBCK -40
0.5 x tBCK -40
-70
-70
50
50
0.5 x tBCK
0.5 x tBCK
-
0.5 x tBCK + 40
0.5 x tBCK +40
70
70
-
ns
ns
ns
ns
ns
ns
tBFCK
tFSD
-40
-70
-
40
70
ns
ns
tBSD
tSDH
tSDS
-70
50
50
-
70
-
ns
ns
ns
Audio Interface Timing
DSP Mode: (Figure 3, Figure 4)
FCK “↑” to BICK “↑” (Note 22)
FCK “↑” to BICK “↓” (Note 23)
BICK “↑” to SDTO (BCKP bit= “0”)
BICK “↓” to SDTO (BCKP bit= “1”)
SDTI Hold Time
SDTI Setup Time
Except DSP Mode: (Figure 5)
BICK “↓” to FCK Edge
FCK to SDTO (MSB)
(Except I2S mode)
BICK “↓” to SDTO
SDTI Hold Time
SDTI Setup Time
Note 21. Duty Cycle = (the width of “L” ) / (the period of clock) × 100
Note 22. MSBS, BCKP bits = “00” or “11”
Note 23. MSBS, BCKP bits = “01” or “10”
Note 24. BICK rising edge must not occur at the same time as FCK edge.
MS0447-E-03
2006/04
- 16 -
ASAHI KASEI
Parameter
Control Interface Timing:
CCLK Period
CCLK Pulse Width Low
Pulse Width High
CDTI Setup Time
CDTI Hold Time
CSN “H” Time
CSN “↓“ to CCLK “↑“
CCLK “↑“ to CSN “↑“
CCLK “↓“ to CDTI (at Read Command)
CSN “↑“ to CDTI (Hi-Z) (at Read Command)
Reset Timing
PDN Pulse Width
(Note 25)
PMADC “↑“ to SDTO valid
(Note 26)
ADRST bit = “0”
ADRST bit = “1”
[AK4633]
Symbol
min
typ
max
Units
tCCK
tCCKL
tCCKH
tCDS
tCDH
tCSW
tCSS
tCSH
tDCD
tCCZ
200
80
80
40
40
150
150
50
-
-
70
70
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
tPD
150
-
-
ns
tPDV
tPDV
-
1059
291
-
1/fs
1/fs
Note 25. The AK4633 can be reset by the PDN pin = “L”.
Note 26. This is the count of FCK “↑“ from the PMADC = “1”.
MS0447-E-03
2006/04
- 17 -
ASAHI KASEI
[AK4633]
„ Timing Diagram
1/fCLK
VIH
MCKI
VIL
tCLKH
tCLKL
1/fFCK
50%DVDD
FCK
dFCK
dFCK
1/fMCK
50%DVDD
MCKO
tMCKOH
tMCKOL
dMCK = tMCKOL x fMCK x 100%
Figure 2. Clock Timing (PLL/EXT Master mode) (MCKO isn’t available at EXT Master Mode)
FCK
50%DVDD
tBCK
tDBF
dBCK
BICK
(BCKP = "0")
50%DVDD
BICK
(BCKP = "1")
50%DVDD
tBSD
SDTO
MSB
tSDS
50%DVDD
tSDH
VIH
SDTI
MSB
VIL
Figure 3. Audio Interface Timing (PLL/EXT Master mode & DSP mode: MSBS = “0”)
MS0447-E-03
2006/04
- 18 -
ASAHI KASEI
[AK4633]
FCK
50%DVDD
tBCK
tDBF
dBCK
BICK
(BCKP = "1")
50%DVDD
BICK
(BCKP = "0")
50%DVDD
tBSD
SDTO
50%DVDD
MSB
tSDS
SDTI
tSDH
VIH
MSB
VIL
Figure 4. Audio Interface Timing (PLL/EXT Master mode & DSP mode: MSBS = “1”)
50%DVDD
FCK
tBFCK
dBCK
BICK
50%DVDD
tFSD
tBSD
SDTO
50%DVDD
tSDH
tSDS
VIH
SDTI
VIL
Figure 5. Audio Interface Timing (PLL/EXT Master mode & Except DSP mode)
MS0447-E-03
2006/04
- 19 -
ASAHI KASEI
[AK4633]
1/fFCK
VIH
FCK
VIL
tFCKH
tBFCK
tBCK
VIH
BICK
(BCKP = "0")
VIL
tBCKH
tBCKL
VIH
BICK
(BCKP = "1")
VIL
Figure 6. Clock Timing (PLL Slave mode; PLL Reference Clock = FCK or BICK pin & DSP mode; MSBS = 0)
1/fFCK
VIH
FCK
VIL
tFCKH
tBFCK
tBCK
VIH
BICK
(BCKP = "1")
VIL
tBCKH
tBCKL
VIH
BICK
(BCKP = "0")
VIL
Figure 7. Clock Timing (PLL Slave mode; PLL Reference Clock = FCK or BICK pin & DSP mode; MSBS = 1)
MS0447-E-03
2006/04
- 20 -
ASAHI KASEI
[AK4633]
1/fCLK
VIH
MCKI
VIL
tCLKH
tCLKL
1/fFCK
VIH
FCK
VIL
tFCKH
tFCKL
tBCK
VIH
BICK
VIL
tBCKH
tBCKL
1/fMCK
50%DVDD
MCKO
tMCKOH
tMCKOL
dMCK = tMCKOL x fMCK x 100%
Figure 8. Clock Timing (PLL Slave mode; PLL Reference Clock = MCKI pin & Except DSP mode)
MS0447-E-03
2006/04
- 21 -
ASAHI KASEI
[AK4633]
tFCKH
VIH
FCK
VIL
tFCKB
VIH
BICK
VIL
(BCKP = "0")
VIH
BICK
(BCKP = "1")
VIL
tBSD
SDTO
50%DVDD
MSB
tSDS
tSDH
VIH
SDTI
MSB
VIL
Figure 9. Audio Interface Timing (PLL Slave mode & DSP mode; MSBS = 0)
tFCKH
VIH
FCK
VIL
tFCKB
VIH
BICK
VIL
(BCKP = "1")
VIH
BICK
(BCKP = "0")
VIL
tBSD
SDTO
MSB
tSDS
50%DVDD
tSDH
VIH
SDTI
MSB
VIL
Figure 10. Audio Interface Timing (PLL Slave mode, DSP mode; MSBS = 1)
MS0447-E-03
2006/04
- 22 -
ASAHI KASEI
[AK4633]
1/fCLK
VIH
MCKI
VIL
tCLKH
tCLKL
1/fFCK
VIH
FCK
VIL
tFCKH
tFCKL
tBCK
VIH
BICK
VIL
tBCKH
tBCKL
Figure 11. Clock Timing (EXT Slave mode)
VIH
FCK
VIL
tBFCK
tFCKB
VIH
BICK
VIL
tBSD
tFSD
SDTO
MSB
50%DVDD
tSDH
tSDS
VIH
SDTI
VIL
Figure 12. Audio Interface Timing (PLL, EXT Slave mode & Except DSP mode)
MS0447-E-03
2006/04
- 23 -
ASAHI KASEI
[AK4633]
VIH
CSN
VIL
tCCKL
tCSS
tCCKH
VIH
CCLK
VIL
tCCK
tCDH
tCDS
VIH
CDTI
C1
C0
R/W
VIL
Figure 13. WRITE Command Input Timing
tCSW
VIH
CSN
VIL
tCSH
VIH
CCLK
VIL
VIH
CDTI
D2
D1
D0
VIL
Figure 14. WRITE Data Input Timing
MS0447-E-03
2006/04
- 24 -
ASAHI KASEI
[AK4633]
VIH
CSN
VIL
VIH
CCLK
VIL
tCCZ
tDCD
CDTI
D3
D2
D1
50%
DVDD
D0
Figure 15 . Read Data Output Timing
PMADC
bit
tPDV
SDTO
50%DVDD
Figure 16. Power Down & Reset Timing 1
tPD
PDN
VIL
Figure 17. Power Down & Reset Timing 2
MS0447-E-03
2006/04
- 25 -
ASAHI KASEI
[AK4633]
OPERATION OVERVIEW
„ System Clock
There are the following four clock modes to interface with external devices (Table 1 and Table 2).
Mode
PMPLL bit M/S bit
PLL3-0 bit
PLL Master Mode
1
1
Table 4
PLL Slave Mode 1
1
0
Table 4
(PLL Reference Clock: MCKI pin)
PLL Slave Mode 2
1
0
Table 4
(PLL Reference Clock: FCK or BICK pin)
EXT Slave Mode
0
0
X
EXT Master Mode
0
1
X
Table 1. Clock Mode Setting (X: Don’t care)
Mode
PLL Master Mode
PLL Slave Mode 1
(PLL Reference Clock: MCKI pin)
PLL Slave Mode 2
(PLL Reference Clock: FCK or BICK pin)
EXT Slave Mode
EXT Master Mode
Figure
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
MCKO bit
MCKO pin
MCKI pin
BICK pin
FCK pin
0
“L” Output
1
256fs Output
Master Clock
Input for PLL
(Note 27)
16fs/32fs/64fs
Output
1fs
Output
0
“L” Output
1
256fs Output
Master Clock
Input for PLL
(Note 27)
16fs/32fs/64fs
Input
1fs
Input
0
“L” Output
GND
16fs/32fs/64fs
Input
1fs
Input
256fs/
512fs/
≥ 32fs
0
“L” Output
1024fs
Input
Input
256fs/
512fs/
32fs/64fs
0
“L” Output
1024fs
Output
Input
Note 27. 11.2896MHz/12MHz/12.288MHz/13.5MHz/24MHz/27MHz
Table 2. Clock pins state in Clock Modes
MS0447-E-03
1fs
Input
1fs
Output
2006/04
- 26 -
ASAHI KASEI
[AK4633]
„ Master Mode/Slave Mode
The M/S bit selects either master or slave modes. M/S bit = “1” selects master mode and “0” selects slave mode. When the
AK4633 is power-down mode (PDN pin = “L”) and exits reset state, the AK4633 is slave mode. After exiting reset state,
the AK4633 goes master mode by changing M/S bit = “1”.
When the AK4633 is used by master mode, FCK and BICK pins are a floating state until M/S bit becomes “1”. FCK and
BICK pins of the AK4633 should be pulled-down or pulled-up by about 100kΩ resistor externally to avoid the floating
state.
M/S bit
Mode
0
Slave Mode
Default
1
Master Mode
Table 3. Select Master/Salve Mode
„ PLL Mode
When PMPLL bit is “1”, a fully integrated analog phase locked loop (PLL) generates a clock that is selected by the
PLL3-0 and FS3-0 bits. The PLL lock time is shown in Table 4, whenever the AK4633 is supplied to a stable clocks after
PLL is powered-up (PMPLL bit = “0” → “1”) or sampling frequency changes.
1) Setting of PLL Mode
PLL
PLL
R and C of VCOC
Input
Reference
Lock
pin(Note
28)
Mode
Frequency
Clock Input
Time
C[F]
R[Ω]
Pin
(max)
0
0
0
0
0
FCK pin
1fs
6.8k
220n
160ms
Default
1
0
0
0
1
BICK pin
16fs
10k
4.7n
2ms
2
0
0
1
0
BICK pin
32fs
10k
4.7n
2ms
3
0
0
1
1
BICK pin
64fs
10k
4.7n
2ms
4
0
1
0
0
MCKI pin
11.2896MHz
10k
4.7n
40ms
5
0
1
0
1
MCKI pin
12.288MHz
10k
4.7n
40ms
6
0
1
1
0
MCKI pin
12MHz
10k
4.7n
40ms
7
0
1
1
1
MCKI pin
24MHz
10k
4.7n
40ms
12
1
1
0
0
MCKI pin
13.5MHz
10k
10n
40ms
13
1
1
0
1
MCKI pin
27MHz
10k
10n
40ms
Others
Others
N/A
Note 28. The tolerance of R is ±5%, C is ±30%.
Table 4. Setting of PLL Mode (*fs: Sampling Frequency)
2) Setting of sampling frequency in PLL Mode.
When PLL2 bit is “1” (PLL reference clock input is MCKI pin), the sampling frequency is selected by FS2-0 bits as
defined in Table 5.
Mode
FS3 bit
FS2 bit
FS1 bit
FS0 bit
Sampling Frequency
0
0
0
0
0
8kHz
Default
1
0
0
0
1
12kHz
2
0
0
1
0
16kHz
3
0
0
1
1
24kHz
4
0
1
0
0
7.35kHz
5
0
1
0
1
11.025kHz
6
0
1
1
0
14.7kHz
7
0
1
1
1
22.05kHz
10
1
0
1
0
32kHz
11
1
0
1
1
48kHz
14
1
1
1
0
29.4kHz
15
1
1
1
1
44.1kHz
Others
Others
N/A
Table 5. Setting of Sampling Frequency at PLL2 bit = “1” and PMPLL bit = “1”
PLL3
bit
PLL2
bit
PLL1
bit
PLL0
bit
MS0447-E-03
2006/04
- 27 -
ASAHI KASEI
[AK4633]
When PLL2 bit is “0”(PLL reference clock input is FCK or BICK pin), the sampling frequency is selected by FS3-2 bits
(Table 6).
Mode
0
1
2
Others
FS3 bit
FS2 bit
Sampling Frequency
Range
0
0
Don’t care Don’t care
7.35kHz ≤ fs ≤ 12kHz
0
1
Don’t care Don’t care
12kHz < fs ≤ 24kHz
1
0
Don’t care Don’t care
24kHz < fs ≤ 48kHz
Others
N/A
Table 6. Setting of Sampling Frequency at PLL2 bit = “0” and PMPLL bit = “1”
FS1 bit
FS0 bit
Default
„ PLL Unlock State
1) PLL Master Mode (PMPLL bit = “1”, M/S bit = “1”)
In this mode, after PMPLL bit = “0” Æ “1” and until PLL locked , “L” are output from BICK and FCK pins and invalid
frequency clock is output from MCKO pin when MCKO bit is “1”. If MCKO bit is “0”, “L” is output from MCKO pin.
( Table 7)
In case that sampling frequency is changed, setting PMPLL bit to “0” once a time could be prevent BICK and FCK pins
output to “L” from unstable clocks.
MCKO pin
BICK pin
FCK pin
MCKO bit = “0” MCKO bit = “1”
Invalid
Invalid
Invalid
After that PMPLL bit “0” Æ “1”
“L” Output
PLL Unlock
Invalid
“L” Output
“L” Output
“L” Output
PLL Lock
256fs Output
1fs Output
See Table 9
“L” Output
Table 7. Clock Operation at PLL Master Mode (PMPLL bit = “1”, M/S bit = “1”)
PLL State
2) PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
In this mode, an invalid clock is output from MCKO pin after PMPLL bit = “0” Æ “1” or sampling frequency is changed.
After that, 256fs clock is output from MCKO pin while PLL is locked. However, the normal data couldn’t output from
ADC and DAC while PLL is unlocked. For DAC, the output signal should be muted by setting “0” to DACA and DACM
bits in Addr=02H.
MCKO pin
MCKO bit = “0”
MCKO bit = “1”
Invalid
After that PMPLL bit “0” Æ “1”
“L” Output
PLL Unlock
Invalid
“L” Output
PLL Lock
256fs
Output
“L” Output
Table 8. Clock Operation at PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
PLL State
MS0447-E-03
2006/04
- 28 -
ASAHI KASEI
[AK4633]
„ PLL Master Mode (PMPLL bit = “1”, M/S bit = “1”)
When an external clock (11.2896MHz, 12MHz , 12.288MHz, 13.5MHz, 24MHz or 27MHz) is input to MCKI pin, the
MCKO, BICK and FCK clocks are generated by an internal PLL circuit. The MCKO output frequency is fixed to 256fs,
the output is enabled by MCKO bit. The BICK is selected among 16fs, 32fs or 64fs, by BCKO1-0 bits (Table 9).
As the DSP mode, the FCK pin is output as 50% duty or 1 BICK period high output by FCK bit (Note 11). In addition to
DSP mode, FCK bit should be set to “0”.
When BICK output frequency is 16fs, the audio interface format supports only Mode 0 (DSP Mode).
11.2896MHz, 12MHz, 12.288MHz
13.5MHz, 24MHz, 27MHz
AK4633
DSP or µ P
MCKI
MCKO
BICK
FCK
256fs
16fs, 32fs, 64fs
1fs
MCLK
BCLK
FCK
SDTO
SDTI
SDTI
SDTO
Figure 18. PLL Master Mode
Mode
0
1
2
3
Mode
0
1
BICK Output
Frequency
0
0
16fs
Default
0
1
32fs
1
0
64fs
1
1
N/A
Table 9. BICK Output Frequency at PLL Master Mode
BCKO1
BCKO0
FCKO
FCK Output
0
Duty = 50%
Default
1
High Width = 1/fBCK
fBCK is the output frequency of BICK
Table 10. FCK Output at PLL Master Mode and DSP Mode
MS0447-E-03
2006/04
- 29 -
ASAHI KASEI
[AK4633]
„ PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
A reference clock of PLL is selected among the input clocks to MCKI, BICK or FCK pin. The required clock to the
AK4633 is generated by an internal PLL circuit. Input frequency is selected by PLL3-0 bits. When BICK input frequency
is 16fs, the audio interface format supports only Mode 0(DSP Mode).
a) PLL reference clock: MCKI pin
BICK and FCK inputs should be synchronized with MCKO output. The phase between MCKO and FCK dose not
matter. Sampling frequency can be selected by FS3-0 bits(Table 5).
11.2896MHz, 12MHz, 12.288MHz
13.5MHz, 24MHz, 27MHz
AK4633
DSP or µP
MCKI
MCKO
BICK
FCK
256fs
16fs, 32fs, 64fs
1fs
MCLK
BCLK
FCK
SDTO
SDTI
SDTI
SDTO
Figure 19. PLL Slave Mode1 (PLL Reference Clock: MCKI pin)
b) PLL reference clock: BICK or FCK pin
In case of using BICK or FCK as PLL reference clock, the sampling frequency corresponds to 7.35kHz to 48kHz by
FS3-0 bits(Table 6).
AK4633
DSP or µP
MCKO
MCKI
BICK
FCK
16fs, 32fs, 64fs
1fs
BCLK
FCK
SDTO
SDTI
SDTI
SDTO
Figure 20. PLL Slave Mode 1 (PLL Reference Clock: FCK or BICK pin)
The external clocks (MCKI, BICK and FCK) should always be present whenever the ADC or DAC or Programmable
Filter are in operation (PMADC bit = “1” or PMDAC bit = “1” or PMPFIL bit = “1”). If these clocks are not provided, the
AK4633 may draw excess current and it is not possible to operate properly because utilizes dynamic refreshed logic
internally. If the external clocks are not present, the ADC, DAC and Programmable Filter should be in the power-down
mode (PMADC bit =PMDAC bit = PMPFIL bit = “0”).
MS0447-E-03
2006/04
- 30 -
ASAHI KASEI
[AK4633]
„ EXT Slave Mode (PMPLL bit = “0”, M/S bit = “0”)
When PMPLL bit is “0” and M/S bit is “0”, the AK4633 becomes EXT slave mode. Master clock is input from MCKI pin,
the internal PLL circuit is not operated. This mode is compatible with I/F of the normal audio CODEC. The clocks
required to operate are MCKI (256fs, 512fs or 1024fs), BICK (≥32fs) and FCK (fs). The master clock (MCKI) should be
synchronized with FCK. The phase between these clocks does not matter. The input frequency of MCKI is selected by
FS3-0 bits ( Table 11).
Mode
0
1
2
3
FS3-2 bits
FS1 bit
FS0 bit
MCKI Input
Sampling Frequency
Frequency
Range
Don’t care
0
256fs
0
7.35kHz ≤ fs ≤ 48kHz Default
Don’t care
1
1024fs
0
7.35kHz < fs ≤ 13kHz
Don’t care
0
512s
1
7.35kHz < fs ≤ 26kHz
Don’t care
1
256fs
1
7.35kHz < fs ≤ 48kHz
Table 11. Setting MCKI Frequency at EXT Slave Mode (PMPLL bit = “0”, M/S bit = “0”)
External Slave Mode does not support Mode 0 (DSP Mode) of Audio Interface Format.
The S/N of the DAC at low sampling frequencies is worse than at high sampling frequencies due to out-of-band noise.
When the out-of-band noise can be improved by using higher frequency of the master clock. The S/N of the DAC output
through AOUT amp at fs=8kHz is shown in Table 12.
S/N
(fs=8kHz, 20kHzLPF + A-weighted)
256fs
84dB
512fs
92dB
1024fs
92dB
Table 12. Relationship between MCKI and S/N of AOUT
MCKI
The external clocks (MCKI, BICK and FCK) should always be present whenever the ADC or DAC or Programmable
Filter are in operation (PMADC bit = “1” or PMDAC bit = “1” or PMPFIL bit = “1”). If these clocks are not provided, the
AK4633 may draw excess current and it is not possible to operate properly because utilizes dynamic refreshed logic
internally. If the external clocks are not present, the ADC, DAC and Programmable Filter should be in the power-down
mode (PMADC bit =PMDAC bit = PMPFIL bit = “0”).
AK4633
DSP or µP
MCKO
256fs, 512fs or 1024fs
MCKI
BICK
FCK
MCLK
32fs, 64fs
1fs
BCLK
FCK
SDTO
SDTI
SDTI
SDTO
Figure 21. EXT Slave Mode
MS0447-E-03
2006/04
- 31 -
ASAHI KASEI
[AK4633]
„ EXT Master Mode (PMPLL bit = “0”, M/S bit = “1”)
When PMPLL bit is “0” and M/S bit is “1”, the AK4633 becomes clock master mode(EXT Master Mode). Master clock is
input from MCKI pin, the internal PLL circuit is not operated. The clock required to operate is MCKI (256fs, 512fs or
1024fs). The input frequency of MCKI is selected by FS3-0 bits (Table 11). The output frequency of BICK is selected to
32fs or 64fs by setting BCKO1-0 bit (Table 14). FCK bit should be set to “0”.
Mode
0
1
2
3
FS3-2 bits
FS1 bit
FS0 bit
MCKI Input
Sampling Frequency
Frequency
Range
Don’t care
0
256fs
0
7.35kHz ≤ fs ≤ 48kHz Default
Don’t care
1
1024fs
0
7.35kHz < fs ≤ 13kHz
Don’t care
0
512s
1
7.35kHz < fs ≤ 26kHz
Don’t care
1
256fs
1
7.35kHz < fs ≤ 48kHz
Table 13. Setting MCKI Frequency at EXT Slave Mode (PMPLL bit = “0”, M/S bit = “1”)
External Master Mode does not support Mode 0 (DSP Mode) of Audio Interface Format.
MCKI should always be present whenever the ADC or DAC or Programmable Filter is in operation (PMADC bit = “1” or
PMDAC bit = “1” or PMPFIL bit = “1”). If MCKI is not provided, the AK4633 may draw excess current and it is not
possible to operate properly because utilizes dynamic refreshed logic internally. If MCKI is not present, the ADC, DAC
and Programmable Filter should be in the power-down mode (PMADC bit =PMDAC bit = PMPFIL bit = “0”).
AK4633
DSP or µP
MCKO
256fs, 512fs or 1024fs
MCKI
BICK
FCK
MCLK
32fs, 64fs
1fs
BCLK
FCK
SDTO
SDTI
SDTI
SDTO
Figure 22. EXT Master Mode
Mode
0
1
2
3
BICK Output
Frequency
0
0
N/A
Default
0
1
32fs
1
0
64fs
1
1
N/A
Table 14. BICK Output Frequency at EXT Master Mode
BCKO1
BCKO0
MS0447-E-03
2006/04
- 32 -
ASAHI KASEI
[AK4633]
„ Audio Interface Format
Four types of data formats are available and are selected by setting the DIF1-0 bits (Table 15). In all modes, the serial data
is MSB first, 2’s complement format. Audio interface formats can be used in both master and slave modes. FCK and
BICK are output from AK4633 in master mode, but must be input to AK4633 in slave mode.
In Mode 1-3, the SDTO is clocked out on the falling edge of BICK and the SDTI is latched on the rising edge.
Mode
0
1
2
3
DIF1
0
0
1
1
DIF0
0
1
0
1
SDTO (ADC)
SDTI (DAC)
BICK
DSP Mode
DSP Mode
≥ 16fs
MSB justified
LSB justified
≥ 32fs
MSB justified
MSB justified
≥ 32fs
I2S compatible I2S compatible
≥ 32fs
Table 15. Audio Interface Format
Figure
Table 16
Figure 23
Figure 24
Figure 25
Default
In Mode0 (DSP mode), the audio I/F timing is changed by BCKP and MSBS bits.
When BCKP bit is “0”, SDTO data is output by rising edge of BICK, SDTI data is latched by falling edge of BICK.
When BCKP bit is “1”, SDTO data is output by falling edge of BICK, SDTI data is latched by rising edge of BICK.
MSB data position of SDTO and SDTI can be shifted by MSBS bit. The shifted period is a half of BICK.
MSBS bit BCKP bit
Audio Interface Format
0
0
Figure 26
0
1
Figure 27
1
0
Figure 28
1
1
Figure 29
Table 16. Audio Interface Format in Mode 0
Default
If 16-bit data that ADC outputs is converted to 8-bit data by removing LSB 8-bit, “−1” at 16bit data is converted to “−1” at
8-bit data. And when the DAC playbacks this 8-bit data, “−1” at 8-bit data will be converted to “−256” at 16-bit data and
this is a large offset. This offset can be removed by adding the offset of “128” to 16-bit data before converting to 8-bit
data.
FCK
0
1
2
8
3
9
10
11
12
13
14
15
0
1
2
3
8
9
10
11
12
13
14
15
0
1
BICK(32fs)
SDTO(o)
15 14 13
SDTI(i)
15 14 13
0
1
2
8
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
3
14
15
16
17
18
31
15
15
Don’t Care
0
1
2
3
14
15
16
17
18
31
0
1
BICK(64fs)
SDTO(o)
SDTI(i)
15 14 13
2
1
Don’t Care
0
15
15 14
1
0
Don’t Care
15:MSB, 0:LSB
Data
1/fs
Figure 23. Mode 1 Timing
MS0447-E-03
2006/04
- 33 -
ASAHI KASEI
[AK4633]
FCK
0
1
2
8
9
10
11
12
13
14
15
0
1
2
8
9
10
11
12
13
14
15
0
1
BICK(32fs)
SDTO(o)
15 14
8
7
6
5
4
3
2
1
0
SDTI(I)
15 14
8
7
6
5
4
3
2
1
0
0
1
2
3
14
15
16
17
18
31
15
15
Don’t Care
0
1
2
3
14
14
15
16
17
18
31
0
1
BICK(64fs)
SDTO(o)
15 14 13
13 2
1
0
SDTI(i)
15 14 13
13 2
1
0
15
Don’t Care
Don’t Care
15
15:MSB, 0:LSB
Data
1/fs
Figure 24. Mode 2 Timing
FCK
0
1
2
3
4
9
10
11
12
13
14
15
0
1
2
3
1
2
3
4
9
10
11
12
13
14
15
16
17
18
14
15
0
1
31
0
1
BICK(32fs)
SDTO(o)
15 14 13
SDTI(i)
15 14 13
0
1
2
3
4
7
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
14
15
16
17
18
31
0
4
BICK(64fs)
SDTO(o)
15 14 13
2
1
0
SDTI(i)
15 14 13
2
1
0
15:MSB, 0:LSB
Don’t Care
Don’t Care
Data
1/fs
Figure 25. Mode 3 Timing
MS0447-E-03
2006/04
- 34 -
ASAHI KASEI
[AK4633]
FCK
15
0
1
8
2
8
9
10
11
12
13
14
15
0
1
8
2
8
9
10
11
12
13
14
15
0
BICK(16fs)
SDTO(o)
0
15 14
SDTI(i)
0
15 14
15
0
1
8
8
7
6
5
4
3
2
1
0
15 14
8
7
6
5
4
3
2
1
0
15 14
8
2
14
15
16
17
18
29
30
31
0
1
8
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
8
2
8
9
10
11
12
13
30
31
0
15
0
BICK(32fs)
SDTO(o)
15 14
SDTI(i)
15 14
8
2
1
0
2
1
0
Don’t Care
15 14
8
2
1
0
15 14
8
2
1
0
1/fs
Don’t Care
1/fs
15:MSB, 0:LSB
Figure 26. Mode 0 Timing (BCKP = “0”, MSBS = “0”)
FCK
15
0
1
8
2
8
9
10
11
12
13
14
15
0
1
8
2
8
9
10
11
12
13
14
BICK(16fs)
SDTO(o)
0
15 14
SDTI(i)
0
15 14
15
0
1
8
8
7
6
5
4
3
2
1
0
15 14
8
7
6
5
4
3
2
1
0
15 14
8
2
14
15
16
17
18
29
30
31
0
1
8
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
8
2
8
9
10
11
12
13
30
31
0
BICK(32fs)
SDTO(o)
15 14
SDTI(i)
15 14
8
2
1
0
2
1
0
Don’t Care
15 14
8
2
1
0
15 14
8
2
1
0
1/fs
Don’t Care
1/fs
15:MSB, 0:LSB
Figure 27. Mode 0 Timing (BCKP = “1”, MSBS = “0”)
MS0447-E-03
2006/04
- 35 -
ASAHI KASEI
[AK4633]
FCK
15
0
1
8
2
8
9
10
11
12
13
14
15
0
1
8
2
8
9
10
11
12
13
14
15
0
BICK(16fs)
SDTO(o)
0
15 14
SDTI(i)
0
15 14
15
0
1
8
8
7
6
5
4
3
2
1
0
15 14
8
7
6
5
4
3
2
1
0
15 14
8
2
14
15
16
17
18
29
30
31
0
1
8
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
8
2
8
9
10
11
12
13
30
31
0
15
0
BICK(32fs)
SDTO(o)
15 14
SDTI(i)
15 14
8
2
1
0
2
1
0
Don’t Care
15 14
8
2
1
0
15 14
8
2
1
0
1/fs
Don’t Care
1/fs
15:MSB, 0:LSB
Figure 28. Mode 0 Timing (BCKP = “0”, MSBS = “1”)
FCK
15
0
1
8
2
8
9
10
11
12
13
14
15
0
1
8
2
8
9
10
11
12
13
14
BICK(16fs)
SDTO(o)
0
15 14
SDTI(i)
0
15 14
15
0
1
8
8
7
6
5
4
3
2
1
0
15 14
8
7
6
5
4
3
2
1
0
15 14
8
2
14
15
16
17
18
29
30
31
0
1
8
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
8
2
8
9
10
11
12
13
30
31
0
BICK(32fs)
SDTO(o)
15 14
SDTI(i)
15 14
8
2
1
0
2
1
0
Don’t Care
15 14
8
2
1
0
15 14
8
2
1
0
1/fs
Don’t Care
1/fs
15:MSB, 0:LSB
Figure 29. Mode 0 Timing (BCKP = “1”, MSBS = “1”)
MS0447-E-03
2006/04
- 36 -
ASAHI KASEI
[AK4633]
„ System Reset
Upon power-up, reset the AK4633 by bringing the PDN pin = “L”. This ensures that all internal registers reset to their
initial values.
The ADC enters an initialization cycle that starts when the PMADC bit is changed from “0” to “1”. The initialization cycle
time is selected by ADRST bit (Table 17). During the initialization cycle, the ADC digital data outputs of both channels
are forced to a 2's compliment, “0”. The ADC output reflects the analog input signal after the initialization cycle is
complete. The DAC does not require an initialization cycle.
(Note) The initial data of ADC has the offset data that depends on the condition of the microphone and the cut-off
frequency of HPF. If this offset isn’t small, the longer initialization cycle should be selected as ADRSTbit=“0” in
order to prevent the offset data. Or, do not use the initial data of ADC.
ADRST bit
0
1
Init Cycle
Cycle
fs = 8kHz
fs = 16kHz
1059/fs
132.4ms
66.2ms
291/fs
36.4ms
18.2ms
Table 17. Initialization cycle of ADC
fs = 48kHz
22.1ms
6.1ms
„ MIC Gain Amplifier
The AK4633 has a Gain Amplifier for Microphone input. This gain is selected by MGAIN2-0 bits. The typical input
impedance is 30kΩ.
MGAIN2 bit
0
0
0
0
1
1
1
1
MGAIN1 bit MGAIN0 bit
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
Table 18. Input Gain
MS0447-E-03
Input Gain
0dB
+20dB
+26dB
+32dB
+6dB
+10dB
+14dB
+17dB
Default
2006/04
- 37 -
ASAHI KASEI
[AK4633]
„ MIC Power
The MPI pin supplies power for the Microphone. This output voltage scales with 0.8 x AVDD (typ) and the load
resistance is minimum 2kΩ. Don’t connect the capacitor directly to MPI pin
AK4633
MPI pin
MIC-Power
≥ 2k
Audio
MIC pin
A/D
HPF
I/F
MIC-Amp
BICK pin
FCK pin
STDO pin
Figure 30. MIC Block Circuit
„ MIC Differential Input
The MIC input becomes an differential input when MDIF bit is “1”. The input pins are MIC and MICP pins. At this time,
the MICP pin couldn’t be used for an BEEP input. When MDIF bit is “1”, the PMBP, BEEPA and BEEPS bits should be
set to “0”.
AK4633
MIC-Power
MPI pin
1k
MICP pin
Audio
MICN pin
A/D
MIC-Amp
HPF
I/F
BICK pin
FCK pin
STDO pin
1k
Figure 31. MIC Differential Input Circuit
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ASAHI KASEI
[AK4633]
„ Digital Block
Digital Block is composed as Figure 32.The recording and playback single paths are selected by ADCPF bit, PFDAC bit
and PFSDO bit (Figure 32~ Figure 35, Table 19)
PMADC bit
SDTI
ADC
1st Order
HPFAD bit
HPF
“1”
“0”
ADCPF bit
PMPFIL bit
HPF bit
1st Order
HPF
2 Band
EQ2-1 bits
EQ
ALC
(Volume)
“0”
“1”
“1”
PFSDO bit
“0”
PFDAC bit
PMDAC bit
DATT
SDTO
SMUTE
DAC
(1)
(2)
(3)
(4)
(5)
(6)
(7)
ADC : Include the Digital Filter(LPF) for ADC as shown in “FILTER CHRACTERISTICS”.
DAC : Include the Digital Filter(LPF) for DAC as shown in “FILTER CHRACTERISTICS”.
HPF : High Pass Filter. Enable to use for a Wind-Noise Reduction Filter. (See “Programmable Filter”)
EQ : using for an Equalizer or Notch Filter. (See “Programmable Filter”)
Volume : Digital Volume with ALC function. (See “Digital Volume” or “ALC”)
DATT : 4 steps Digital Volume for playback path.( See “Output Digital Volume2”)
SMUTE : Soft mute.
Figure 32. Digital block path
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ASAHI KASEI
[AK4633]
Mode
Recoding Main Mode
Playback Main Mode
Loop Back Mode
ADCPF bit
PFDAC bit
PFSDO bit
1
0
1
0
1
0
1
1
1
Table 19. Recode/Playback Mode
ADC
DAC
2nd Order
2 Band
HPF
EQ
SMUTE
Figure
Figure 33
Figure 34
Figure 35
ALC
(Volume)
DATT
Figure 33. The path at ADCPF bit = “1”, PFDAC bit = “0” and PFSDO bit = “1” (Default)
ADC
DAC
1st Order
HPF
SMUTE
DATT
ALC
(Volume)
2 Band
1st Order
EQ
HPF
Figure 34. The path at ADCPF bit = “0”, PFDAC bit = “1” and PFSDO bit = “0”
ADC
DAC
2nd Order
2 Band
HPF
EQ
SMUTE
ALC
(Volume)
DATT
Figure 35. The path at ADCPF bit = “1”, PFDAC bit = “1” and PFSDO bit = “1”
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ASAHI KASEI
[AK4633]
„ Digital Programmable Filter
The AK4633 have 2steps of 1st order HPF and 2 band Equalizer for recording and playback path (Figure 32).
(1) High Pass Filter (HPF)
Normally, this HPF is used for a Wind-Noise Reduction Filter. This is composed with 2 steps of 1st order HPF. The
coefficient of both HPF is same and should be set by F1A13-0 bits and F1B13-0 bits. The HPF of ADC could be ON/OFF
by HPFAD bit, and the HPF before 2 band EQ could be ON/Off by setting HPF bit. When the HPF is OFF, the audio data
passes this block by 0dB . The coefficient should be set when HPFAD bit = HPF bit = “0” or PMADC bit = PMPFIL bit
= “0”. After changing the coefficient, the HPF starts with 3/fs (max) delay time after (HPFAD bit and PMADC bit) or
(HPF bit and PMPFIL bit) are set to “1”. The waiting time is not necessity for setting HPFAD bit, HPF bit, PMADC bit
and PMPFIL bit to “1” after setting the coefficient.
fs: Sampling frequency
fc: Cut-off frequency
Register setting (Note 29)
HPF: F1A[13:0] bits =A, F1B[13:0] bits =B
(MSB=F1A13, F1B13; LSB=F1A0, F1B0)
1
1− tan (πfc/fs)
,
A=
B=
1 + tan (πfc/fs)
1 + tan (πfc/fs)
The cut-off frequency should be set as below.
fc/fs ≥ 0.0001 (fc min = 1.6Hz at 16kHz)
(2) 2 band Equalizer
This could be used as Equalizer or notch filter. 2 band Equalizer (EQ1 and EQ2) are ON/OFF independently by EQ1 bit
and EQ2 bit. When Equalizer is OFF, the audio data passes this block by 0dB. The coefficient of EQ1 should be set by
E1A15-0 bits, E1B15-0 bits and E1C15-0 bits, the coefficient of EQ2 should be set by E2A15-0 bits, E2B15-0 bits and
E2C15-0 bits. The EQ1 coefficient should be set when EQ1 bit = “0” or PMPFIL bit = “0”, the EQ2 coefficient should be
set when EQ2 bit = “0” or PMPFIL bit = “0”. After changing the coefficient, the Equalizer starts with 3/fs (max) delay
time after (EQ1 bit and PMPFIL bit) or (EQ2 bit and PMPFIL bit) are set to “1”. The waiting time is not necessity for
setting EQ1 bit, EQ2 bit and PMPFIL bit to “1” after setting the coefficient.
fs: Sampling frequency
fo: Center frequency
fb: Band width of 3dB gain difference from center frequency
K : Gain ( -1 ≤ K < 3 )
Register setting(Note 29)
EQ1: E1A[15:0] bits =A, E1B[15:0] bits =B, E1C[15:0] bits =C
EQ2: E2A[15:0] bits =A, E2B[15:0] bits =B, E2C[15:0] bits =C
(MSB=E1A15, E1B15, E1C15, E2A15, E2B15, E2C15 ; LSB= E1A0, E1B0, E1C0, E2A0, E2B0, E2C0)
2
tan (πfb/fs)
, B = cos(2π fo/fs) x
A= K x
1 + tan (πfb/fs)
1 + tan (πfb/fs)
,
C= −
1 − tan (πfb/fs)
1 + tan (πfb/fs)
The center frequency should be set as below.
fo/fs < 0.497
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ASAHI KASEI
[AK4633]
When the gain of K is set to “-1”, these Equalizers work as notch filter. If the difference between two center frequencies
of these notch filters is small, the center frequency will differ from the frequency that is calculated by the above equation.
Then, the difference between the actual two center frequencies is smaller that the difference between the two calculated
center frequencies. It is required to adjust the center frequencies when these are calculated. The frequency response can be
confirmed by the control soft that is attached in the demo board kit. If the two center frequencies are near, the actual center
frequencies should be confirmed by this software.
e.g.) Sampling frequency = 44.1kHz, the center frequencies of 2 band notch fitters are 6000Hz and 6500Hz, and the band
width is 200Hz.
When the coefficients that are calculated by fo = 6000Hz and 6500Hz is used, the actual center frequencies are 6017Hz
and 6476Hz. When the coefficients that are calculated by fo = 5984Hz and 6522Hz is used, the actual center frequencies
are 6000Hz and 6500Hz.
Note 29. [changing real number to binary number for the filter coefficient setting upon is as below]
X=( the real filter coefficient setting upon) x 213
Round off the X value to the decimal point and change it to binary number.
The MSB bit of each filter coefficient setting register is a sign bit.
„ Input Digital volume (Manual mode)
When ADCPF bit = “1” and ALC1 bit = “0”, ALC block becomes an input digital volume (manual mode). The digital
volume’s gain is set by IVOL7-0 bits as shown in Table 20. The IVOL7-0 bits value are reflected to this input volume at
zero cross or zero cross time out. The zero crossing timeout period is set by ZTM1-0 bits.
IVOL7-0bits
F1H
F0H
EFH
:
92H
91H
90H
:
2H
1H
0H
GAIN(0dB)
Step
+36.0
+35.625
+35.25
:
0.375dB
+0.375
0.0
-0.375
:
-53.625
-54.0
MUTE
Table 20. Input Digital Volume Setting
Default
When writing to the IVOL7-0 bits continually, the control register should be written by an interval more than zero
crossing timeout. If not, zero crossing counter could be reset at each time and volume is not be changed. However, it could
be ignored when writing a same register value as the last time. At this time, zero crossing counter has not been reset, so it
should be written by an interval less than zero crossing timeout.
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ASAHI KASEI
[AK4633]
„ Output Digital volume (Manual mode)
When ADCPF bit = “0” and ALC2 bit = “0”, ALC block become an output digital volume (manual mode). The digital
volume’s gain is set by OVOL7-0 bits as shown in Table 21. The OVOL7-0 bits value are reflected to this output volume
at zero cross or zero cross time out. The zero crossing timeout period is set by ZTM1-0 bits.
OVOL7-0bits
F1H
F0H
EFH
:
92H
91H
90H
:
2H
1H
0H
GAIN(0dB)
Step
+36.0
+35.625
+35.25
:
0.375dB
+0.375
0.0
-0.375
:
-53.625
-54.0
MUTE
Table 21. Output Digital Volume Setting
Default
When writing to the OVOL7-0 bits continually, the control register should be written by an interval more than zero
crossing timeout. If not, zero crossing counter could be reset at each time and volume is not be changed. However, It
could be ignored when writing a same register value as the last time. At this time, zero crossing counter has not been reset,
so it should be written by an interval less than zero crossing timeout.
„ Output Digital Volume2
AK4633 has 4 steps output volume in addition to the volume setting by OVOL7-0 bits. This volume is set by DATT1-0
bits as shown in Table 22.
DATT1-0bits
0H
1H
2H
3H
GAIN(0dB)
Step
0.0
Default
6.0dB
-6.0
-12.0
-18.1
Table 22. Output Digital Volume2 Setting
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ASAHI KASEI
[AK4633]
„ ALC Operation
ALC Operation works in ALC block. When ADCPF bit = “1”, ALC operation is enable for recording path. When
ADCPF bit = “0”, ALC operation is enable for playback path. The ON/OFF of ALC operation for recording is controlled
by ALC1 bit and the ON/OFF of ALC operation for playback is controlled by ALC2 bit.
1.
ALC Limiter Operation
When the ALC limiter is enabled, and output exceeds the ALC limiter detection level (Table 23), the volume value is
attenuated by the amount defined in LMAT1-0 bits(Table 24) automatically.
When the ZELMN bit = “0”(zero crossing detection valid), the VOL value is changed by ALC limiter operation at the
zero crossing point or zero crossing timeout. Zero crossing timeout period is set by ZTM1-0 bit that in common with ALC
recovery zero crossing timeout period’s setting (Table 25).
When the ZELMN bit = “1” (zero crossing detection invalid), VOL value has been changed immediately (period: 1/fs) by
ALC limiter operation. The attenuation for limiter operation is fixed to 1 step and not controlled by setting LMAT1-0 bits.
After finishing the attenuation operation, if ALC bit does not change to “0”, the operation repeats when the output signal
level exceeds the ALC limiter detection level.
LMTH1
0
0
1
1
LMTH0 ALC Limiter Detection Level ALC Recovery Waiting Counter Reset Level
0
ALC Output ≥ −2.5dBFS
−2.5dBFS > ALC Output ≥ −4.1dBFS
1
ALC Output ≥ −4.1dBFS
−4.1dBFS > ALC Output ≥ −6.0dBFS
0
ALC Output ≥ −6.0dBFS
−6.0dBFS > ALC Output ≥ −8.5dBFS
1
ALC Output ≥ −8.5dBFS
−8.5dBFS > ALC Output ≥ −12dBFS
Table 23. ALC Limiter Detection Level / Recovery Waiting Counter Reset Level
Default
ALC1 Limiter ATT Step
LMAT1
LMAT0
0
0
1
1
0
1
0
1
ZTM1
ZTM0
0
0
1
1
0
1
0
1
ALC1 Output ALC1 Output
≥ LMTH
≥ FS
ALC1 Output
≥ FS + 6dB
ALC1 Output
≥ FS + 12dB
1
1
1
2
2
2
2
4
4
1
2
4
Table 24. ALC Limiter ATT Step Setting
Zero Crossing Timeout Period
8kHz
16kHz
44.1kHz
128/fs
16ms
8ms
2.9ms
256/fs
32ms
16ms
5.8ms
512/fs
64ms
32ms
11.6ms
1024/fs
128ms
64ms
23.2ms
Table 25. ALC Zero Crossing Timeout Period Setting
MS0447-E-03
1
2
8
8
Default
Default
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ASAHI KASEI
2.
[AK4633]
ALC Recovery Operation
The ALC recovery operation waits for the WTM1-0 bits(Table 26) to be set after completing the ALC limiter operation.
If the input signal does not exceed “ALC recovery waiting counter reset level” (Table 23) during the wait time, the ALC
recovery operation is done. The VOL value is automatically incremented by RGAIN1-0 bits (Table 27) up to the set
reference level(Table 28, Table 29) with zero crossing detection which timeout period is set by ZTM1-0 bits (Table 25).
The ALC recovery operation is done at a period set by WTM1-0 bits.
For example, when the current VOL value is 30H and RGAIN1-0 bits are set to “01”(2 steps), VOL is changed to 32H by
the auto limiter operation and then the input signal level is gained by 0.75dB (=0.375dB x 2). When the VOL value
exceeds the reference level (IREF7-0 or OREF5-0), the VOL values are not increased.
When
“ALC recovery waiting counter reset level (LMTH1-0) ≤ Output Signal < ALC limiter detection level (LMTH1-0)”
during the ALC recovery operation, the waiting timer of ALC recovery operation is reset. When
“ALC recovery waiting counter reset level (LMTH1-0) > Output Signal”,
the waiting timer of ALC recovery operation starts.
The ALC operation corresponds to the impulse noise. When the impulse noise is input, the ALC recovery operation
becomes faster than a normal recovery operation. When large noise is input to microphone instantaneously, the quality of
small level in the large noise can be improved by this fast recovery operation. The speed of first recovery operation is set
by RFST1-0 bits(Table 30).
WTM1
WTM0
0
0
1
1
0
1
0
1
ALC Recovery Operation Waiting Period
8kHz
16kHz
44.1kHz
128/fs
16ms
8ms
2.9ms
256/fs
32ms
16ms
5.8ms
512/fs
64ms
32ms
11.6ms
1024/fs
128ms
64ms
23.2ms
Table 26. ALC Recovery Operation Waiting Period
RGAIN1
0
0
1
1
RGAIN0
GAIN STEP
0
1
0.375dB
1
2
0.750dB
0
3
1.125dB
1
4
1.500dB
Table 27. ALC Recovery GAIN Step
MS0447-E-03
Default
Default
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ASAHI KASEI
[AK4633]
IREF7-0bits
GAIN(0dB)
Step
F1H
+36.0
F0H
+35.625
EFH
+35.25
:
:
C5H
+19.5
Default
0.375dB
:
:
92H
+0.375
91H
0.0
90H
-0.375
:
:
2H
-53.625
1H
-54.0
0H
MUTE
Table 28. Reference Level at ALC Recovery operation for recoding
OREF5-0bits
GAIN(0dB)
Step
3CH
+36.0
3BH
+34.5
3AH
+33.0
:
:
28H
+6.0
Default
1.5dB
:
:
25H
+1.5
24H
0.0
23H
-1.5
:
:
2H
-51.0
1H
-52.5
0H
-54.0
Table 29. Reference Level at ALC Recovery operation for playback
RFST1 bit
0
0
1
1
RFST0 bit
Recovery Speed
0
4 times
1
8 times
0
16times
1
N/A
Table 30. First Recovery Speed Setting
MS0447-E-03
Default
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ASAHI KASEI
3.
[AK4633]
The Volume at the ALC Operation
The current volume value at the ALC operation is reflected by VOL7-0 bits. It is enable to check the current volume value
with reading the register value of VOL7-0 bits.
VOL7-0bits
GAIN(0dB)
0EH
+36.0
0FH
+35.625
10H
+35.25
:
:
3AH
+19.5
:
:
6DH
+0.375
6EH
0.0
6FH
-0.375
:
:
FDH
-53.625
FEH
-54.0
FFH
MUTE
Table 31. Value of VOL7-0 bits
4.
Example of the ALC Operation for Recording Operation
Table 32 shows the examples of the ALC setting for mic recording.
fs=8kHz
Operation
−4.1dBFS
Enable
16ms
Register Name
Comment
LMTH
ZELM
ZTM1-0
Limiter detection Level
Limiter zero crossing detection
Zero crossing timeout period
Recovery waiting period
*WTM1-0 bits should be the same data
00
16ms
as ZTM1-0 bits
Maximum gain at recovery operation
C5H
19.5dB
Gain of IVOL
C5H
19.5dB
Limiter ATT step
11
1/2/4/8 step
Recovery GAIN step
00
1 step
ALC enable
1
Enable
Speed of Fast Recovery
00
4 times
Table 32. Example of the ALC Setting (Recording)
WTM1-0
IREF7-0
IVOL7-0
LMAT1-0
RGAIN1-0
ALC
FRSL1-0
Data
01
0
00
MS0447-E-03
Data
01
0
01
fs=16kHz
Operation
−4.1dBFS
Enable
16ms
01
16ms
C5H
C5H
11
00
1
10
19.5dB
19.5dB
1/2/4/8 step
1 step
Enable
4times
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ASAHI KASEI
5.
[AK4633]
Example of the ALC Operation for Playback Operation
Table 33 shows the examples of the ALC setting for playback operation.
fs=8kHz
Operation
−4.1dBFS
Enable
16ms
Register Name
Comment
LMTH
ZELM
ZTM1-0
Limiter detection Level
Limiter zero crossing detection
Zero crossing timeout period
Recovery waiting period
*WTM1-0 bits should be the same data
00
16ms
as ZTM1-0 bits
Maximum gain at recovery operation
28
+6dB
Gain of IVOL
91
0dB
Limiter ATT step
11
1/2/4/8 step
Recovery GAIN step
00
1 step
ALC enable
1
Enable
Speed of Fast Recovery
00
4 times
Table 33. Example of the ALC Setting (Playback)
WTM1-0
OREF5-0
OVOL7-0
LMAT1-0
RGAIN1-0
ALC
FRSL1-0
Data
01
0
00
MS0447-E-03
Data
01
0
01
fs=16kHz
Operation
−4.1dBFS
Enable
16ms
01
16ms
28
91
11
00
1
00
+6dB
0dB
1/2/4/8 step
1 step
Enable
4 times
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ASAHI KASEI
[AK4633]
The following registers should not be changed during the ALC operation. These bits should be changed after the ALC
operation is finished by ALC1 = ALC2 bits =“0” or PMPFIL bit = “0”.
• LMTH, LMAT1-0, WTM1-0, ZTM1-0, RGAIN1-0, IREF7-0/OREF7-0, ZELM, RFST1-0
Example:
Limiter = Zero crossing Enable
Manual Mode
Recovery Cycle = [email protected]
Limiter and Recovery Step = 1
WR (ZTM1-0, WTM1-0)
Maximum Gain = +19.5dB
Limiter Detection Level = −4.1dBFS
ALC1 bit = “1”
WR (IREF7-0/OREF5-0)
WR (IVOL7-0/OVOL7-0)
*1
(1) Addr=06H, Data=00H
WR (RGAIN1, LMTH1,RFST1-0)
(2) Addr=08H, Data=C5H
WR (LMAT1-0, RGAIN0, ZELMN, LMTH0)
WR (ALC1= “1”)
(3) Addr=09H, Data=C5H
*2
ALC Operation
(4) Addr=0BH, Data=28H
(5) Addr=07H, Data=21H
Note : WR : Write
*1: The value of volume at starting should be the same or smaller than REF’s.
*2: When setting ALC1 bit or ALC2 bit to “0”, the operation is shifted to manual mode after passing the zero crossing
time set by ZTM1-0 bits.
Figure 36. Registers set-up sequence at ALC operation
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ASAHI KASEI
[AK4633]
„ SOFTMUTE
Soft mute operation is performed in the digital input domain. When the SMUTE bit goes to “1”, the input signal is
attenuated by −∞ (“0”) during the cycle of 245/fs ([email protected]=8kHz). When the SMUTE bit is returned to “0”, the mute
is cancelled and the input attenuation gradually changes to 0dB during the cycle of 245/fs ([email protected]=8kHz). If the soft
mute is cancelled within the cycle of 245/fs ([email protected]=8kHz), the attenuation is discontinued and returned to 0dB. The
soft mute for Playback operation is effective for changing the signal source without stopping the signal transmission.
SM U T E bit
245/fs
245/fs
(1)
0dB
(3)
Attenuation
-∞
GD
GD
(2)
Analog O utput
Figure 37. Soft Mute Function
(1) The input signal is attenuated by −∞ (“0”) during the cycle of 245/fs ([email protected]=8kHz).
(2) Analog output corresponding to digital input has the group delay (GD).
(3) If the soft mute is cancelled within the cycle of 245/fs ([email protected]=8kHz), the attenuation is discounted and returned
to 0dB within the same cycle.
„ BEEP Input
When the PMBP bit is set to “1”, the beep input is powered-up. When the BEEPS bit is set to “1”, the input signal from the
BEEP pin is output to Speaker-Amp. When the BEEPA bit is set to “1”, the input signal from the BEEP pin is output to the
mono line output amplifier. The external resister Ri adjusts the signal level of BEEP input. Table 34 shows the typical
gain example at Ri = 20kΩ. This gain is in inverse proportion to Ri It should be set MDIF bit to “1” expect PMBP bit =
BEEPA bit = BEEPS bit = “0”.
Rf
Ri
-
BEEP
+
Figure 38. Block Diagram of BEEP pin
SPKG1-0 bits
00
01
10
11
BEEP Æ SPP/SPN Gain
BEEP Æ AOUT Gain
+8dB
0dB
+10dB
0dB
+12dB
0dB
+14dB
0dB
Table 34. BEEP Input Gain at Ri = 20kΩ
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ASAHI KASEI
[AK4633]
„ Mono Line Output (AOUT pin)
A signal of DAC is output from AOUT pin. When the DACA bit is “0”, this output is OFF. The load resistance is
10kΩ(min). When PMAO bit is “0” and AOPS bit is “0”, the mono line output enters power-down and is pulled down by
100Ω(typ). When ADPS bit is “1”, the mono line output enters power-save mode. If PMAO bit is controlled at AOPS bit
= “1”, POP noise will be reduced at power-up and down. Then, this line should be pulled down by 20kΩ of resister after
C-coupling shown in Figure 39. This rising and falling time is max 300 ms at C=1.0µF . When PMAO bit is “1” and
AOPS bit is “0”, the mono line output enters power-up state.
1µF
AOUT
220Ω
20kΩ
Figure 39. AOUT external circuit in case of using POP Reduction function
AOUT Control Sequence in case of using POP Reduction Circuit
(2 )
(5 )
P M A O b it
(1 )
(3 )
(4 )
(6 )
A O P S b it
A O U T p in
N o r m a l O u tp u t
≥ 300 m s
≥ 300 m s
(1) Set AOPS bit = “1”. Mono line output enters the power-save mode.
(2) Set PMAO bit = “1”. Mono line output exits the power-down mode.
AOUT pin rises up to VCOM voltage. Rise time is 200ms (max 300ms) at C=1µF.
(3) Set AOPS bit = “0” after AOUT pin rises up. Mono line output exits the power-save mode.
Mono line output is enabled.
(4) Set AOPS bit = “1”. Mono line output enters power-save mode.
(5) Set PMAO bit = “1”. Mono line output enters power-down mode.
AOUT pin falls down to AVSS. Fall time is 200ms (max 300ms) at C=1µF.
(6) Set AOPS bit = “0” after AOUT pin falls down. Mono line output exits the power-save mode.
Figure 40. Mono Line Output Control Sequence in case of using POP Reduction function
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[AK4633]
„ Speaker Output
The power supply voltage for Speaker-Amp SVDD can be set to from 2.2V to 4.0V. However, SVDD should be set to
from 2.6V to 3.6V, when 8Ω dynamic speaker is connected. If SVDD is more than 3.6V when 8Ω dynamic speaker is
connected to the AK4633, the output of Speaker-Amp should be restricted in consideration of maximum power
dissipation.
The output signal from DAC is input to the Speaker-amp. This Speaker-amp is a mono output controlled by BTL and the
gain of Speaker-Amp is set by SPKG1-0 bits. The output voltage depends on AVDD and SPKG1-0 bits.
SPK-AMP Output Level[Vpp]
Gain
DAC =-4.1dBFS (Note 30)
(Note 31)
00
3.17
0dB
01
4.00
+2dB
10
5.03
+4dB
11
6.33
+6dB
Note 30. AVDD=3.3V. The output level is proportional to AVDD.
Note 31. The Gain with a reference of SPKG1-0 bits = “00”.
Note 32. The setting of SPKG1-0 bits = “01” is recommend when 8Ω dynamic speaker is connected.
The SPK-Amp Power is 250mW at 8Ω Load Resistance and 4.0Vpp output level.
SPKG1-0 bits
Table 35. SPK-Amp Output Voltage and Gain
<Caution for using Piezo Speaker>
When a piezo speaker is used, resistances more than 10Ω should be inserted between SPP/SPN pins and speaker in series,
respectively, as shown in Figure 41. Zener diodes should be inserted between speaker and GND as shown in Figure 41, in
order to protect SPK-Amp of AK4633 from the power that the piezo speaker outputs when the speaker is pressured. Zener
diodes of the following Zener voltage should be used.
92% of SVDD ≤ Zener voltage of Zener diodo(ZD of Figure 41) ≤ SVDD+0.3V
Ex) In case of SVDD = 3.8V : 3.5V ≤ ZD ≤ 4.1V
For example, Zener diode which Zener voltage is 3.9V(Min 3.7V, Max 4.1V) can be used.
ZD
SPK-Amp
SPP
≥10Ω
SPN
≥10Ω
ZD
Figure 41. Circuit of Speaker Output (using a piezo speaker)
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ASAHI KASEI
[AK4633]
<Control Sequence of Speaker Amp>
Speaker-Amp can be powered-up/down by controlling the PMSPK bit. When the PMSPK bit is “0”, the SPP and SPN
pins are placed in a Hi-Z state.
When the PMSPK bit is “1” and SPPSN bit is “0”, the Speaker-amp enters power-save-mode. In this mode, the SPP pin is
placed in a Hi-Z state and the SPN pin goes to SVDD/2 voltage.
When the PMSPK bit is “1” and PDN pin is controlled from “L” to “H”, the SPP and SPN pins rise up from
power-save-mode. In this mode, the SPP pin is placed in a Hi-Z state and the SPN pin goes to SVDD/2 voltage. Because
the SPP and SPN pins rise up at power-save-mode, this mode can reduce pop noise. When the AK4633 is powered-down,
pop noise can be also reduced by first entering power-save-mode.
PMSPK bit
SPPSNbit
SPP pin
SPN pin
Hi-Z
Hi-Z
Hi-Z
SVDD/2
SVDD/2
>t1(Note)
Hi-Z
>0
(Note)
SPPSN bit should be set to “1” at more than 1ms after PMSPK bit is set to “1”. But, when BEEP Input Amp and Speaker
Amp are powered-up at the same time, SPPSN bit should be set to “1” after BEEP Input become stable. When the
resistance and capacitance of BEEP pin are R=20kΩ, C=0.1µF, 10ms(=5τ) is required for BEEP Input to become stable.
Figure 42. Power-up/Power-down Timing for Speaker-Amp
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ASAHI KASEI
[AK4633]
„ Serial Control Interface
Internal registers may be written and read by using the 3-wire µP interface pins (CSN, CCLK and CDTI). The data on this
interface consists of a 2-bit Chip address (2bits, fixed to “10”), Read/Write, Register address (MSB first, 5bits) and
Control data (MSB first, 8bits). Address and data is clocked in on the rising edge of CCLK and data is clocked out on the
falling edge. It is available for writing the data on the rising edge of CSN. When reading operation, CDTI pin has become
an output mode at the falling edge of 8th CCLK and outputs D7-D0. The output finishes on the rising edge of CSN. The
CDTI pin is placed in a Hi-Z state except outputting data at read operation mode. The clock speed of CCLK is 5MHz
(max). The value of internal registers is initialized at PDN pin = “L”.
Note 33. It is available for reading the address 00H~0BH and 0DH~0FH. When reading the address 0CH and 10H ∼ 1FH,
the register values are invalid.
CSN
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
CCLK
CDTI
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
“1” “0”
C1-C0:
R/W:
A4-A0:
D7-D0:
Chip Address (C1 = “1”, C0 = “0”); Fixed to “10”
READ/WRITE (“1”: WRITE, “0”: READ)
Register Address
Control data
Figure 43. Serial Control I/F Timing
MS0447-E-03
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ASAHI KASEI
[AK4633]
„ Register Map
Addr
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
0CH
0DH
0EH
0FH
10H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1BH
1CH
1DH
1EH
1FH
Register Name
Power Management 1
Power Management 2
Signal Select 1
Signal Select 2
Mode Control 1
Mode Control 2
Timer Select
ALC Mode Control 1
ALC Mode Control 2
Digital Volume Control
Digital Volume Control
ALC Mode Control 3
Reserved
ALC LEVEL
Signal Select 3
Reserved
E1 Co-efficient 0
E1 Co-efficient 1
E1 Co-efficient 2
E1 Co-efficient 3
E1 Co-efficient 4
E1 Co-efficient 5
E2 Co-efficient 0
E2 Co-efficient 1
E2 Co-efficient 2
E2 Co-efficient 3
E2 Co-efficient 4
E2 Co-efficient 5
HPF Co-efficient 0
HPF Co-efficient 1
HPF Co-efficient 2
HPF Co-efficient 3
D7
PMPFIL
0
SPPSN
PFSDO
PLL3
ADRST
0
0
IREF7
IVOL7
OVOL7
RGAIN1
0
VOL7
DATT1
0
E1A7
E1A15
E1B7
E1B15
E1C7
E1C15
E2A7
E2A15
E2B7
E2B15
E2C7
E2C15
F1A7
0
F1B7
0
D6
PMVCM
0
BEEPS
AOPS
PLL2
FCKO
0
ALC2
IREF6
IVOL6
OVOL6
LMTH1
0
VOL6
DATT0
0
E1A6
E1A14
E1B6
E1B14
E1C6
E1C14
E2A6
E2A14
E2B6
E2B14
E2C6
E2C14
F1A6
0
F1B6
0
D5
PMBP
0
DACS
MGAIN1
PLL1
FS3
ZTM1
ALC1
IREF5
IVOL5
OVOL5
OREF5
0
VOL5
SMUTE
0
E1A5
E1A13
E1B5
E1B13
E1C5
E1C13
E2A5
E2A13
E2B5
E2B13
E2C5
E2C13
F1A5
F1A13
F1B5
F1B13
D4
PMSPK
0
DACA
SPKG1
PLL0
MSBS
ZTM0
ZELMN
IREF4
IVOL4
OVOL4
OREF4
0
VOL4
MDIF
0
E1A4
E1A12
E1B4
E1B12
E1C4
E1C12
E2A4
E2A12
E2B4
E2B12
E2C4
E2C12
F1A4
F1A12
F1B4
F1B12
D3
PMAO
M/S
0
SPKG0
BCKO1
BCKP
WTM1
LMAT1
IREF3
IVOL3
OVOL3
OREF3
0
VOL3
EQ2
0
E1A3
E1A11
E1B3
E1B11
E1C3
E1C11
E2A3
E2A11
E2B3
E2B11
E2C3
E2C11
F1A3
F1A11
F1B3
F1B11
D2
PMDAC
0
PMMP
BEEPA
BCKO0
FS2
WTM0
LMAT0
IREF2
IVOL2
OVOL2
OREF2
0
VOL2
EQ1
0
E1A2
E1A10
E1B2
E1B10
E1C2
E1C10
E2A2
E2A10
E2B2
E2B10
E2C2
E2C10
F1A2
F1A10
F1B2
F1B10
D1
0
MCKO
MGAIN2
PFDAC
DIF1
FS1
RFST1
RGAIN0
IREF1
IVOL1
OVOL1
OREF1
0
VOL1
HPF
0
E1A1
E1A9
E1B1
E1B9
E1C1
E1C9
E2A1
E2A9
E2B1
E2B9
E2C1
E2C9
F1A1
F1A9
F1B1
F1B9
D0
PMADC
PMPLL
MGAIN0
ADCPF
DIF0
FS0
RFST0
LMTH0
IREF0
IVOL0
OVOL0
OREF0
0
VOL0
HPFAD
0
E1A0
E1A8
E1B0
E1B8
E1C0
E1C8
E2A0
E2A8
E2B0
E2B8
E2C0
E2C8
F1A0
F1A8
F1B0
F1B8
PDN pin = “L” resets the registers to their default values.
Note 34. Unused bits must contain a “0” value.
Note 35. When reading address 0CH and 10H to 1FH, the values are invalid.
Note 36. Address 0DH is a read only register. Writing access to 0DH does not effect the operation.
MS0447-E-03
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ASAHI KASEI
[AK4633]
„ Register Definitions
Addr
00H
Register Name
Power Management 1
Default
D7
PMPFIL
0
D6
PMVCM
0
D5
PMBP
0
D4
PMSPK
0
D3
PMAO
0
D2
PMDAC
0
D1
0
0
D0
PMADC
0
PMADC: ADC Block Power Control
0: Power down (Default)
1: Power up
When the PMADC bit changes from “0” to “1”, the initialization cycle ([email protected] when ADRST
bit = “0”) starts. After initializing, digital data of the ADC is output.
PMDAC: DAC Block Power Control
0: Power down (Default)
1: Power up
PMAO: Mono Line Out Power Control
0: Power down (Default)
1: Power up
PMSPK: Speaker Block Power Control
0: Power down (Default)
1: Power up
PMBP: BEEP In Power Control
0: Power down (Default)
1: Power up
Even if PMBP bit is “0”, the path is still connected between BEEP and AOUT/SPK-Amp. BEEPS and BEEPA
bits should be set to “0” to disconnect these paths.
PMVCM: VCOM Block Power Control
0: Power down (Default)
1: Power up
PMPFIL: Programmable Filter Block(HPF/2 Band EQ/ALC) Control
0: Power down (Default)
1: Power up
Each block can be powered-down respectively by writing “0” in each bit. When the PDN pin is “L”, all blocks are
powered-down.
When PMPLL and MCKO bits and all bits in 00H address are “0”, all blocks are powered-down. The registers remain
unchanged.
When any of the blocks are powered-up, the PMVCM bit must be set to “1”. When PMPLL and MCKO bits and all
bits in 00H address are “0”, PMVCM bit can write to “0”.
When BEEP signal is output from Speaker-Amp (Signal path: BEEP pin Æ SPP/SPN pins) or Mono Lineout-Amp
(Signal path: BEEP pin Æ AOUT pin) only, the clocks may not be present. When ADC, DAC, ALC1 or ALC2 is in
operation, the clocks must always be present.
MS0447-E-03
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ASAHI KASEI
Addr
01H
Register Name
Power Management 2
Default
[AK4633]
D7
0
0
D6
0
0
D5
0
0
D4
0
0
D3
M/S
0
D2
0
0
D1
MCKO
0
D0
PMPLL
0
D4
DACA
0
D3
0
0
D2
PMMP
0
D1
D0
MGAIN2
MGAIN0
0
1
PMPLL: PLL Block Power Control Select
0: PLL is Power down and External is selected. (Default)
1: PLL is Power up and PLL Mode is selected.
MCKO: Master Clock Output Enable
0: “L” Output (Default)
1: 256fs Output
M/S: Master/Slave Mode Select
0: Slave Mode(Default)
1: Master Mode
Addr
02H
Register Name
Signal Select 1
Default
D7
SPPSN
0
D6
BEEPS
0
D5
DACS
0
MGAIN2, MGAIN0: MIC-Amp Gain Control (Table 18)
MGAIN1 bit is D5 bit of 03H. Default: “001H” (+20.0dB)
PMMP: Power Supply Control for Microphone
0: OFF (Default)
1: ON
When PMADC bit is “1”, PMMP bit is enabled.
DACA: Switch Control from DAC to Mono Line Output
0: OFF (Default)
1: ON
When PMAO bit is “1”, DACA bit is enabled. When PMAO bit is “0”, the AOUT pin go to AVSS.
DACS: Switch Control from DAC to Speaker-Amp
0: OFF (Default)
1: ON
When DACS bit is “1”, DAC output signal is input to Speaker-Amp.
BEEPS: Switch Control from BEEP pin to Speaker-Amp
0: OFF (Default)
1: ON
When BEEPS bit is “1”, BEEP signal is input to Speaker-Amp.
SPPSN: Speaker-Amp Power-Save Mode
0: Power-Save Mode (Default)
1: Normal Operation
When SPPSN bit is “0”, Speaker-Amp is in power-save mode. In this mode, SPP pin goes to Hi-Z and SPN pin
is outputs SVDD/2 voltage. When PMSPK bit = “1”, SPPSN bit is enabled. After the PDN pin is set to “H”,
Speaker-Amp is in power-down mode since PMSPK bit is “0”.
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ASAHI KASEI
Addr
03H
Register Name
Signal Select 2
Default
[AK4633]
D7
PFSDO
1
D6
AOPS
0
D5
MGAIN1
0
D4
SPKG1
0
D3
SPKG0
0
D2
BEEPA
0
D1
PFDAC
0
D0
ADCPF
1
ADCPF : Select the input signal to Programmable Filter/ALC
0: SDTI
1: Output from ADC (Default)
PFDAC : Select the input signal to DAC
0: SDTI (Default)
1: Output from programmable Filter/ALC
BEEPA: Switch Control from beep signal to mono line output amp
0: OFF (Default)
1: ON
When PMAO bit is “1”, BEEPA bit is enabled. When PMAO bit is “0”, the AOUT pin go to AVSS.
SPKG1-0: Select Speaker-Amp Output Gain ( Table 35)
Default: “00”
DACS
DAC
SPK
BEEPS
BEEP
DACA
BEEPA
AOUT
Figure 44. Speaker and Mono Lineout-Amps switch control
MGAIN1: MIC-Amp Gain Control (Table 18)
MGAIN2, MGAIN0 bit is D1,D2 bit of 02H. Default: “001H” (+20.0dB)
AOPS: Mono Line Output Power-Save Mode
0: Normal Operation (Default)
1: Power Save Mode
Power-save mode is enable at AOPS bit = “1”. POP noise at power-up/down can be reduced by changing at
AOPS bit = “1” (Figure 40).
PFSDO : Select the output signal from SDTO
0: Output from ADC (+ 1st HPF)
1: Output from Programmable Filter/ALC(Default)
MS0447-E-03
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ASAHI KASEI
Addr
04H
Register Name
Mode Control 1
Default
[AK4633]
D7
PLL3
0
D6
PLL2
0
D5
PLL1
0
D4
PLL0
0
D3
BCKO1
0
D2
BCKO0
0
D1
DIF1
1
D0
DIF0
0
D3
BCKP
0
D2
FS2
0
D1
FS1
0
D0
FS0
0
DIF1-0: Audio Interface Format (Table 15)
Default: “10” (MSB justified)
BCKO1-0: Select BICK output frequency at Master Mode (Table 9)
Default: “00” (16fs)
PLL3-0: Select input frequency at PLL mode (See Table 4)
Default: “0000” (FCK pin)
Addr
05H
Register Name
Mode Control 2
Default
D7
ADRST
0
D6
FCKO
0
D5
FS3
0
D4
MSBS
0
FS3-0: Setting of Sampling Frequency (Table 5 and Table 6) and MCKI Frequency (See Table 11)
These bits are selected to sampling frequency at PLL mode and MCKI frequency at EXT mode.
Default: “0000”
BCKP, MSBS: “00” (Default) (Table 16)
FCKO: Select FCK output frequency at Master Mode (Table 10)
“0” (Default)
ADRST: Select ADC initialization cycle
0: 1059/fs (Default)
1: 291/fs
Addr
06H
Register Name
Timer Select
Default
D7
0
0
D6
0
0
D5
ZTM1
0
D4
ZTM0
0
D3
WTM1
0
D2
WTM0
0
D1
RFST1
0
D0
RFST0
0
WTM1-0: ALC1 Recovery Waiting Period (Table 26)
A period of recovery operation when any limiter operation does not occur during the ALC1 operation.
Default is “00”.
ZTM1-0: ALC1 Zero crossing timeout Period (Table 25)
When the IPGA perform zero crossing or timeout, the IPGA value is changed by the µP WRITE operation,
ALC1 recovery operation. Default is “00”.
FRSL1-0: ALC First recovery Speed(Table 30)
Default: “00”(4times)
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ASAHI KASEI
Addr
07H
Register Name
ALC Mode Control 1
Default
[AK4633]
D7
0
0
D6
ALC2
0
D5
ALC1
0
D4
ZELMN
0
D3
LMAT1
0
D2
LMAT0
0
D1
0
D0
LMTH0
1
D1
IREF1
0
D0
IREF0
1
RGAIN0
LMTH1-0: ALC Limiter Detection Level / Recovery Waiting Counter Reset Level (Table 23)
LMTH1 bit is D6 bit of 0BH. Default: “01”.
RGAIN1-0: ALC Recovery Gain Step(Table 27)
RGAIN1 bit is D7 bit of 0BH. Default: “00”
LMAT1-0: ALC Limiter ATT Step(Table 24)
Default: “00”
ZELMN: Enable zero crossing detection at ALC Limiter operation
0: Enable (Default)
1: Disable
ALC1: ALC Enable for Recording
0: Recording ALC Disable (Default)
1: Recording ALC Enable
ALC2: ALC Enable for Playback
0: Playback ALC Disable (Default)
1: Playback ALC Enable
Addr
08H
Register Name
ALC Mode Control 2
Default
D7
IREF7
1
D6
IREF6
1
D5
IREF5
0
D4
IREF4
0
D3
IREF3
0
D2
IREF2
1
IREF7-0: Reference value at Recording ALC Recovery Operation. 0.375dB step, 242 Level (Table 28)
Default: “C5H” (+19.5dB)
Addr
09H
Register Name
Input Digital Volume Control
Default
D7
IVOL7
1
D6
IVOL6
0
D5
IVOL5
0
D4
IVOL4
1
D3
IVOL3
0
D2
IVOL2
0
D1
IVOL1
0
D0
IVOL0
1
D3
OVOL3
0
D2
OVOL2
0
D1
OVOL1
0
D0
OVOL0
1
IVOL7-0: Input Digital Volume; 0.375dB step, 242 Level (Table 20)
Default: “91H” (0.0dB)
Addr
0AH
Register Name
Digital Volume Control
Default
D7
OVOL7
1
D6
OVOL6
0
D5
OVOL5
0
D4
OVOL4
1
OVOL7-0: Output Digital Volume; 0.375dB step, 242 Level (Table 21)
Default: “91H” (0.0dB)
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ASAHI KASEI
Addr
0BH
Register Name
ALC Mode Control 3
Default
[AK4633]
D7
RGAIN1
0
D6
LMTH1
0
D5
OREF5
1
D4
OREF4
0
D3
OREF3
1
D2
OREF2
0
D1
OREF1
0
D0
OREF0
0
OREF5-0: Reference value at Playback ALC Recovery Operation. 0.375dB step, 50 Level (Table 29)
Default: “28H” (+6.0dB)
RGAIN1-0: ALC Recovery Gain Step(Table 27)
RGAIN1 bit is D1 bit of 07H. Default: “00”
Addr
0DH
Register Name
Input Digital Volume Control
Default
D7
VOL7
-
D6
VOL6
-
D5
VOL5
-
D4
VOL4
-
D3
VOL3
-
D2
VOL2
-
D1
VOL1
-
D0
VOL0
-
D1
HPF
1
D0
HPFAD
1
VOL7-0: Current ALC volume value; 0.375dB step, 242 Level. Read operation only(Table31)
Addr
0EH
Register Name
Mode Control 3
Default
D7
DATT1
0
D6
DATT0
0
D5
SMUTE
0
D4
MDIF
0
D3
EQ2
0
D2
EQ1
0
HPFAD: HPF after ADC Enable
0: Disable
1: Enable(Default)
When HPFAD bit = “0”, HPFAD block is through (0dB).
HPF: HPF Enable in Filter block that PMPFIL bit is controlled.
0: Disable
1: Enable(Default)
When HPF bit = “0”, HPF block is through (0dB).
EQ1: Equalizer1(EQ1) Enable
0: Disable (Default)
1: Enable
When EQ1 bit is “1”, the settings of EQA15-0, EQB15-0 and EQC15-0 bits are enabled. When EQ1 bit is “0”,
EQ1 block is through (0dB).
EQ2: Equalizer2(EQ2) Enable
0: Disable (Default)
1: Enable
When EQ2 bit is “1”, the settings of EQA15-0, EQB15-0 and EQC15-0 bits are enabled. When EQ2 bit is “0”,
EQ2 block is through (0dB).
SMUTE: soft mute control
0: Normal Operation (Default)
1: DAC outputs soft-muted
MDIF: MIC Input Type Select
0: Single-ended input (MIC pin Input: Default)
1: Full-differential input (MIC pin and BEEP/MICP pin Input)
When MDIF bit = “1”, it must be set PMBP bit = BEEPA bit = BEEPS bit = “0”.
DATT1-0: Output Digital Volume2; 6dB step, 4 Level (Table 22)
Default: “00H” (0.0dB)
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ASAHI KASEI
Addr
10H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1BH
Register Name
E1 Co-efficient 0
E1 Co-efficient 1
E1 Co-efficient 2
E1 Co-efficient 3
E1 Co-efficient 4
E1 Co-efficient 5
E2 Co-efficient 0
E2 Co-efficient 1
E2 Co-efficient 2
E2 Co-efficient 3
E2 Co-efficient 4
E2 Co-efficient 5
Default
[AK4633]
D7
E1A7
E1A15
E1B7
E1B15
E1C7
E1C15
E2A7
E2A15
E2B7
E2B15
E2C7
E2C15
0
D6
E1A6
E1A14
E1B6
E1B14
E1C6
E1C14
E2A6
E2A14
E2B6
E2B14
E2C6
E2C14
0
D5
E1A5
E1A13
E1B5
E1B13
E1C5
E1C13
E2A5
E2A13
E2B5
E2B13
E2C5
E2C13
0
D4
E1A4
E1A12
E1B4
E1B12
E1C4
E1C12
E2A4
E2A12
E2B4
E2B12
E2C4
E2C12
0
D3
E1A3
E1A11
E1B3
E1B11
E1C3
E1C11
E2A3
E2A11
E2B3
E2B11
E2C3
E2C11
0
D2
E1A2
E1A10
E1B2
E1B10
E1C2
E1C10
E2A2
E2A10
E2B2
E2B10
E2C2
E2C10
0
D1
E1A1
E1A9
E1B1
E1B9
E1C1
E1C9
E2A1
E2A9
E2B1
E2B9
E2C1
E2C9
0
D0
E1A0
E1A8
E1B0
E1B8
E1C0
E1C8
E2A0
E2A8
E2B0
E2B8
E2C0
E2C8
0
E1A15-0, E1B15-0, E1C15-0: Coefficient for Equalizer 1(16bit x3)
Default: “0000H”
E2A15-0, E2B15-0, E2C15-0: Coefficient for Equalizer 2 (16bit x3)
Default: “0000H”
Addr
1CH
Register Name
HPF Co-efficient 0
Default
D7
F1A7
0
D6
F1A6
0
D5
F1A5
0
D4
F1A4
1
D3
F1A3
0
D2
F1A2
1
D1
F1A1
1
D0
F1A0
0
Addr
1DH
Register Name
HPF Co-efficient 1
Default
D7
0
0
D6
0
0
D5
F1A13
0
D4
F1A12
1
D3
F1A11
1
D2
F1A10
1
D1
F1A9
1
D0
F1A8
1
Addr
1EH
Register Name
HPF Co-efficient 2
Default
D7
F1B7
0
D6
F1B6
0
D5
F1B5
1
D4
F1B4
0
D3
F1B3
1
D2
F1B2
0
D1
F1B1
1
D0
F1B0
1
Addr
1FH
Register Name
HPF Co-efficient 3
Default
D7
0
0
D6
0
0
D5
F1B13
0
D4
F1B12
1
D3
F1B11
1
D2
F1B10
1
D1
F1B9
1
D0
F1B8
0
F1A13-0, F1B13-0: FIL1 (Wind-noise Reduction Filter) Coefficient Setting Enable (14bit x 2)
Default: F1A13-0 bits = 0x1F16, F1B13-0 bits = 0x1E2B
fc = [email protected]=8kHz, [email protected]=16kHz
MS0447-E-03
2006/04
- 62 -
ASAHI KASEI
[AK4633]
SYSTEM DESIGN
Figure 45 shows the system connection diagram for the AK4633. An evaluation board [AKD4633] is available which
demonstrates the optimum layout, power supply arrangements and measurement results.
Single Ended input
20k
Analog Supply
AOUT 21
BEEP 22
1 VCOM
SPN 18
2 AVSS
SPP 17
3 AVDD
MCKO 16
0.1µ
Top View
5 PDN
DVSS 14
6 CSN
DVDD 13
12 BICK
MCKI 15
11 FCK
4 VCOC
10 SDTO
Rp
9 SDTI
Cp
8 CDTI
+
R2
Speaker
R1
ZD2
7 CCLK
10µ
+
0.1µ
0.1µ
Analog Supply
2.2∼3.6V
MPI 23
1µ
MIC 24
+
2.2µ
R
2.2∼4.0V
SVSS 19
1µ
220
SVDD 20
C
2.2k
10µ
ZD1
Dynamic SPK :
R1,R2 : Short
ZD1,ZD2 : Open
Peizo SPK :
R1,R2 : 10Ω
ZD1,ZD2 : Required
0.1µ
10
DSP or µP
Figure 45. Typical Connection Diagram
MS0447-E-03
2006/04
- 63 -
ASAHI KASEI
[AK4633]
Differential Input
20k
1k
Analog Supply
+
2.2µ
SVSS 19
MICN 22
+
0.1µ
1 VCOM
SPN 18
2 AVSS
SPP 17
3 AVDD
MCKO 16
0.1µ
Top View
Rp
DVSS 14
6 CSN
DVDD 13
12 BICK
5 PDN
11 FCK
MCKI 15
10 SDTO
4 VCOC
9 SDTI
Cp
8 CDTI
+
R2
Speaker
R1
ZD2
7 CCLK
10µ
1µ
0.1µ
Analog Supply
2.2∼3.6V
MPI 23
MICP 24
1µ
AOUT 21
1µ
2.2∼4.0V
10µ
SVDD 20
220
1k
ZD1
Dynamic SPK :
R1,R2 : Short
ZD1,ZD2 : Open
Peizo SPK :
R1,R2 : 10Ω
ZD1,ZD2 : Required
0.1µ
10
DSP or µP
Figure 46. Typical Connection Diagram
Mode
0
1
2
3
4
5
6
7
12
13
Others
Note:
- AVSS, DVSS and SVSS of the AK4633 should be distributed separately from the ground of external
controllers.
- If AVDD and DVDD are separated, DVDD should be set from 1.6V to 3.6V.
- All digital input pins should not be left floating.
- When the AK4633 is EXT mode (PMPLL bit = “0”), a resistor and capacitor of VCOC pin is not needed.
- When the AK4633 is PLL mode (PMPLL bit = “1”), a resistor and capacitor of VCOC pin is shown in
Table 36.
PLL
Rp and Cp of
PLL Lock
Input
PLL3 PLL2 PLL1 PLL0
Reference
VCOC pin
Frequency
bit
bit
bit
bit
Clock Input
Rp[Ω] Cp[F] Time (max)
Pin
0
0
0
0
FCK pin
1fs
6.8k
220n
160ms
Default
0
0
0
1
BICK pin
16fs
10k
4.7n
2ms
0
0
1
0
BICK pin
32fs
10k
4.7n
2ms
0
0
1
1
BICK pin
64fs
10k
4.7n
2ms
0
1
0
0
MCKI pin
11.2896MHz
10k
4.7n
40ms
0
1
0
1
MCKI pin
12.288MHz
10k
4.7n
40ms
0
1
1
0
MCKI pin
12MHz
10k
4.7n
40ms
0
1
1
1
MCKI pin
24MHz
10k
4.7n
40ms
1
1
0
0
MCKI pin
13.5MHz
10k
10n
40ms
1
1
0
1
MCKI pin
27MHz
10k
10n
40ms
Others
N/A
Table 36. Setting of PLL Mode (*fs: Sampling Frequency)
MS0447-E-03
2006/04
- 64 -
ASAHI KASEI
[AK4633]
1. Grounding and Power Supply Decoupling
The AK4633 requires careful attention to power supply and grounding arrangements. AVDD, DVDD and SVDD are
usually supplied from the system’s analog supply. If AVDD, DVDD and SVDD are supplied separately, the correct
power up sequence should be observed. AVSS, DVSS and SVSS of the AK4633 should be connected to the analog
ground plane. System analog ground and digital ground should be connected together near to where the supplies are
brought onto the printed circuit board. Decoupling capacitors should be as near to the AK4633 as possible, with the small
value ceramic capacitor being the nearest.
2. Voltage Reference
VCOM is a signal ground of this chip. A 2.2µF electrolytic capacitor in parallel with a 0.1µF ceramic capacitor attached
to the VCOM pin eliminates the effects of high frequency noise. No load current may be drawn from the VCOM pin. All
signals, especially clocks, should be kept away from the VCOM pin in order to avoid unwanted coupling into the
AK4633.
3. Analog Inputs
The Mic and Beep inputs are single-ended. The input signal range scales with nominally at 0.06 x AVDD Vpp for the Mic
input and 0.6 x AVDD Vpp for the Beep input, centered around the internal common voltage (approx. 0.45 x AVDD).
Usually the input signal is AC coupled using a capacitor. The cut-off frequency is fc = (1/2πRC). The AK4633 can accept
input voltages from AVSS to AVDD.
4. Analog Outputs
The input data format for the DAC is 2’s complement. The output voltage is a positive full scale for 7FFFH(@16bit) and
a negative full scale for 8000H(@16bit). Mono output from the MOUT pin and Mono Line Output from the AOUT pin
are centered at 0.45 x AVDD (typ). The Speaker-Amp output is centered at SVDD/2.
MS0447-E-03
2006/04
- 65 -
ASAHI KASEI
[AK4633]
CONTROL SEQUENCE
„ Clock Set up
When ADC, DAC and Programmable Filter are used, the clocks must be supplied.
1. In case of PLL Master Mode
Example:
Audio I/F Format: DSP Mode, BCKP = MSBS = “0”
BICK frequency at Master Mode: 64fs
Input Master Clock Select at PLL Mode: 13.5MHz
MCKO : Enable
Sampling Frequency:16kHz
Power Supply
(1)
PDN pin
(2)
(3)
PMVCM bit
(1) Power Supply & PDN pin = “L” Æ “H”
(Addr:00H, D6)
(4)
MCKO bit
(Addr:01H, D1)
(2)Addr:01H, Data:08H
Addr:04H, Data:C8H
Addr:05H, Data:02H
PMPLL bit
(Addr:01H, D0)
(5)
MCKI pin
Input
(3)Addr:00H, Data:40H
M/S bit
(Addr:01H, D3)
40msec(max)
(6)
BICK pin
FCK pin
(4)Addr:01H, Data:0BH
Output
(7)
1msec (max)
MCKO, BICK and FCK output
40msec(max)
(9)
MCKO pin
(8)
Output
Figure 47. Clock Set Up Sequence (1)
<Example>
(1) After Power Up, PDN pin = “L” → “H”
“L” time (1) of 150ns or more is needed to reset the AK4633.
(2) DIF1-0, PLL3-0, FS3-0, BCKO1-0, MSBS, BCKP and M/S bits should be set during this period.
(3) Power Up VCOM: PMVCM bit = “0” → “1”
VCOM should first be powered-up before the other block operates.
(4) In case of using MCKO output: MCKO bit = “1”
In case of not using MCKO output: MCKO bit = “0”
(5) PLL lock time is 40ms(max) after PMPLL bit changes from “0” to “1” and MCKI is supplied from an external
source.
(6) The AK4633 starts to output the FCK and BICK clocks after the PLL becomes stable. The normal operation of
the block which a clock is necessary for becomes possible.
(7) The invalid frequencies are output from FCK and BICK pins during this period.
(8) The invalid frequency is output from MCKO pin during this period.
(9) The normal clock is output from MCKO pin after the PLL is locked.
MS0447-E-03
2006/04
- 66 -
ASAHI KASEI
[AK4633]
2. When the external clock (FCK or BICK pin) is used in PLL Slave mode.
Example:
Audio I/F Format : DSP Mode, BCKP = MSBS = “0”
PLL Reference clock: BICK
BICK frequency: 64fs
Sampling Frequency: 16kHz
Power Supply
4fs
(1)ofPower Supply & PDN pin = “L” Æ “H”
(1)
PDN pin
(2)
(3)
PMVCM bit
(2) Addr:04H, Data:30H
Addr:05H, Data:01H
(Addr:00H, D6)
PMPLL bit
(Addr:01H, D0)
FCK pin
BICK pin
(3) Addr:00H, Data:40H
Input
(4)
(4) Addr:01H, Data:01H
Internal Clock
(5)
BICK and FCK input
Figure 48. Clock Set Up Sequence (2)
<Example>
(1) After Power Up: PDN pin “L” → “H”
“L” time (1) of 150ns or more is needed to reset the AK4633.
(2) DIF1-0, FS3-0, PLL3-0, MSBS and BCKP bits should be set during this period.
(3) Power Up VCOM: PMVCM bit = “0” → “1”
VCOM should first be powered up before the other block operates.
(4) PLL starts after the PMPLL bit changes from “0” to “1” and PLL reference clocks (FCK or BICK pin) are
supplied. PLL lock time is 160ms(max) when PLL reference clock is FCK, and PLL lock time is 2ms(max) when
PLL reference clock is BICK.
(5) Normal operation starts after the PLL is locked.
MS0447-E-03
2006/04
- 67 -
ASAHI KASEI
[AK4633]
3. When the external clock (MCKI pin) is used in PLL Slave mode.
Example:
Audio I/F Format: DSP Mode, BCKP = MSBS = “0”
BICK frequency at Master Mode: 64fs
Input Master Clock Select at PLL Mode: 13.5MHz
MCKO : Enable
Sampling Frequency:16kHz
Power Supply
(1) Power Supply & PDN pin = “L” Æ “H”
(1)
PDN pin
(2)
(3)
(2)Addr:04H, Data:C8H
Addr:05H, Data:02H
PMVCM bit
(Addr:00H, D6)
(4)
PMPLL bit
(Addr:01H, D0)
(3)Addr:00H, Data:40H
(5)
MCKI pin
Input
40msec(max)
(4)Addr:01H, Data:03H
(6)
MCKO pin
Output
(7)
MCKO output start
(8)
BICK pin
FCK pin
Input
BICK and FCK input start
Figure 49. Clock Set Up Sequence (3)
<Example>
(1) After Power Up: PDN pin “L” → “H”
“L” time (1) of 150ns or more is needed to reset the AK4633.
(2) DIF1-0, PLL3-0, FS3-0, BCKO1-0, MSBS, BCKP and M/S bits should be set during this period.
(3) Power Up VCOM: PMVCM bit = “0” → “1”
VCOM should first be powered up before the other block operates.
(4) PLL Power Up: PMVCM bit “0” → “1”
(5) PLL lock time is 40ms(max) after the PMPLL bit changes from “0” to “1” and PLL reference clock (MCKI pin)
is supplied..
(6) The normal clock is output from MCKO after PLL is locked.
(7) The invalid frequency is output from MCKO during this period.
(8) BICK and FCK clocks should be synchronized with MCKO clock.
MS0447-E-03
2006/04
- 68 -
ASAHI KASEI
[AK4633]
4. EXT Slave Mode
Example
Audio I/F Format:MSB justified (ADC and DAC)
Input MCKI frequency: 1024fs
Sampling Frequency:16kHz
MCKO: Disable
Power Supply
(1)
(1) Power Supply & PDN pin = “L” Æ “H”
PDN pin
(2)
(3)
PMVCM bit
(Addr:00H, D6)
(2) Addr:04H, Data:02H
Addr:05H, Data:02H
(4)
PMPLL bit
(Addr:01H, D0)
"L"
(5)
MCKI pin
(3) Addr:00H, Data:40H
Input
(5)
FCK pin
BICK pin
Input
MCKI, BICK and FCK input
Figure 50. Clock Set Up Sequence (4)
<Example>
(1) After Power Up: PDN pin “L” → “H”
“L” time (1) of 150ns or more is needed to reset the AK4633.
(2) DIF1-0 and FS1-0 bits should be set during this period.
(3) Power Up VCOM: PMVCM bit = “0” → “1”
VCOM should first be powered up before the other block operates.
(4) Power down PLL: PMPLL bit = “0”
(5) Normal operation starts after the MCKI, FCK and BICK are supplied.
MS0447-E-03
2006/04
- 69 -
ASAHI KASEI
[AK4633]
„ MIC Input Recording
FS3-0 bits
(Addr:05H,
D5,D2-0)
XXXX
ADRST bit
(Addr:05H, D7)
MIC Control
(Addr:02H, D2-0)
ALC1 Control 1
(Addr:06H)
ALC1 Control 2
(Addr:08H)
XXXX
(1)
X
X
001
1XX
(2)
XXH
XXH
(3)
XXH
XXH
(4)
IVOL7-0 bits
(Addr:09H)
XXH
XXH
(5)
ALC1 Control 3
(Addr:07H)
Signal Select
(Addr:03H)
Filter Co-ef
(Addr:10H-1F)
Filter Select
(Addr:0EH D3-0)
XXH
2XH
(6)
XXH
81H
(7)
XX....X
XX....X
(8)
XXX1
XXX1
(9)
ALC1 State
ALC1 Disable
ALC1 Enable
ALC1 Disable
PMADC bit
(Addr:00H, D0)
(10)
PMPFIL bit
291/fs or 1059/fs
(Addr:00H, D7)
ADC Internal
State
(11)
Power Down
Initialize Normal State Power Down
Figure 51. MIC Input Recording Sequence
MS0447-E-03
2006/04
- 70 -
ASAHI KASEI
[AK4633]
Example:
PLL Master Mode
Audio I/F Format:DSP Mode, BCKP=MSBS=“0”
Sampling Frequency: 16kHz
Pre MIC AMP:+20dB
MIC Power On
ADC Initialize time : 291/fs
ALC1 setting:Refer to Table 32
HPFAD, HPF : ON (fc=150Hz)
2 band EQ : OFF
(1) Addr:05H, Data:82H
(2) Addr:02H, Data:05H
(3) Addr:06H, Data:14H
(4) Addr:08H, Data:C5H
(5) Addr:09H, Data:C5H
(6) Addr:07H, Data:2DH
(7) Addr:03H, Data:81H
(8-1) Addr:1CH, Data:16H
(8-2) Addr:1DH, Data:1FH
(8-3) Addr:1EH, Data:2BH
(8-4) Addr:1FH, Data:1EH
(9) Addr:0EH, Data:03H
(10) Addr:00H, Data:C1H
Recording
(11) Addr:00H, Data:40H
Figure 52. MIC Input Recording Sequence Example
MS0447-E-03
2006/04
- 71 -
ASAHI KASEI
[AK4633]
<Example>
This sequence is an example of ALC1 setting at fs=16kHz. If the parameter of the ALC1 is changed, please refer to
“Table 32. Example of the ALC Setting (Recording)“
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up a sampling frequency (FS3-0 bit) and ADC initialization cycle. When the AK4633 is PLL mode,
Programmable Filter and ADC should be powered-up in consideration of PLL lock time after a sampling
frequency is changed.
(2) Set up MIC input (Addr: 02H)
(3) Set up Timer Select for ALC1 (Addr: 06H)
(4) Set up REF value for ALC1 (Addr: 08H)
(5) Set up IVOL value at start ALC1 (Addr: 09H)
(6) Set up LMTH0, RGAIN0, LMAT1-0, ZELM and ALC1 bits (Addr: 07H)
(7) Set up path of programmable filter: PFSDO bit = ADCPF bit = “1”
(8) Set up coefficient of programmable filter (HPF/EQ): Addr: 10H ∼ 1FH
(9) Set up ON/OFF of programmable filter (HPF/EQ)
HPFAD bit should be set to “1”.
(10) Power Up programmable filter and ADC: PMPFIL bit = PMADC bit = “0” → “1”
The initialization cycle time of ADC is [email protected]=16kHz when ADRST bit = “0”,
and [email protected]=16kHz when ADRST bit = “1”. The ALC1 starts at IVOL value set by (5).
(11) Power Down programmable filter and ADC: PMPFIL bit = PMADC bit = “1” → “0”
MS0447-E-03
2006/04
- 72 -
ASAHI KASEI
[AK4633]
„ Speaker-amp Output
FS3-0 bits
(Addr:05H,
D5,D2-0)
XXXX
XXXX
(1)
(13)
DACS bit
(Addr:02H, D3)
(2)
ALC2 Control 1
(Addr:06H)
ALC2 Control 2
(Addr:10H)
XXH
XXH
(3)
XXH
XXH
(4)
OVOL7-0 bits
(Addr:0AH)
XXH
XXH
(5)
ALC2 Control 3
(Addr:07H)
Signal Select
(Addr:03H)
Filter Co-ef
(Addr:10H-1F)
Filter Select
(Addr:0EH D3-0)
XXH
4XH
(6)
XXXXXXXX
000XX010
(7)
XX....X
XX....X
(8)
XXX1
XX11
(9)
ALC2 State
ALC2 Disable
ALC2 Disable
ALC2 Enable
PMPFIL bit
(Addr:00H, D7)
(14)
PMDAC bit
(Addr:00H, D2)
(10)
PMSPK bit
(Addr:00H, D4)
(11)
SPPSN bit
(Addr:02H, D7)
(12)
SPP pin
SPN pin
Hi-Z
Hi-Z
Normal Output
SVDD/2
Normal Output
Hi-Z
SVDD/2
Hi-Z
Figure 53. Speaker-Amp Output Sequence
MS0447-E-03
2006/04
- 73 -
ASAHI KASEI
[AK4633]
Example:
PLL Master Mode
Audio I/F Format:DSP Mode, BCKP=MSBS=“0”
Sampling Frequency: 16kHz
SPKG1-0 bits = “01”
ALC2 : ON
ALC2 setting:Refer to Table 33
HPF : ON (fc=150Hz)
2 band EQ : OFF
(1) Addr:05H, Data:02H
(2) Addr:02H, Data:20H
(3) Addr:06H, Data:14H
(4) Addr:0BH, Data:28H
(5) Addr:0AH, Data:91H
(6) Addr:07H, Data:4DH
(7) Addr:03H, Data:0AH
(8-1) Addr:1CH, Data:16H
(8-2) Addr:1DH, Data:1FH
(8-3) Addr:1EH, Data:2BH
(8-4) Addr:1FH, Data:1EH
(9) Addr:0EH, Data:03H
(10) Addr:00H, Data:D4H
(11) Addr:02H, Data:A0H
Playback
(12) Addr:02H, Data:20H
(13) Addr:02H, Data:00H
(14) Addr:00H, Data:40H
Figure 54. Speaker-Amp Output Sequence Example
MS0447-E-03
2006/04
- 74 -
ASAHI KASEI
[AK4633]
<Example>
This sequence is an example of ALC2 setting at fs=16kHz. If the parameter of the ALC2 is changed, please refer to
“Table 33. Example of the ALC Setting (Playback)”.
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up a sampling frequency (FS3-0 bits). When the AK4633 is PLL mode, DAC and Speaker-Amp should be
powered-up in consideration of PLL lock time after a sampling frequency is changed.
(2) Set up the path of “DAC Æ SPK-Amp”: DACS bit: “0” → “1”
(3) Set up the ALC2 Timer (Addr: 06H)
(4) Set up the REF value of ALC2 (Addr: 08H)
(5) Set up OVOL value at start ALC2 (Addr: 10H), RGAIN1 and LMTH1
(6) Set up LMTH0, RGAIN0, LMAT1-0, ZELM and ALC2 bits (Addr: 07H)
(7) Set up path of programmable filter and SPK-Amp gain:
PFDAC bit = “1”, ADCPF bit = “0”, SPKG1-0 bits = “XX”
(8) Set up coefficient of programmable filter (HPF/EQ): Addr: 10H ∼ 1FH
(9) Set up ON/OFF of programmable filter (HPF/EQ)
HPF bit is recommended to “1”.
(10) Power Up DAC, SPK and programmable filter:
PMDAC bit = PMSPK bit = PMPFIL bit = “0” → “1”
(11) Exit Speaker power-save-mode: SPPSN bit = “0” → “1”
SPPSN bit should be set to “1” at more than 1ms after PMSPK bit is set to “1”.
(12) Enter Speaker power-save-mode: SPPSN bit = “1” → “0”
(13) Disable the path of “DAC Æ SPK-Amp”: DACS bit = “1” → “0”
(14) Power Down DAC, Speaker and programmable filter: PMDAC bit = PMSPK bit = PMPFIL bit = “1” → “0”
MS0447-E-03
2006/04
- 75 -
ASAHI KASEI
[AK4633]
„ BEEP signal output from Speaker-Amp
Example:
Clocks can be stopped.
CLOCK
(1) Addr:00H, Data:70H
PMBP bit
(Addr:00H, D2)
(1)
(2) Addr:02H, Data:40H
(5)
PMSPK bit
(Addr:00H, D4)
(3) Addr:02H, Data:C0H
(2)
(6)
BEEPS bit
(Addr:02H, D6)
BEEP Signal Output
(3)
SPPSN bit
(4) Addr:02H, Data:40H
(Addr:02H, D7)
(4)
SPP pin
SPN pin
Hi-Z
Hi-Z
Normal Output
SVDD/2
Normal Output
Hi-Z
SVDD/2
(5) Addr:00H, Data:40H
Hi-Z
(6) Addr:02H, Data:00H
Figure 55. “BEEP-Amp Æ Speaker-Amp” Output Sequence
<Example>
The clock is not needed to supply when only BEEP-Amp and Speaker-Amp are operating.
(1) Power Up BEEP-Amp and Speaker-Amp: PMBP bit = PMSPK bit = “0” → “1”
(2) Enable the path of “BEEP Æ SPK-Amp”: BEEPS bit = “0” → “1”
(3) Exit the power-save-mode of Speaker-Amp: SPPSN bit = “0” → “1”
“(4)” time depends on the time constant of external resistor and capacitor connected to BEEP pin. If
Speaker-Amp output is enabled before input of BEEP-Amp becomes stable, pop noise may occur.
e.g. R=20k, C=0.1µF: Recommended wait time is more than 5τ = 10ms.
(4) Enter the power-save-mode of Speaker-Amp: SPPSN bit = “1” → “0”
(5) Power Down BEEP-Amp and Speaker-Amp: PMBP bit = PMSPK bit = “1” → “0”
(6) Disable the path of “BEEP Æ SPK-Amp”: BEEPS bit = “1” → “0”
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ASAHI KASEI
[AK4633]
„ MONO LINEOUT
Example:
FS3-0 bits
(Addr:05H,
D5, D2-0)
PLL, Master Mode
Audio I/F Format :DSP Mode, BCKP=MSBS= “0”
Sampling Frequency: 16kHz
Digital Volume: 0dB
XXXX
XXXX
(1)
(1) Addr:05H, Data:02H
(11)
DACA bit
(2)
(Addr:02H, D4)
(2) Addr:02H, Data:10H
(3)
ADCPF bit
0 or 1
0
(3) Addr:03H, Data:02H
1
(4) Addr:07H, Data:00H
(Addr:03H, D0)
PFDAC bit
(Addr:03H, D1)
0 or 1
(4)
ALC2 bit
0 or 1
(5) Addr:0AH, Data:91H
0
(Addr:07H, D6)
(6) Addr:03H, Data:42H
(5)
OVOL7-0 bits
(Addr:0AH, D7-0)
XXH
XXH
(7) Addr:00H, Data:CCH
AOPS bit
(Addr:03H, D6)
(6)
(9)
(8)
(12)
(8) Addr:03H, Data:02H
PMDAC bit
(Addr:00H, D2)
Playback
(7)
(10)
PMPFIL bit
(9) Addr:03H, Data:42H
(Addr:00H, D7)
PMAO bit
(Addr:00H, D3)
(10) Addr:00H, Data:40H
>300 ms
>300 ms
AOUT pin
Normal Output
(11) Addr:02H, Data:00H
(12) Addr:03H, Data:02H
Figure 56. Mono Lineout Sequence
<Example>
This sequence is an example of Digital Output Volume at manual mode.
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up a sampling frequency (FS3-0 bits).
DAC should be powered-up in consideration of PLL lock time.
(2) Set up the path of “DAC Æ Mono Line Amp”: DACA bit: “0” → “1”
(3) Set up the path: ADCPF bit = “0”, PFDAC bit = “1”
(4) Disable ALC2: ALC2 bit = “0”
(5) Set up the digital volume (Addr: 0AH)
(6) Enter the power-save-mode of AOUT: AOPS bit: “0” → “1”
(7) Power Up DAC, programming filter and mono lineout.
PMDAC bit = PMPFIL bit = PMAO bit = “0” → “1”
AOUT pin powers up at rise edge. The rise time is 300ms(max) when C = 1µF.
(8) Exit the power-save-mode of AOUT: AOPS bit: “1” → “0”
The setting should be down after AOUT pin rises up. After the setting, the signal is output from AOUT pin.
(9) Enter the power-save-mode of AOUT: AOPS bit: “0” → “1”
(10) Power Down DAC, programmable filter and mono lineout.
PMDAC bit = PMPFIL bit = PMAO bit = “1” → “0”
AOUT pin powers up at fall edge. The fall time is 300ms(max) when C = 1µF.
(11) Disable the path of “DAC Æ Mono Line Amp”: DACA bit: “1” → “0”
(12) Exit the power-save-mode of AOUT: AOPS bit: “1” → “0”
The setting should be down after the AOUT pin fall down.
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ASAHI KASEI
[AK4633]
„ Stop of Clock
Master clock can be stopped when ADC, DAC and programmable filter don’t operate.
1. PLL Master Mode
Example:
Audio I/F Format: DSP Mode, BCKP = MSBS = “0”
BICK frequency at Master Mode : 64fs
Input Master Clock Select at PLL Mode : 11.2896MHz
Sampling Frequency:8kHz
(1)
PMPLL bit
(Addr:01H, D0)
(1) (2) Addr:01H, Data:08H
(2)
MCKO bit
"H" or "L"
Stop an external MCKI
(Addr:01H, D1)
(3)
External MCKI
Input
Figure 57. Clock Stopping Sequence (1)
<Example>
(1) Power down PLL: PMPLL bit = “1” → “0”
(2) Stop MCKO clock: MCKO bit = “1” → “0”
(3) Stop an external master clock.
2. PLL Slave Mode (FCK or BICK pins)
Example
Audio I/F Format : DSP Mode, BCKP = MSBS = “0”
PLL Reference clock: BICK
BICK frequency: 64fs
Sampling Frequency: 8kHz
(1)
PMPLL bit
(Addr:01H,D0)
(2)
External BICK
Input
(1) Addr:01H, Data:04H
(2)
External FCK
Input
(2) Stop the external clocks
Figure 58. Clock Stopping Sequence (2)
<Example>
(1) Power down PLL: PMPLL bit = “1” → “0”
(2) Stop the external BICK and FCK clocks.
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ASAHI KASEI
[AK4633]
3. PLL Slave Mode (MCKI pin)
Example
(1)
Audio I/F Format : DSP Mode, BCKP = MSBS = “0”
PLL Reference clock: MCKI
BICK frequency: 64fs
Sampling Frequency: 8kHz
PMPLL bit
(Addr:01H, D0)
(1)
MCKO bit
(1) Addr:01H, Data:00H
(Addr:01H, D1)
(2)
External MCKI
Input
(2) Stop the external clocks
Figure 59. Clock Stopping Sequence (3)
<Example>
(1) Power down PLL: PMPLL bit = “1” → “0”
Stop MCKO output: MCKO bit = “1” → “0”
(2) Stop the external master clock.
4. EXT Slave Mode
Example
(1)
External MCKI
Input
External BICK
Input
Audio I/F Format :MSB justified(ADC and DAC)
Input MCKI frequency:1024fs
Sampling Frequency:8kHz
(1)
(1) Addr:01H, Data:00H
(1)
External FCK
Input
(2) Stop the external clocks
Figure 60. Clock Stopping Sequence (4)
<Example>
(1) Stop the external MCKI, BICK and FCK clocks.
„ Power down
If the clocks are supplied, power down VCOM (PMVCM bit: “1” → “0”) after all blocks except for VCOM are
powered-down and a master clock stops. The AK4633 is also powered-down by PDN pin = “L”. When PDN pin = “L”,
the registers are initialized.
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ASAHI KASEI
[AK4633]
Package
24pin QFN (Unit: mm)
4.0 ± 0.1
2.4 ± 0.15
13
18
19
2.4± 0.15
4.0 ± 0.1
12
A
Exposed
Pad
24
7
0.40 ± 0.1
6
1
B
0.5
0.2
0.08
0.10 M
PIN #1 ID
(0.35 x 45 )
0.75± 0.05
0.23 ± 0.05
Note) The exposed pad on the bottom surface of the package must be open or connected to GND.
„ Material & Lead finish
Package molding compound:
Lead frame material:
Lead frame surface treatment:
Epoxy
Cu
Solder (Pb free) plate
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ASAHI KASEI
[AK4633]
MARKING
4633
XXXX
1
XXXX: Date code (4 digit)
Pin #1 indication
Revision History
Date (YY/MM/DD)
05/12/26
06/04/28
Revision
00
03
Reason
First Edition
Error Correct
Error Correct
Page
Contents
40
41
Table 19 : PDSDO bit → PFSDO bit
2 Band Equalizer : The Coefficient of C is corrected.
[Before correct]
1 − tan (πfb/fs)
C=
1 + tan (πfb/fs)
[After correct]
1 − tan (πfb/fs)
C= −
1 + tan (πfb/fs)
Add
Explanation
Add
Explanation
42
Error Correct
54
53, 75
MS0447-E-03
2 Band Equalizer : The note is added when these
equalizer are used as notch filters
Speaker-Amp Control Sequence
The wait time from PMSPK bit = “1” to SPPSN bit is
“1” is added.
Serial control interface
Bit6 in Figure 43 : A2 → A1
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ASAHI KASEI
[AK4633]
IMPORTANT NOTICE
• These products and their specifications are subject to change without notice. Before considering any
use or application, consult the Asahi Kasei Microsystems Co., Ltd. (AKM) sales office or authorized
distributor concerning their current status.
• AKM assumes no liability for infringement of any patent, intellectual property, or other right in the
application or use of any information contained herein.
• Any export of these products, or devices or systems containing them, may require an export license
or other official approval under the law and regulations of the country of export pertaining to customs
and tariffs, currency exchange, or strategic materials.
• AKM products are neither intended nor authorized for use as critical components in any safety, life
support, or other hazard related device or system, and AKM assumes no responsibility relating to any
such use, except with the express written consent of the Representative Director of AKM. As used
here:
a. A hazard related device or system is one designed or intended for life support or maintenance of
safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its
failure to function or perform may reasonably be expected to result in loss of life or in significant
injury or damage to person or property.
b. A critical component is one whose failure to function or perform may reasonably be expected to
result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or
system containing it, and which must therefore meet very high standards of performance and
reliability.
• It is the responsibility of the buyer or distributor of an AKM product who distributes, disposes of,
or otherwise places the product with a third party to notify that party in advance of the above content
and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability
for and hold AKM harmless from any and all claims arising from the use of said product in the
absence of such notification.
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