Data Sheet

[AK4588]
AK4588
2/8-Channel Audio CODEC with DIR
GENERAL DESCRIPTION
The AK4588 is a single chip CODEC that includes two channels of ADC and eight channels of DAC. The
ADC outputs 24bit data and the DAC accepts up to 24bit input data. The ADC has the Enhanced Dual Bit
architecture with wide dynamic range. The DAC introduces the new developed Advanced Multi-Bit
architecture, and achieves wider dynamic range and lower outband noise. The AK4588 has a dynamic
range of 102dB for ADC, 106dB for DAC and is well suited for digital surround for home theater and car
audio. The AK4588 also has the balance volume control corresponding to Dolby Digital (AC-3) system,
digital audio receiver (DIR) and transmitter (DIT) compatible with 192kHz, 24bits. The DIR has 8-channel
input selector and can automatically detect a Non-PCM bit stream. The AK4588 provides a fully
compatibility of hardware and software with the AK4628A and the AK4114.
*Dolby Digital is a trademark of Dolby Laboratories.
FEATURES
† ADC/DAC part
† 2ch 24bit ADC
- 64x Oversampling
- Sampling Rate up to 96kHz
- Linear Phase Digital Anti-Alias Filter
- Single-Ended Input
- S/(N+D): 92dB
- Dynamic Range, S/N: 102dB
- Digital HPF for offset cancellation
- Overflow flag
† 8ch 24bit DAC
- 128x Oversampling
- Sampling Rate up to 192kHz
- 24bit 8 times Digital Filter
- Single-Ended Outputs
- On-chip Switched-Capacitor Filter
- S/(N+D): 90dB
- Dynamic Range, S/N: 106dB
- Individual channel digital volume with 128 levels and 0.5dB step
- Soft mute
- Zero Detect Function
† High Jitter Tolerance
† Extenal Master Clock Input:
- 256fs, 384fs, 512fs (fs=32kHz ∼ 48kHz)
- 128fs, 192fs, 256fs (fs=64kHz ∼ 96kHz)
- 128fs (fs=120kHz ∼ 192kHz)
MS0287-E-03
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[AK4588]
† DIR/DIT Part
† AES3, IEC60958, S/PDIF, EIAJ CP1201 Compatible
† Low jitter Analog PLL
† PLL Lock Range : 32kHz to 192kHz
† Clock Source: PLL or X'tal
† 8-channel Receiver input
† 2-channel Transmission output (Through output or DIT)
† Auxiliary digital input
† De-emphasis for 32kHz, 44.1kHz, 48kHz and 96kHz
† Detection Functions
- Non-PCM Bit Stream Detection
- DTS-CD Bit Stream Detection
- Sampling Frequency Detection
(32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz)
- Unlock & Parity Error Detection
- Validity Flag Detection
† Up to 24bit Audio Data Format
† Audio I/F: Master or Slave Mode
† 40-bit Channel Status Buffer
† Burst Preamble bit Pc and Pd Buffer for Non-PCM bit stream
† Q-subcode Buffer for CD bit stream
† Serial μP I/F
† Two Master Clock Outputs: 64fs/128fs/256fs/512fs
† TTL Level Digital I/F
† 4-wire Serial and I2C Bus μP I/F for mode setting
† Operating Voltage: 4.5 to 5.5V with 5V tolerance
† Power Supply for output buffer: 2.7 to 5.5V
† 80pin LQFP Package (0.5mm pitch)
MS0287-E-03
2009/05
-2-
[AK4588]
■ Block Diagram
PVSS PVDD
R
XTI
XTO
RX0
X'tal
Clock
Recovery
RX1
RX2
RX3
RX4
RX5
8 to 3
Oscillator
Clock
Generator
Input
MCKO1
MCKO2
Selector
DEM
RX6
DAIF
RX7
Audio
Decoder
I/F
LRCK2
BICK2
SDTO2
TX0
DAUX2
PDN
TX1
AVDD
I2C
DIT
AVSS
DVDD
CSN
AC-3/MPEG
DVSS
TVDD
VIN
Detect
Error &
STATUS
Detect
Q-subcode
buffer
CCLK
CDTO
CDTI
INT0
INT1
B,C,U,
VOUT
ADC
LIN
RIN
LOUT1
μP I/F
LPF
HPF
Audio
I/F
ADC
HPF
DAC
DATT
DEM
MCLK
MCLK
LRCK
BICK
LRCK1
BICK1
ROUT1
LPF
DAC
DATT
DEM
LOUT2
LPF
DAC
DATT
DEM
ROUT2
LPF
DAC
DATT
DEM
LOUT3
LPF
DAC
DATT
DEM
ROUT3
LPF
DAC
DATT
DEM
LOUT4
LPF
DAC
DATT
DEM
ROUT4
LPF
DAC
DATT
DEM
DAUX1
Format
Converter
SDOUT
SDTO1
SDIN1
SDIN2
SDIN3
SDIN4
MS0287-E-03
SDTI1
SDTI2
SDTI3
SDTI4
2009/05
-3-
[AK4588]
■ Ordering Guide
AK4588VQ
AKD4588
-40 ∼ +85°C
80pin LQFP(0.5mm pitch)
Evaluation Board for AK4588
(Top View)
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
NC
LOUT3
NC
ROUT4
NC
LOUT4
DZF1
DZF2
MASTER
PDN
XTL0
XTL1
SDTI1
SDTI2
SDTI3
SDTI4
DAUX1
CSN
CDTI/SDA
CCLK/SCL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
INT1
BOUT
TVDD
DVDD
DVSS
XTO
XTI
TEST3
MCKO2
MCKO1
COUT
UOUT
VOUT
SDTO2
BICK2
LRCK2
SDTO1
BICK1
LRCK1
CDTO
RX2
NC
RX3
PVSS
R
PVDD
RX4
TEST2
RX5
CAD0
RX6
CAD1
RX7
I2C
DAUX2
VIN
MCLK
TX0
TX1
INT0
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
60
59
TEST1
RX1
NC
RX0
AVSS
AVDD
VREFH
VCOM
RIN
LIN
NC
ROUT1
NC
LOUT1
NC
ROUT2
NC
LOUT2
NC
ROUT3
■ Pin Layout
MS0287-E-03
2009/05
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[AK4588]
■ Compatibility with AK4628 + AK4114
Functions
AK4628+ AK4114
AK4588
Parallel control mode
Yes
No
TDM0, DFS0, DZFE, SDOS,
Available
Not available
SMUTE pins
Chip
4 wire serial
AK4628: Set by CAD1/0 pins
ADC/DAC part: Set by CAD1/0 pins
address(*)
(I2C pin= “L”)
AK4114: Fixed to “00”
DIR/DIT part: Fixed to “00”
I2C Bus
AK4628: Set by CAD1/0 pins
ADC/DAC part: Set by CAD1/0 pins
(I2C pin = “H”) AK4114: Set by CAD1/0 pins
DIR/DIT part: Fixed to “00”
(*) The AK4588 has two register maps including ADC/DAC part (compatible with the AK4628) and DIR/DIT part
(compatible with the AK4114). Each register is selected by Chip Address.
MS0287-E-03
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[AK4588]
PIN/FUNCTION
No.
1
Pin Name
INT1
I/O
O
2
3
4
5
6
7
BOUT
O
TVDD
DVDD
DVSS
XTO
XTI
O
I
8
TEST3
I
9
10
11
12
13
14
15
16
17
18
19
20
MCKO2
MCKO1
COUT
UOUT
VOUT
SDTO2
BICK2
LRCK2
SDTO1
BICK1
LRCK1
CDTO
CCLK
SCL
CDTI
SDA
21
22
23
CSN
24
25
26
27
28
29
30
DAUX1
SDTI4
SDTI3
SDTI2
SDTI1
XTL1
XTL0
O
O
O
O
O
O
I/O
I/O
O
I/O
I/O
O
I
I
I
I/O
I
I
I
I
I
I
I
I
I
Function
Interrupt 1 Pin
Block-Start Output Pin for Receiver Input
“H” during first 40 flames.
Output Buffer Power Supply Pin, 2.7V∼5.5V
Digital Power Supply Pin, 4.5V∼5.5V
Digital Ground Pin
X'tal clock Output Pin
X'tal / External clock Input Pin
Test 3 Pin
This pin should be connected to DVSS.
Master Clock Output 2 Pin
Master Clock Output 1 Pin
C-bit Output Pin for Receiver Input
U-bit Output Pin for Receiver Input
V-bit Output Pin for Receiver Input
Audio Serial Data Output Pin (DIR/DIT part)
Audio Serial Data Clock Pin (DIR/DIT part)
Channel Clock Pin (DIR/DIT part)
Audio Serial Data Output Pin (ADC/DAC part)
Audio Serial Data Clock Pin (ADC/DAC part)
Input Channel Clock Pin
Control Data Output Pin in Serial Mode, I2C pin= “L”.
Control Data Clock Pin in Serial Mode, I2C pin= “L”
Control Data Clock Pin in Serial Mode, I2C pin= “H”
Control Data Input Pin in Serial Mode, I2C pin= “L”.
Control Data Pin in Serial Mode, I2C pin= “H”.
Chip Select Pin in Serial Mode, I2C pin= “L”.
This pin should be connected to DVSS, I2C pin= “H”.
AUX Audio Serial Data Input Pin (ADC/DAC part)
DAC4 Audio Serial Data Input Pin
DAC3 Audio Serial Data Input Pin
DAC2 Audio Serial Data Input Pin
DAC1 Audio Serial Data Input Pin
X’tal Frequency Select 0 Pin
X’tal Frequency Select 1 Pin
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[AK4588]
No.
Pin Name
I/O
31
PDN
I
32
MASTER
I
DZF2
O
OVF
O
34
DZF1
O
35
LOUT4
O
36
NC
-
37
ROUT4
O
38
NC
-
39
LOUT3
O
40
NC
-
41
ROUT3
O
42
NC
-
43
LOUT2
O
44
NC
-
45
ROUT2
O
46
NC
-
47
LOUT1
O
48
NC
-
49
ROUT1
O
50
NC
-
51
52
LIN
RIN
I
I
53
VCOM
-
54
VREFH
-
33
Function
Power-Down Mode Pin
When “L”, the AK4588 is powered-down, all output pin goes “L”, all registers are
reset. When CAD1-0 pins are changed, the AK4588 should be reset by the PDN pin.
Master Mode Select Pin
“H”: Master mode, “L”: Slave mode
Zero Input Detect 2 Pin
(Table 13)
When the input data of the group 1 follow total 8192 LRCK cycles with “0” input
data, this pin goes to “H”. When RSTN1 bit is “0” or PWDAN bit is “0”, this pin
goes to “H”.
Analog Input Overflow Detect Pin
This pin goes to “H” if the analog input of Lch or Rch overflows. This pin becomes
OVF pin if OVFE bit is set to 1.
Zero Input Detect 1 Pin
(Table 13)
When the input data of the group 1 follow total 8192 LRCK cycles with “0” input
data, this pin goes to “H”. When RSTN1 bit is “0” or PWDAN bit is “0”, this pin goes
to “H”.
DAC4 Lch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
DAC4 Rch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
DAC3 Lch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
DAC3 Rch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
DAC2 Lch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
DAC2 Rch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
DAC1 Lch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
DAC1 Rch Analog Output Pin
No Connect pin
No internal bonding. This pin should be opened.
Lch Analog Input Pin
Rch Analog Input Pin
Common Voltage Output Pin
2.2μF capacitor should be connected to AVSS externally.
Positive Voltage Reference Input Pin, AVDD
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[AK4588]
No.
55
56
57
Pin Name
AVDD
AVSS
RX0
I/O
I
Function
Analog Power Supply Pin, 4.5V∼5.5V
Analog Ground Pin, 0V
Receiver Channel 0 Pin (Internal biased pin. Internally biased at PVDD/2)
No Connect pin
58
NC
No internal bonding. This pin should be connected to PVSS.
59
RX1
I
Receiver Channel 1 Pin (Internal biased pin. Internally biased at PVDD/2)
Test 1 Pin
60
TEST1
I
This pin should be connected to PVSS.
61
RX2
I
Receiver Channel 2 Pin (Internal biased pin. Internally biased at PVDD/2)
No Connect pin
62
NC
No internal bonding. This pin should be connected to PVSS.
63
RX3
I
Receiver Channel 3 Pin (Internal biased pin. Internally biased at PVDD/2)
64
PVSS
PLL Ground pin
External Resistor Pin
65
R
12kΩ +/-1% resistor should be connected to PVSS externally.
66
PVDD
PLL Power supply Pin, 4.5V∼5.5V
67
RX4
I
Receiver Channel 4 Pin (Internal biased pin. Internally biased at PVDD/2)
Test 2 Pin
68
TEST2
I
This pin should be connected to PVSS.
69
RX5
I
Receiver Channel 5 Pin (Internal biased pin. Internally biased at PVDD/2)
Chip Address 0 Pin (ADC/DAC part)
70
CAD0
I
71
RX6
I
Receiver Channel 6 Pin (Internal biased pin. Internally biased at PVDD/2)
Chip Address 1 Pin (ADC/DAC part)
72
CAD1
I
73
RX7
I
Receiver Channel 7 Pin (Internal biased pin. Internally biased at PVDD/2)
Control Mode Select Pin.
74
I2C
I
“L”: 4-wire Serial, “H”: I2C Bus
75
DAUX2
I
Auxiliary Audio Data Input Pin (DIR/DIT part)
76
VIN
I
V-bit Input Pin for Transmitter Output
Master Clock Input Pin
77
MCLK
I
78
TX0
O
Transmit Channel (Through Data) Output 0 Pin
Transmit Channel Output1 pin
79
TX1
O
When TX bit = “0”, Transmit Channel (Through Data) Output 1 Pin.
When TX bit = “1”, Transmit Channel (DAUX2 Data) Output Pin (default).
80
INT0
O
Interrupt 0 Pin
Note: All input pins except internal biased pins and internal pull-down pin should not be left floating.
PVDD
RX pin
20k(typ)
20k(typ)
PVSS
VCOM
Internal biased pin Circuit
MS0287-E-03
2009/05
-8-
[AK4588]
■ Handling of Unused Pin
The unused I/O pins should be processed appropriately as below.
Classification
Analog
Digital
Pin Name
RX7-0, LOUT4-1, ROUT4-1, LIN, RIN
INT1-0, BOUT, XTO, MCKO2-1, COUT, UOUT,
VOUT, SDTO2-1, CDTO, DZF2-1, TX1-0
CSN, DAUX2-1, SDTI4-1, XTL1-0, TEST3
TEST1-2
MS0287-E-03
Setting
These pins should be open.
These pins should be open.
These pins should be connected to DVSS.
These pins should be connected to PVSS.
2009/05
-9-
[AK4588]
ABSOLUTE MAXIMUM RATINGS
(AVSS=DVSS=PVSS=0V; Note 1)
Parameter
Power Supplies
Analog
Digital
PLL
Output buffer
|AVSS-DVSS|
(Note 2)
|AVSS-PVSS|
(Note 2)
Input Current (any pins except for supplies)
Analog Input Voltage
(LIN, RIN pins)
Digital Input Voltage
Except LRCK1-2, BICK1-2, RX0-7, CAD0-1,
TEST1-2 pins
LRCK1-2, BICK1-2 pins
RX0-7, CAD0-1, TEST1-2
Ambient Temperature (power applied)
Storage Temperature
Symbol
AVDD
DVDD
PVDD
TVDD
ΔGND1
ΔGND2
IIN
min
-0.3
-0.3
-0.3
-0.3
-
max
6.0
6.0
6.0
6.0
0.3
0.3
±10
Units
V
V
V
V
V
V
mA
VINA
-0.3
AVDD+0.3
V
VIND1
-0.3
DVDD+0.3
V
VIND2
VIND3
Ta
Tstg
-0.3
-0.3
-40
-65
TVDD+0.3
PVDD+0.3
85
150
V
V
°C
°C
Note 1 All voltages with respect to ground.
Note 2. AVSS, DVSS and PVSS must be connected to the same analog ground plane.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(AVSS=DVSS=PVSS=0V; Note 3)
Parameter
Symbol
min
typ
Analog
Power Supplies
AVDD
4.5
5.0
Digital
(Note 4)
DVDD
4.5
5.0
PLL
PVDD
4.5
5.0
Output buffer
TVDD
2.7
5.0
max
5.5
AVDD
AVDD
DVDD
Units
V
V
V
V
Note 3. All voltages with respect to ground.
Note 4. The power up sequence between AVDD, DVDD, PVDD and TVDD is not critical. To save leak current in
power down mode, AVDD, DVDD, PVDD become the same voltage as much as possible.
WARNING: AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
MS0287-E-03
2009/05
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[AK4588]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=PVDD=TVDD=5V; AVSS=DVSS=0V; VREFH=AVDD; fs=48kHz; BICK=64fs;
Signal Frequency=1kHz; 24bit Data; Measurement Frequency=20Hz∼20kHz at fs=48kHz, 20Hz~40kHz at fs=96kHz;
20Hz~40kHz at fs=192kHz, unless otherwise specified)
Parameter
min
typ
max
Units
ADC Analog Input Characteristics
Resolution
24
Bits
S/(N+D)
(-0.5dBFS) fs=48kHz
84
92
dB
fs=96kHz
86
dB
DR
(-60dBFS) fs=48kHz, A-weighted
94
102
dB
fs=96kHz
88
96
dB
fs=96kHz, A-weighted
93
102
dB
S/N
(Note 5)
fs=48kHz, A-weighted
94
102
dB
fs=96kHz
88
96
dB
fs=96kHz, A-weighted
93
102
dB
Interchannel Isolation
90
110
dB
DC Accuracy
Interchannel Gain Mismatch
0.2
0.3
dB
Gain Drift
20
ppm/°C
Input Voltage
AIN=0.62xVREFH
2.90
3.10
3.30
Vpp
Input Resistance
fs=48kHz
15
25
kΩ
fs=96kHz
9
16
kΩ
Power Supply Rejection
(Note 6)
50
dB
DAC Analog Output Characteristics
Resolution
24
Bits
S/(N+D)
fs=48kHz
80
90
dB
fs=96kHz
78
88
dB
fs=192kHz
88
dB
DR
(-60dBFS)
fs=48kHz, A-weighted
95
106
dB
fs=96kHz
88
100
dB
fs=96kHz, A-weighted
94
106
dB
fs=192kHz
100
dB
fs=192kHz, A-weighted
106
dB
S/N
(Note 7)
fs=48kHz, A-weighted
95
106
dB
fs=96kHz
88
100
dB
fs=96kHz, A-weighted
94
106
dB
fs=192kHz
100
dB
fs=192kHz, A-weighted
106
dB
Interchannel Isolation
90
110
dB
DC Accuracy
Interchannel Gain Mismatch
0.2
0.5
dB
Gain Drift
20
ppm/°C
Output Voltage
AOUT=0.6xVREFH
2.75
3.0
3.25
Vpp
Load Resistance
5
kΩ
Power Supply Rejection
(Note 6)
50
dB
Power Supplies
Power Supply Current
Normal Operation (PDN = “H”)
(Note 7)
50
AVDD
fs=48kHz,fs=96kHz
70
mA
37
fs=192kHz
52
mA
12
PVDD
17
mA
44
DVDD+TVDD
fs=48kHz
(Note 9)
62
mA
fs=96kHz
57
80
mA
fs=192kHz
68
95
mA
Power-down mode (PDN = “L”)
(Note 10)
80
200
μA
MS0287-E-03
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[AK4588]
Note 5. S/N measured by CCIR-ARM is 96dB(@fs=48kHz).
Note 6. PSR is applied to AVDD, DVDD, PVDD and TVDD with 1kHz, 50mVpp. VREFH pin is held a constant
voltage.
Note 7. S/N measured by CCIR-ARM is 102dB(@fs=48kHz).
Note 8. CL=20pF, X’tal=24.576MHz, CM1-0=“10”, CM1-0=“10”, OCKS1-0= [email protected], [email protected],
[email protected]
Note 9. TVDD=13mA(typ).
Note 10. In the power-down mode. RX inputs are open and all digital input pins including clock pins (MCLK, BICK,
LRCK) are held DVSS.
FILTER CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=4.5∼5.5V; TVDD=2.7∼5.5V; fs=48kHz)
Parameter
Symbol
min
ADC Digital Filter (Decimation LPF):
Passband
PB
0
±0.1dB
(Note 11)
-0.2dB
-3.0dB
Stopband
SB
28.0
Passband Ripple
PR
Stopband Attenuation
SA
68
Group Delay
(Note 12)
GD
Group Delay Distortion
ΔGD
ADC Digital Filter (HPF):
Frequency Response (Note 11)
-3dB
FR
-0.1dB
DAC Digital Filter:
Passband
(Note 11)
-0.1dB
PB
0
-6.0dB
Stopband
SB
26.2
Passband Ripple
PR
Stopband Attenuation
SA
54
Group Delay
(Note 12)
GD
DAC Digital Filter + Analog Filter:
FR
Frequency Response:
0 ∼ 20.0kHz
FR
40.0kHz (Note 13)
FR
80.0kHz (Note 13)
typ
max
Units
20.0
23.0
18.9
-
16
0
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
1.0
6.5
Hz
Hz
±0.04
19.2
kHz
kHz
kHz
dB
dB
1/fs
±0.2
±0.3
±1.0
dB
dB
dB
24.0
21.8
±0.02
Note 11. The passband and stopband frequencies scale with fs.
For example, 21.8kHz at –0.1dB is 0.454 x fs (DAC). The reference frequency of these responses is 1kHz.
Note 12. The calculating delay time which occurred by digital filtering. This time is from setting the input of analog
signal to setting the 24bit data of both channels to the output register for ADC.
For DAC, this time is from setting the 20/24bit data of both channels on input register to the output of analog
signal.
Note 13. [email protected]=96kHz, [email protected]=192kHz
MS0287-E-03
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[AK4588]
DC CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=PVDD=4.5∼5.5V; TVDD=2.7∼5.5V)
Parameter
Symbol
min
2.2
VIH
High-Level Input Voltage (Except XTI pin)
70%DVDD
VIH
(XTI pin)
VIL
Low-Level Input Voltage (Except XTI pin)
VIL
(XTI pin)
Input Voltage at AC Coupling (XTI pin) (Note 14)
VAC
40%DVDD
High-Level Output Voltage
TVDD-0.4
VOH
(Except TX0-1, DZF pins :
Iout=-400μA)
DVDD-0.4
VOH
(TX0-1 pin :
Iout=-400μA)
AVDD-0.4
VOH
(DZF pin :
Iout=-400μA)
VOL
Low-Level Output Voltage
(Iout=400μA)
Iin
Input Leakage Current
Note 14. In case of connecting capacitance to XTI pin.
typ
-
max
0.8
30%DVDD
-
Units
V
V
V
V
Vpp
-
0.4
±10
V
V
V
V
μA
max
Units
kΩ
mVpp
mV
kHz
S/PDIF RECEIVER CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=2.7~3.6V; TVDD=2.7~5.5V)
Parameter
Symbol
min
typ
Input Resistance
Zin
10
Input Voltage (internally biased at PVDD/2)
VTH
200
Input Hysteresis
VHY
50
Input Sample Frequency
fs
32
-
192
PVDD
RX pin
20k(typ)
20k(typ)
PVSS
VCOM
Internal biased pin Circuit
MS0287-E-03
2009/05
- 13 -
[AK4588]
SWITCHING CHARACTERISTICS (ADC/DAC part)
(Ta=25°C; AVDD=DVDD=PVDD=4.5∼5.5V; TVDD=2.7∼5.5V; CL=20pF)
Parameter
Symbol
min
typ
Master Clock Timing
Master Clock
256fsn, 128fsd:
fCLK
8.192
Pulse Width Low
tCLKL
27
Pulse Width High
tCLKH
27
384fsn, 192fsd:
fCLK
12.288
Pulse Width Low
tCLKL
20
Pulse Width High
tCLKH
20
512fsn, 256fsd:
fCLK
16.384
Pulse Width Low
tCLKL
15
Pulse Width High
tCLKH
15
LRCK1 Timing (Slave Mode)
Normal mode
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
Duty Cycle
TDM 256 mode
LRCK1 frequency
“H” time
“L” time
TDM 128 mode
LRCK1 frequency
“H” time
“L” time
LRCK1 Timing (Master Mode)
Normal mode
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
Duty Cycle
TDM 256 mode
LRCK1 frequency
“H” time
(Note 15)
TDM 128 mode
LRCK1 frequency
“H” time
(Note 15)
Power-down & Reset Timing
PDN Pulse Width
(Note 16)
PDN “↑” to SDTO1 valid
(Note 17)
max
Units
12.288
MHz
ns
ns
MHz
ns
ns
MHz
ns
ns
18.432
24.576
fsn
fsd
fsq
Duty
32
64
120
45
48
96
192
55
kHz
kHz
kHz
%
fsd
tLRH
tLRL
32
1/256fs
1/256fs
48
kHz
ns
ns
fsd
tLRH
tLRL
64
1/128fs
1/128fs
96
kHz
ns
ns
fsn
fsd
fsq
Duty
32
64
120
48
96
192
kHz
kHz
kHz
%
fsn
tLRH
32
48
kHz
ns
fsd
tLRH
64
96
1/4fs
kHz
ns
tPD
tPDV
150
522
ns
1/fs
50
1/8fs
Note 15. “L” time at I2S format.
Note 16. The AK4588 can be reset by bringing PDN “L” to “H” upon power-up.
Note 17. These cycles are the number of LRCK rising from PDN rising.
MS0287-E-03
2009/05
- 14 -
[AK4588]
Parameter
Audio Interface Timing (Slave Mode)
Normal mode
BICK1 Period
BICK1 Pulse Width Low
Pulse Width High
LRCK1 Edge to BICK1 “↑”
(Note 18)
BICK1 “↑” to LRCK1 Edge
(Note 18)
LRCK1 to SDTO1(MSB)
BICK1 “↓” to SDTO1
SDTI1-4,DAUX1 Hold Time
SDTI1-4,DAUX1 Setup Time
TDM 256 mode
BICK1 Period
BICK1 Pulse Width Low
Pulse Width High
LRCK1 Edge to BICK1 “↑”
(Note 18)
BICK1 “↑” to LRCK1 Edge
(Note 18)
BICK1 “↓” to SDTO1
SDTI1 Hold Time
SDTI1 Setup Time
TDM 128 mode
BICK1 Period
BICK1 Pulse Width Low
Pulse Width High
LRCK1 Edge to BICK1 “↑”
(Note 18)
BICK1 “↑” to LRCK1 Edge
(Note 18)
BICK1 “↓” to SDTO1
SDTI1-2 Hold Time
SDTI1-2 Setup Time
Audio Interface Timing (Master Mode)
Normal mode
BICK1 Frequency
BICK1 Duty
BICK1 “↓” to LRCK1 Edge
BICK1“↓” to SDTO1
SDTI1-4,DAUX1 Hold Time
SDTI1-4,DAUX1 setup Time
TDM 256 mode
BICK1 Frequency
BICK1 Duty
(Note 19)
BICK1 “↓” to LRCK1 Edge
BICK1 “↓” to SDTO1
SDTI1 Hold Time
SDTI1 Setup Time
TDM 128 mode
BICK1 Frequency
BICK1 Duty
(Note 20)
BICK1 “↓” to LRCK1 Edge
BICK1 “↓” to SDTO1
SDTI1-2 Hold Time
SDTI1-2 Setup Time
Symbol
min
tBCK
tBCKL
tBCKH
tLRB
tBLR
tLRS
tBSD
tSDH
tSDS
81
32
32
20
20
tBCK
tBCKL
tBCKH
tLRB
tBLR
tBSD
tSDH
tSDS
81
32
32
20
20
tBCK
tBCKL
tBCKH
tLRB
tBLR
tBSD
tSDH
tSDS
81
32
32
20
20
fBCK
dBCK
tMBLR
tBSD
tSDH
tSDS
fBCK
dBCK
tMBLR
tBSD
tSDH
tSDS
fBCK
dBCK
tMBLR
tBSD
tSDH
tSDS
typ
max
40
40
20
20
20
10
10
20
10
10
64fs
50
-20
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
20
40
12
20
Hz
%
ns
ns
ns
ns
12
20
Hz
%
ns
ns
ns
ns
256fs
50
10
10
128fs
50
-12
ns
ns
ns
ns
ns
ns
ns
ns
ns
Hz
%
ns
ns
ns
ns
20
20
-12
Units
10
10
Note 18. BICK1 rising edge must not occur at the same time as LRCK1 edge.
Note 19. When MCLK is 512fs, dBCK is guaranteed. When 384fs and 256fs, dBCK can not be guaranteed.
Note 20. When MCLK is 256fs, dBCK is guaranteed. When 128fs, dBCK can not be guaranteed.
MS0287-E-03
2009/05
- 15 -
[AK4588]
■ Timing Diagram(ADC/DAC part)
1/fCLK
VIH
MCLK
VIL
tCLKH
tCLKL
1/fsn, 1/fsd, 1/fsq
VIH
LRCK1
VIL
tBCK
VIH
BICK1
VIL
tBCKH
tBCKL
Clock Timing (Normal mode)
1/fCLK
VIH
MCLK
VIL
tCLKH
tCLKL
1/fs
VIH
LRCK1
VIL
tLRH
tLRL
tBCK
VIH
BICK1
VIL
tBCKH
tBCKL
Clock Timing (TDM 256 mode, TDM 128 mode)
MS0287-E-03
2009/05
- 16 -
[AK4588]
VIH
LRCK1
VIL
tBLR
tLRB
VIH
BICK1
VIL
tLRS
tBSD
50%TVDD
SDTO1
tSDS
tSDH
VIH
SDTI
VIL
Audio Interface Timing (Normal mode)
VIH
LRCK1
VIL
tBLR
tLRB
VIH
BICK1
VIL
tBSD
SDTO1
50%TVDD
tSDS
tSDH
VIH
SDTI
VIL
Audio Interface Timing (TDM 256 mode, TDM 128 mode)
MS0287-E-03
2009/05
- 17 -
[AK4588]
LRCK1
50%TVDD
tMBLR
50%TVDD
BICK1
tBSD
50%TVDD
SDTO1
tDXS
tDXH
VIH
DAUX1
VIL
Audio Interface timing (Master Mode)
MS0287-E-03
2009/05
- 18 -
[AK4588]
SWITCHING CHARACTERISTICS (DIR/DIT part)
(Ta=25°C; DVDD=AVDD4.5~5.5V, TVDD=2.7~5.5V; CL=20pF)
Parameter
Symbol
min
typ
Master Clock Timing
Crystal Resonator Frequency
fXTAL
11.2896
External Clock
Frequency
fECLK
11.2896
Duty
dECLK
40
50
MCKO1 Output
Frequency
fMCK1
4.096
Duty
dMCK1
40
50
MCKO2 Output
Frequency
fMCK2
2.048
Duty
dMCK2
40
50
PLL Clock Recover Frequency (RX0-7)
fpll
32
LRCK2 Frequency
fs
32
Duty Cycle
dLCK
45
Audio Interface Timing
Slave Mode
BICK2 Period
tBCK
80
BICK2 Pulse Width Low
tBCKL
30
Pulse Width High
tBCKH
30
tLRB
20
LRCK2 Edge to BICK2 “↑”
(Note 21)
tBLR
20
BICK2 “↑” to LRCK2 Edge
(Note 21)
tLRM
LRCK2 to SDTO2 (MSB)
tBSD
BICK2 “↓” to SDTO2
tDXH
20
DAUX2 Hold Time
tDXS
20
DAUX2 Setup Time
Master Mode
BICK2 Frequency
fBCK
64fs
BICK2 Duty
dBCK
50
tMBLR
-20
BICK2 “↓” to LRCK2
tBSD
BICK2 “↓” to SDTO2
tDXH
20
DAUX2 Hold Time
tDXS
20
DAUX2 Setup Time
Note 21. BICK2 rising edge must not occur at the same time as LRCK2 edge.
MS0287-E-03
max
Units
24.576
24.576
60
24.576
60
24.576
60
192
192
55
MHz
MHz
%
MHz
%
MHz
%
kHz
kHz
%
30
30
20
15
ns
ns
ns
ns
ns
ns
ns
ns
ns
Hz
%
ns
ns
ns
ns
2009/05
- 19 -
[AK4588]
■ Timing Diagram(DIR/DIT part)
1/fECLK
VIH
XTI
VIL
tECLKH
tECLKL
dECLK = tECLKH x fECLK x 100
= tECLKL x fECLK x 100
1/fMCK1
MCKO1
50%TVDD
tMCKH1
tMCKL1
dMCK1 = tMCKH1 x fMCK1 x 100
= tMCKL1 x fMCK1 x 100
1/fMCK2
MCKO2
50%TVDD
tMCKH2
tMCKL2
dMCK2 = tMCKH2 x fMCK2 x 100
= tMCKL2 x fMCK2 x 100
1/fs
VIH
LRCK2
VIL
tLRH
tLRL
dLCK = tLRH x fs x 100
= tLRL x fs x 100
VIH
LRCK2
VIL
tBCK
tBLR
tLRB
tBCKL
tBCKH
VIH
BICK2
VIL
tLRM
tBSD
50%TVDD
SDTO2
tDXS
tDXH
VIH
DAUX2
VIL
Serial Interface Timing (Slave Mode)
MS0287-E-03
2009/05
- 20 -
[AK4588]
LRCK2
50%TVDD
tMBLR
50%TVDD
BICK2
tBSD
50%TVDD
SDTO2
tDXS
tDXH
VIH
DAUX2
VIL
Serial Interface Timing (Master Mode)
tPD
PDN
VIL
Power Down & Reset Timing
MS0287-E-03
2009/05
- 21 -
[AK4588]
SWITCHING CHARACTERISTICS (ADC/DAC part and DIR/DIT part)
(Ta=25°C; AVDD=DVDD=PVDD=4.5∼5.5V; TVDD=2.7∼5.5V; CL=20pF)
Parameter
Symbol
min
typ
max
Control Interface Timing (4-wire serial mode)
CCLK Period
tCCK
200
CCLK Pulse Width Low
tCCKL
80
Pulse Width High
tCCKH
80
CDTI Setup Time
tCDS
50
CDTI Hold Time
tCDH
50
CSN “H” Time
tCSW
150
tCSS
50
CSN “↓” to CCLK “↑”
tCSH
50
CCLK “↑” to CSN “↑”
tDCD
45
CDTO Delay
tCCZ
70
CSN “↑” to CDTO Hi-Z
Control Interface Timing (I2C Bus mode)
SCL Clock Frequency
fSCL
100
Bus Free Time Between Transmissions
tBUF
4.7
Start Condition Hold Time (prior to first clock pulse)
tHD:STA
4.0
Clock Low Time
tLOW
4.7
Clock High Time
tHIGH
4.0
Setup Time for Repeated Start Condition
tSU:STA
4.7
SDA Hold Time from SCL Falling
(Note 22)
tHD:DAT
0
SDA Setup Time from SCL Rising
tSU:DAT
0.25
Rise Time of Both SDA and SCL Lines
tR
1.0
Fall Time of Both SDA and SCL Lines
tF
0.3
Setup Time for Stop Condition
tSU:STO
4.0
Capacitive load on bus
Cb
400
Pulse Width of Spike Noise Suppressed by Input Filter
tSP
0
50
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
kHz
μs
μs
μs
μs
μs
μs
μs
μs
μs
μs
pF
ns
Note 22. Data must be held for sufficient time to bridge the 300 ns transition time of SCL.
Note 23. I2C is a registered trademark of Philips Semiconductors.
MS0287-E-03
2009/05
- 22 -
[AK4588]
■ Timing Diagram (ADC/DAC part and DIR/DIT part)
VIH
CSN
VIL
tCSS
tCCK
tCCKL tCCKH
VIH
CCLK
VIL
tCDH
tCDS
C1
CDTI
C0
A4
R/W
VIH
VIL
Hi-Z
CDTO
WRITE/READ Command Input Timing in 4-wire serial mode
The ADC/DAC part doesn’t support READ command.
tCSW
VIH
CSN
VIL
tCSH
VIH
CCLK
CDTI
VIL
D3
D2
D1
VIH
D0
VIL
Hi-Z
CDTO
WRITE Data Input Timing in 4-wire serial mode
VIH
CSN
VIL
VIH
CCLK
VIL
CDTI
A1
VIH
A0
VIL
tDCD
CDTO
Hi-Z
D7
D6
D5
50%TVDD
READ Data Output Timing 1 in 4-wire serial mode
The ADC/DAC part doesn’t support READ command..
MS0287-E-03
2009/05
- 23 -
[AK4588]
tCSW
VIH
CSN
VIL
tCSH
VIH
CCLK
VIL
VIH
CDTI
VIL
tCCZ
CDTO
D3
D2
D1
50%TVDD
D0
READ Data Input Timing 2 in 4-wire serial mode
The ADC/DAC part doesn’t support READ command.
VIH
SDA
VIL
tLOW
tBUF
tR
tHIGH
tF
tSP
VIH
SCL
VIL
tHD:STA
Stop
Start
tHD:DAT
tSU:DAT
tSU:STA
tSU:STO
Start
Stop
I2C Bus mode Timing
The ADC/DAC part doesn’t support READ command.
tPD
VIH
PDN
VIL
tPDV
50%TVDD
SDTO
Power-down & Reset Timing
MS0287-E-03
2009/05
- 24 -
[AK4588]
OPERATION OVERVIEW (ADC/DAC part)
■ System Clock
The external clocks, which are required to operate the AK4588, are MCLK, LRCK1 and BICK1. MCLK should be
synchronized with LRCK1 but the phase is not critical. There are two methods to set MCLK frequency. In Manual
Setting Mode (ACKS bit = “0”: Default), the sampling speed is set by DFS1-0 bit (Table 1). The frequency of MCLK at
each sampling speed is set automatically. (Table 3, Table 4, Table 5) In Auto Setting Mode (ACKS bit = “1”), as MCLK
frequency is detected automatically (Table 6) and the internal master clock becomes the appropriate frequency (Table 7),
it is not necessary to set DFS1-0 bits.
Only MCLK is necessary in the master mode. Master Clock Input Frequency should be selected by CKS1-0 bits (Table
2), and Sampling Speed should be selected by DFS1-0 bits (Table 1). The frequencies and the duties of the clocks
(LRCK1, BICK1) may not be stabile after setting CKS1-0 bits and DFS1-0 bits up.
External clocks (MCLK, BICK1, LRCK1) should always be present whenever the AK4588 is in normal operation mode
(PDN pin = “H”). If these clocks are not provided, the AK4588 may draw excess current because the device utilizes
dynamic refreshed logic internally. If the external clocks are not present, the AK4588 should be in the power-down
mode (PDN pin = “L”) or in the reset mode (RSTN1 bit = “0”). After exiting reset at power-up etc., the AK4588 is in
the power-down mode until MCLK and LRCK are input.
In the Master mode, External clock(MCLK) should always be supplied except in the power-down mode. It is in
power-down mode until MCLK will be supplied, when Reset was canceled by Power-ON and so on.
DFS1
0
0
1
DFS0
0
1
0
Sampling Speed (fs)
Normal Speed Mode
32kHz~48kHz
Double Speed Mode
64kHz~96kHz
Quad Speed Mode
120kHz~192kHz
(default)
Table 1. Sampling Speed (Manual Setting Mode)
CKS1
0
0
1
1
CKS0
0
1
0
1
Normal
256fs
384fs
512fs
256fs
Double
128fs
192fs
256fs
256fs
Quad
128fs
128fs
128fs
128fs
(default)
Table 2.Master clock input select (Master Mode)
LRCK1
Fs
32.0kHz
44.1kHz
48.0kHz
256fs
8.1920
11.2896
12.2880
MCLK (MHz)
384fs
12.2880
16.9344
18.4320
512fs
16.3840
22.5792
24.5760
BICK1 (MHz)
64fs
2.0480
2.8224
3.0720
Table 3. System Clock Example (Normal Speed Mode @Manual Setting Mode)
LRCK1
Fs
88.2kHz
96.0kHz
128fs
11.2896
12.2880
MCLK (MHz)
192fs
16.9344
18.4320
256fs
22.5792
24.5760
BICK1 (MHz)
64fs
5.6448
6.1440
Table 4. System Clock Example (Double Speed Mode @Manual Setting Mode)
(Note: At Double speed mode (DFS1= “0”, DFS0 = “1”), 128fs and 192fs are not available for ADC.)
MS0287-E-03
2009/05
- 25 -
[AK4588]
LRCK1
Fs
176.4kHz
192.0kHz
MCLK (MHz)
192fs
-
128fs
22.5792
24.5760
256fs
-
BICK1 (MHz)
64fs
11.2896
12.2880
Table 5. System Clock Example (Quad Speed Mode @Manual Setting Mode)
(Note: At Quad speed mode (DFS1= “1”, DFS0 = “0”) are not available for ADC.)
MCLK
512fs
256fs
128fs
Sampling Speed
Normal
Double
Quad
Table 6. Sampling Speed (Auto Setting Mode)
LRCK1
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
128fs
22.5792
24.5760
MCLK (MHz)
256fs
22.5792
24.5760
-
512fs
16.3840
22.5792
24.5760
-
Sampling
Speed
Normal
Double
Quad
Table 7. System Clock Example (Auto Setting Mode)
■ De-emphasis Filter
The AK4588 includes the digital de-emphasis filter (tc=50/15μs) by IIR filter. De-emphasis filter is not available in
Double Speed Mode and Quad Speed Mode. This filter corresponds to three sampling frequencies (32kHz, 44.1kHz,
48kHz). De-emphasis of each DAC can be set individually by register data of DEMA1-C0 bits (DAC1: DEMA1-0 bits,
DAC2: DEMB1-0 bits, DAC3: DEMC1-0 bits, DAC4: DEMD1-0 bits, see “Register Definitions”).
Mode
0
1
2
3
Sampling Speed
Normal Speed
Normal Speed
Normal Speed
Normal Speed
DEM1
0
0
1
1
DEM0
0
1
0
1
DEM
44.1kHz
OFF
48kHz
32kHz
(default)
Table 8. De-emphasis control
■ Digital High Pass Filter
The ADC has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is 1.0Hz at fs=48kHz and
scales with sampling rate (fs).
MS0287-E-03
2009/05
- 26 -
[AK4588]
■ Master mode and Slave mode
Master Mode can be selected by setting the MASTER pin to “H”. LRCK1 and BICK1 will be outputs in Master Mode.
And, Slave Mode can be selected by setting this pin to “L”. LRCK1 and BICK1 will be inputs in Slave Mode.
Operation of LRCK1 and BICK1 is shown below Table 9.
PDN pin
PWADN bit, PWDAN bit
MASTER pin LRCK1 pin
L
Input
-H
“L” output
L
Input
“00”
H
“L” output
L
Input
Except for “00”
H
Output
Table 9. Operation of LRCK1 and BICK1
L
H
H
BICK1 pin
Input
“L” output
Input
“L” output
Input
Output
■ Audio Serial Interface Format
When TDM1-0 bit = “00”, 8 modes can be selected by the DIF1-0 bits as shown in Table 10. In all modes the serial
data is MSB-first, 2’s complement format. The SDTO1 is clocked out on the falling edge of BICK1 and the
SDTI/DAUX1 are latched on the rising edge of BICK1. Figure 1∼Figure 4 shows the timing at SDOS bit = “0”. In this
case, the SDTO1 outputs the ADC output data. When SDOS bits = “1”, the data input to DAUX1 is converted to
SDTO1’s format and output from SDTO1. Mode 2/3/6/7/10/11/14/15/18/19/22/23 in SDTI input formats can be used
for 16-20bit data by zeroing the unused LSBs.
Mode
MASTER
TDM 1
TDM0
DIF1
DIF0
0
0
0
0
0
0
1
0
0
0
0
1
2
0
0
0
1
0
3
0
0
0
1
1
4
1
0
0
0
0
5
1
0
0
0
1
6
1
0
0
1
0
7
1
0
0
1
1
SDTO1
SDTI1-4,
DAUX1
24bit, Left
justified
24bit, Left
justified
24bit, Left
justified
24bit, I2S
24bit, Left
justified
24bit, Left
justified
24bit, Left
justified
24bit, I2S
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I2S
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I2S
LRCK1
I/O
BICK1
I/O
H/L
I
≥ 48fs
I
H/L
I
≥ 48fs
I
H/L
I
≥ 48fs
I
L/H
I
≥ 48fs
I
H/L
O
64fs
O
H/L
O
64fs
O
H/L
O
64fs
O
L/H
O
64fs
O
(default)
Table 10. Audio data formats (Normal mode)
The audio serial interface format becomes the TDM 256 mode if TDM1-0 bits are set to “01”. In the TDM 256 Mode,
the serial data of all DAC (eight channels) is input to the SDTI1 pin. The input data to SDTI2-4 pins is ignored. BICK1
should be fixed to 256fs. “H” time and “L” time of LRCK1 pin should be 1/256fs at least. Eight modes can be selected
by the DIF1-0 bits was shown in Table 11. In all modes the serial data is MSB-first, 2’s complement format. The
SDTO1 pin is clocked out on the falling edge of BICK1 pin and the SDTI1 pin are latched on the rising edge of BICK1
pin. SDOS bit and LOOP1-0 bits should be set to “0” in the TDM mode. TDM 128 Mode can be set by TDM1-0 bit =
“10”. In this Mode, the serial data of DAC (four channels; L1, R1, L2, R2) is input to the SDTI1 pin. Other four data
(L3, R3, L4, R4) are input to the SDTI2 pin.
MS0287-E-03
2009/05
- 27 -
[AK4588]
Mode
MASTER
TDM 1
TDM0
DIF1
DIF0
8
0
0
1
0
0
9
0
0
1
0
1
10
0
0
1
1
0
11
0
0
1
1
1
12
1
0
1
0
0
13
1
0
1
0
1
14
1
0
1
1
0
15
1
0
1
1
1
SDTO1
SDTI1
24bit, Left
justified
24bit, Left
justified
24bit, Left
justified
24bit, I2S
24bit, Left
justified
24bit, Left
justified
24bit, Left
justified
24bit, I2S
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I2S
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I2S
LRCK1
I/O
BICK1
I/O
↑
I
256fs
I
↑
I
256fs
I
↑
I
256fs
I
↓
I
256fs
I
↑
O
256fs
O
↑
O
256fs
O
↑
O
256fs
O
↓
O
256fs
O
Table 11. Audio data formats (TDM 256 mode)
Mode
MASTER
TDM 1
TDM
0
DIF1
DIF0
16
0
1
1
0
0
17
0
1
1
0
1
18
0
1
1
1
0
19
0
1
1
1
1
20
1
1
1
0
0
21
1
1
1
0
1
22
1
1
1
1
0
23
1
1
1
1
1
SDTO1
SDTI1,
SDTI2
24bit, Left
justified
24bit, Left
justified
24bit, Left
justified
24bit, I2S
24bit, Left
justified
24bit, Left
justified
24bit, Left
justified
24bit, I2S
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I2S
20bit, Right
justified
24bit, Right
justified
24bit, Left
justified
24bit, I2S
LRCK1
I/O
BICK1
I/O
↑
I
128fs
I
↑
I
128fs
I
↑
I
128fs
I
↓
I
128fs
I
↑
O
128fs
O
↑
O
128fs
O
↑
O
128fs
O
↓
O
128fs
O
Table 12. Audio data formats (TDM 128 mode)
MS0287-E-03
2009/05
- 28 -
[AK4588]
LRCK1
0
1
2
12
13
14
24
25
31
0
1
2
12
13
14
24
25
31
0
1
BICK1(64fs)
SDTO1(o)
23 22
SDTI(i)
12 11 10
0
19 18
8
Don’t Care
23 22
7
1
12
11 10
Don’t Care
0
0
19 18
SDTO-23:MSB, 0:LSB; SDTI-19:MSB, 0:LSB
Lch Data
23
8
7
1
0
Rch Data
Figure 1. Mode 0/4 Timing
LRCK1
0
1
2
8
9
10
24
25
31
0
1
2
8
9
10
24
25
31
0
1
BICK1(64fs)
SDTO1(o)
23 22
SDTI(i)
16 15 14
Don’t Care
0
23 22
23:MSB, 0:LSB
23 22
8
7
1
16 15 14
Don’t Care
0
0
23 22
Lch Data
23
8
7
1
0
Rch Data
Figure 2. Mode 1/5 Timing
LRCK1
0
1
2
21
22
23
24
28
29
30
31
0
1
2
22
23
24
28
29
30
31
0
1
BICK1(64fs)
SDTO1(o)
23 22
2
1
0
SDTI(i)
23 22
2
1
0
23:MSB, 0:LSB
Don’t Care
23 22
2
1
0
23 22
2
1
0
Lch Data
23
Don’t Care
23
Rch Data
Figure 3.Mode 2/6 Timing
LRCK1
0
1
2
3
22
23
24
25
29
30
31
0
1
2
3
22
23
24
25
29
30
31
0
1
BICK1(64fs)
SDTO1(o)
23 22
2
1
0
SDTI(i)
23 22
2
1
0
23:MSB, 0:LSB
Don’t Care
23 22
2
1
0
23 22
2
1
0
Lch Data
Don’t Care
Rch Data
Figure 4. Mode 3/7 Timing
MS0287-E-03
2009/05
- 29 -
[AK4588]
256 B ICK
LRCK1
(m ode 8)
LRCK1
(m ode 12)
BICK1(256fs)
SDTO1(o)
23 22
0
23 22
Lch
32 B ICK
SDTI1(i)
0
23 22
Rch
19 18
32 B ICK
0
19 18
0
19 18
0
19 18
0
19 18
0
19 18
0
19 18
0
19 18
0
L1
R1
L2
R2
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
19
Figure 5. Mode 8/12 Timing
256 B ICK
LRCK1
(m ode 9)
LRCK1
(m ode 13)
BICK1(256fs)
SDTO1(o)
SDTI1(i)
23 22
0
23 22
0
Lch
Rch
32 B ICK
32 B ICK
23 22
0
23 22
23 22
0
L1
R1
32 B ICK
32 B ICK
23 22
0
23 22
0
23 22
0
23 22
0
23 22
0
23 22
0
L2
R2
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
23
Figure 6. Mode 9/13 Timing
256 B ICK
LRCK1
(m ode 10)
LRCK1
(m ode 14)
BICK1(256fs)
SDTO1(o)
23 22
0
Lch
SDTI1(i)
0
23 22
Rch
32 B ICK
23 22
23 22
0
32 B ICK
23 22
0
23 22
0
23 22
0
23 22
0
23 22
0
23 22
0
23 22
0
L1
R1
L2
R2
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
23 22
Figure 7. Mode 10/14 Timing
256 B ICK
LRCK1
(m ode 11)
LRCK1
(m ode 15)
BICK1(256fs)
SDTO1(o)
23
0
Lch
23
0
23
Rch
32 B ICK
SDTI1(i)
23
0
32 B ICK
23
0
23
0
23
0
23
0
23
0
23
0
23
0
L1
R1
L2
R2
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
32 B ICK
23
Figure 8. Mode 11/15 Timing
MS0287-E-03
2009/05
- 30 -
[AK4588]
128 B ICK
LRCK1
(m ode 16)
LRCK1
(m ode 20)
BICK1(128fs)
SDTO1(o)
23 22
0
SDTI2(i)
23 22
Rch
32 B ICK
SDTI1(i)
0
23 22
Lch
32 BICK
19 18
0
19 18
0
19 18
0
L1
R1
L2
32 B ICK
32 B ICK
32 B ICK
19 18
0
19 18
0
19 18
0
19 18
R2
32 B ICK
19 18
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
0
19
0
19
Figure 9. Mode 16/20 Timing
128 B ICK
LRCK1
(m ode 17)
LRCK1
(m ode 21)
BICK1(128fs)
23 22
0
SDTI2(i)
23 22
Rch
32 B ICK
SDTI1(i)
0
23 22
Lch
32 BICK
23 22
0
23 22
0
23 22
0
L1
R1
L2
32 B ICK
32 B ICK
32 B ICK
23 22
0
23 22
0
23 22
0
23 22
R2
32 B ICK
23 22
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
0
19
0
19
Figure 10. Mode 17/21 Timing
128 B ICK
LRCK1
(m ode 18)
LRCK1
(m ode 22)
BICK1(128fs)
SDTO1(o)
23 22
0
SDTI1(i)
SDTI2(i)
23 22
Rch
32 B ICK
23 22
0
23 22
Lch
32 BICK
0
23 22
0
23 22
0
23 22
L1
R1
L2
R2
32 B ICK
32 B ICK
32 B ICK
32 B ICK
23 22
0
23 22
0
23 22
0
23 22
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
0
23 22
0
23 22
Figure 11. Mode 18/22 Timing
MS0287-E-03
2009/05
- 31 -
[AK4588]
128 B ICK
LRCK1
(m ode 19)
LRCK1
(m ode 23)
BICK1(128fs)
SDTO1(o)
23 22
0
SDTI1(i)
SDTI2(i)
23
Rch
32 B ICK
23 22
0
23 22
Lch
32 BICK
0
23 22
0
0
23 22
23 22
L1
R1
L2
R2
32 B ICK
32 B ICK
32 B ICK
32 B ICK
23 22
0
23 22
0
0
23 22
23 22
L3
R3
L4
R4
32 B ICK
32 B ICK
32 B ICK
32 B ICK
0
23
0
23
Figure 12. Mode 19/23 Timing
MS0287-E-03
2009/05
- 32 -
[AK4588]
■ Overflow Detection
The AK4588 has overflow detect function for the analog input. Overflow detect function is enable if OVFE bit is set to
“1”. The OVF pin goes to “H” if analog input of Lch or Rch overflows (more than -0.3dBFS). OVF output for
overflowed analog input has the same group delay as ADC (GD = 19.1/fs = 398μs @fs=48kHz). The OVF pin is “L”
for 522/fs (=11.8ms @fs=48kHz) after PDN = “↑”, and then overflow detection is enabled.
■ Zero Detection
The AK4588 has two pins for zero detect flag outputs. Channel grouping can be selected by DZFM3-0 bits (Table 13).
The DZF1 pin corresponds to the group 1 channels and the DZF2 pin corresponds to the group 2 channels. However the
DZF2 pin becomes the OVF pin if OVFE bit is set to “1”. Zero detection mode is set to mode 0. DZF1 is AND of all
eight channels and DZF2 is disabled (“L”) at mode 0. Table 14 shows the relation of OVFE bit and DZF.
When the input data of all channels in the group 1(group 2) are continuously zeros for 8192 LRCK1 cycles, DZF1
(DZF2) pin goes to “H”. DZF1 (DZF2) pin immediately returns to “L” if input data of any channels in the group 1
(group 2) is not zero after going DZF1 (DZF2) “H”.
Mode
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
DZFM
2 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
L1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF2
R1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF2
DZF2
DZF1
DZF1
DZF1
DZF1
AOUT
L2
R2
L3
R3
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF2
DZF1
DZF1
DZF2
DZF2
DZF1
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
disable (DZF1=DZF2 = “L”)
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
L4
DZF1
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
R4
DZF1
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
DZF1
DZF2
DZF2
DZF2
(default)
disable (DZF1=DZF2 = “L”)
Table 13. Zero detect control
OVFE bit
0
1
DZF1 pin
DZF2/OVF pin
Selectable (Table 13) Selectable (Table 13)
Selectable (Table 13)
OVF output
Table 14. DZF1-2 pins outputs
MS0287-E-03
2009/05
- 33 -
[AK4588]
■ Digital Attenuator
The AK4588 has channel-independent digital attenuator (128 levels, 0.5dB step). Attenuation level of each channel can
be set by each ATT7-0 bits (Table 15).
ATT7-0
00H
01H
02H
:
7DH
7EH
7FH
FEH
FFH
Attenuation Level
0dB
-0.5dB
-1.0dB
:
-62.5dB
-63dB
MUTE (-∞)
:
MUTE (-∞)
MUTE (-∞)
(default)
Table 15. Attenuation level of digital attenuator
Transition time between set values of ATT7-0 bits can be selected by ATS1-0 bits (Table 16). Transition between set
values is the soft transition. Therefore, the switching noise does not occur in the transition.
Mode
0
1
2
3
ATS1
0
0
1
1
ATS0
0
1
0
1
ATT speed
1792/fs
896/fs
256/fs
256/fs
(default)
Table 16. Transition time between set values of ATT7-0 bits
The transition between set values is soft transition of 1792 levels in mode 0. It takes 1792/fs ([email protected]=48kHz) from
00H(0dB) to 7FH(MUTE) in mode 0. If the PDN pin goes to “L”, the ATTs are initialized to 00H. The ATTs are 00H
when RSTN bit = “0”. When RSTN bit return to “1”, the ATTs fade to their current value.
MS0287-E-03
2009/05
- 34 -
[AK4588]
■ Soft mute operation
Soft mute operation is performed at digital domain. When the SMUTE bit goes to “1”, the output signal is attenuated by
-∞ during ATT_DATA×ATT transition time (Table 16) from the current ATT level. When the SMUTE bit is returned
to “0”, the mute is cancelled and the output attenuation gradually changes to the ATT level during ATT_DATA×ATT
transition time. If the soft mute is cancelled before attenuating to -∞ after starting the operation, the attenuation is
discontinued and returned to ATT level by the same cycle. The soft mute is effective for changing the signal source
without stopping the signal transmission.
SMUTE bit
ATT Level
(1)
(1)
(3)
Attenuation
-∞
GD
(2)
GD
AOUT
DZF1,2
(4)
8192/fs
Notes:
(1) ATT_DATA×ATT transition time (Table 16). For example, in Normal Speed Mode, this time is 1792LRCK1
cycles (1792/fs) at ATT_DATA=00H. ATT transition of the soft-mute is from 00H to 7FH
(2) The analog output corresponding to the digital input has a group delay, GD.
(3) If the soft mute is cancelled before attenuating to -∞ after starting the operation, the attenuation is discontinued
and returned to ATT level by the same cycle.
(4) When the input data at all the channels of the group are continuously zeros for 8192 LRCK1 cycles, the DZF pin
of each channel goes to “H”. the DZF pin immediately goes to “L” if the input data of either channel of the group
are not zero after going DZF “H”.
Figure 13. Soft mute and zero detection
■ System Reset
The AK4588 should be reset once by bringing the PDN pin = “L” upon power-up. The AK4588 is powered up and the
internal timing starts clocking by LRCK1 “↑” after exiting reset and power down state by MCLK. The AK4588 is in the
power-down mode until MCLK and LRCK1 are input.
MS0287-E-03
2009/05
- 35 -
[AK4588]
■ Power ON/OFF Sequence
The ADC and DACs of the AK4588 are placed in the power-down mode by bringing the PDN pin “L” and both digital
filters are reset at the same time. PDN pin “L” also reset the control registers to their default values. In the power-down
mode, the analog outputs go to VCOM voltage and DZF1-2 pins go to “L”. This reset should always be executed after
power-up. In case of the ADC, an analog initialization cycle starts after exiting the power-down mode. Therefore, the
output data, SDTO1 becomes available after 522 cycles of LRCK1 clock. In case of the DAC, an analog initialization
cycle starts after exiting the power-down mode. The analog outputs are VCOM voltage during the initialization. Figure
14 shows the sequences of the power-down and the power-up.
The ADC and all DACs can be powered-down individually by PWADN and PWDAN bits. And DAC1-4 can be
power-down individually by PD1-4 bits. In this case, the internal register values are not initialized. When PWADN bit
= “0”, the SDTO1 pin goes to “L”. When PWDAN bit = “0” and PD1-4 bits = “0”, the analog outputs go to VCOM
voltage and DZF1-2 pins go to “H”. Because some click noise occurs, the analog output should muted externally if the
click noise influences system application.
Power
PDN
522/fs
ADC Internal
State
(1)
Init Cycle
516/fs
DAC Internal
State
Normal Operation
Power-down
Normal Operation
Power-down
(2)
Init Cycle
GD (3)
GD
ADC In
(Analog)
ADC Out
(Digital)
“0”data (4)
DAC In
(Digital)
“0”data
(5)
“0”data
“0”data
GD
(3)
GD
(6)
DAC Out
(Analog)
(6)
(7)
Clock In
Don’t care
Don’t care
MCLK,LRCK,SCLK
10∼11/fs (10)
(8)
DZF1/DZF2
External
Mute
(9)
Mute ON
Mute ON
Notes:
(1) The analog part of ADC is initialized after exiting the power-down state.
(2) The analog part of DAC is initialized after exiting the power-down state.
(3) Digital output corresponding to analog input and analog output corresponding to digital input have the group
delay (GD).
(4) ADC output is “0” data at the power-down state.
(5) Click noise occurs at the end of initialization of the analog part. Please mute the digital output externally if the
click noise influences system application.
(6) Click noise occurs at the falling edge of PDN and at 512/fs after the rising edge of PDN.
(7) When the external clocks (MCLK, BICK1 and LRCK1) are stopped, the AK4588 should be in the power-down
mode.
(8) DZF1-2 pins are “L” in the power-down mode (PDN pin = “L”).
(9) Please mute the analog output externally if the click noise (6) influences system application.
(10) DZF= “L” for 10∼11/fs after PDN= “↑”.
Figure 14. Power-down/up sequence example
MS0287-E-03
2009/05
- 36 -
[AK4588]
■ Reset Function
When RSTN1 bit = “0”, ADC and DACs are powered-down but the internal register are not initialized. The analog
outputs go to VCOM voltage, DZF1-2 pins go to “H” and the SDTO1 pin goes to “L”. Because some click noise
occurs, the analog output should muted externally if the click noise influences system application. Figure 15 shows the
power-up sequence.
RSTN bit
4~5/fs (9)
1~2/fs (9)
Internal
RSTN bit
516/fs (1)
ADC Internal
State
Normal Operation
Digital Block Power-down
DAC Internal
State
Normal Operation
Digital Block Power-down
Normal Operation
Init Cycle
Normal Operation
GD (2)
GD
ADC In
(Analog)
(3)
ADC Out
(Digital)
DAC In
(Digital)
(4)
“0”data
“0”data
(2)
GD
DAC Out
(Analog)
GD
(6)
(6)
(5)
(7)
Clock In
MCLK,LRCK,SCLK
Don’t care
4∼5/fs (8)
DZF1/DZF2
Notes:
(1) The analog part of ADC is initialized after exiting the reset state.
(2) Digital output corresponding to analog input and analog output corresponding to digital input have the group
delay (GD).
(3) ADC output is “0” data at the power-down state.
(4) Click noise occurs when the internal RSTN bit becomes “1”. Please mute the digital output externally if the click
noise influences system application.
(5) When RSTN1 bit = “0”, the analog outputs go to VCOM voltage.
(6) Click noise occurs at 4∼5/fs after RSTN1 bit becomes “0”, and occurs at 1∼2/fs after RSTN1 bit becomes “1”.
This noise is output even if “0” data is input.
(7) The external clocks (MCLK, BICK1 and LRCK1) can be stopped in the reset mode. When exiting the reset
mode, “1” should be written to RSTN1 bit after the external clocks (MCLK, BICK1 and LRCK1) are fed.
(8) DZF pins go to “H” when the RSTN1 bit becomes “0”, and go to “L” at 6~7/fs after RSTN1 bit becomes “1”.
(9) There is a delay, 4~5/fs from RSTN1 bit “0” to the internal RSTN bit “0”.
Figure 15. Reset sequence example
MS0287-E-03
2009/05
- 37 -
[AK4588]
■ DAC partial Power-Down Function
All DACs of The AK4588 can be powered-down individually by PD1-4 bits. The analog part of DAC is in power-down
by PD1-4 bits = “1”, however, the digital part is not powered-down by it. Even if all DACs were set in power-down by
the partial power-down bits, the digital part operation is continued. The analog output of the channel which is set in
power-down by PD1-4 bits is fixed to VCOM voltage. And though DZF detection is being done, the result of DZF
detection stops reflecting to DZF1-2 pins. Because some click noise occurs in both set-up and release of power-down,
either the analog output should be muted externally or PD1-4 bits should be set up when it is in PWDAN bit = “0” or
RSTN bit = “0”, if the click noise influences system application. Figure 16 shows the sequence of the power-down and
the power-up by PD1-4 bits.
PD1-4 bit
Power Down Channel
DAC Digital
Internal State
DAC Analog
Internal State
Normal Operation
Normal Operation
Normal Operation
Power-down
DAC In
(Digital)
Normal
Operation
Normal
Operation
Power-down
“0”data
(1)
GD
GD
(3)
DAC Out
(Analog)
(2)
(3)
(3)
(2)
(3)
8192/fs
DZF Detect
Internal State
(4)
(4)
Normal Operation Channel
DAC In
(Digital)
“0”data
GD
GD
DAC Out
(Analog)
8192/fs
DZF Detect
Internal State
Clock In
MCLK,LRCK,SCLK
(5)
(6)
DZF1/DZF2
Notes:
(1) Digital output corresponding to analog input and analog output corresponding to digital input have group delay
(GD).
(2) Analog output of the DAC powered down by PD1-4 bits = “1” is fixed to the voltage of VCOM.
(3) Immediately after PD1-4 bits are changed, some click noise occurs at the output of the channel changed by the
own PD bits.
(4) Though DZF detection is being done at a certain channel which set up PD1-4 bits = “1”, the result of DZF
detection stops reflecting to DZF1-2 pins.
(5) DZF detection of the DAC which is powered-down is ignored, and DZF1-2 pins go to “H”.
(6) When the power-down function is set up and the channel has input signal, even if the partial power-down
function is set up, DZF1-2 pins will not be “H”.
Figure 16. DAC partial power-down example
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[AK4588]
■ Register Map
Addr
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
0CH
Register Name
Control 1
Control 2
LOUT1 Volume Control
ROUT1 Volume Control
LOUT2 Volume Control
ROUT2 Volume Control
LOUT3 Volume Control
ROUT3 Volume Control
De-emphasis
ATT speed
& Power Down Control
Zero detect
LOUT4 Volume Control
ROUT4 Volume Control
D7
0
CKS1
ATT7
ATT7
ATT7
ATT7
ATT7
ATT7
DEMD1
D6
0
DFS1
ATT6
ATT6
ATT6
ATT6
ATT6
ATT6
DEMD0
D5
TDM1
LOOP1
ATT5
ATT5
ATT5
ATT5
ATT5
ATT5
DEMA1
D4
TDM0
LOOP0
ATT4
ATT4
ATT4
ATT4
ATT4
ATT4
DEMA0
D3
DIF1
SDOS
ATT3
ATT3
ATT3
ATT3
ATT3
ATT3
DEMB1
D2
DIF0
DFS0
ATT2
ATT2
ATT2
ATT2
ATT2
ATT2
DEMB0
D1
0
ACKS
ATT1
ATT1
ATT1
ATT1
ATT1
ATT1
DEMC1
D0
SMUTE
CKS0
ATT0
ATT0
ATT0
ATT0
ATT0
ATT0
DEMC0
0
PD4
ATS1
ATS0
PD3
PD2
PD1
RSTN1
OVFE
ATT7
ATT7
DZFM3
ATT6
ATT6
DZFM2
ATT5
ATT5
DZFM1
ATT4
ATT4
DZFM0
ATT3
ATT3
PWVRN
ATT2
ATT2
PWADN
ATT1
ATT1
PWDAN
ATT0
ATT0
Note: For addresses from 0DH to 1FH, data is not written.
When the PDN pin goes to “L”, the registers are initialized to their default values.
When RSTN1 bit set to “0”, the internal timing is reset and the DZF1-2 pins go to “H”, but registers are not
initialized to their default values.
■ Register Definitions
Addr
00H
Register Name
Control 1
Default
D7
0
0
D6
0
0
D5
TDM1
0
D4
TDM0
0
D3
DIF1
1
D2
DIF0
0
D1
0
0
D0
SMUTE
0
SMUTE: Soft Mute Enable
0: Normal operation
1: All DAC outputs soft-muted
DIF1-0: Audio Data Interface Modes (Table 10)
Initial: “10”, mode 2
TDM1-0: TDM Format Select (Table 11, Table 12)
Mode
0
1
2
TDM1 TDM0
0
0
0
1
1
1
SDTI
1-4
1
1-2
Sampling Speed
Normal, Double, Four Times Speed
Normal Speed
Double Speed
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[AK4588]
Addr
01H
Register Name
Control 2
Default
D7
CKS1
0
D6
DFS1
0
D5
LOOP1
0
D4
LOOP0
0
D3
SDOS
0
D2
DFS0
0
D1
ACKS
0
D0
CKS0
0
ACKS: Master Clock Frequency Auto Setting Mode Enable
0: Disable, Manual Setting Mode
1: Enable, Auto Setting Mode
Master clock frequency is detected automatically at ACKS bit “1”. In this case, the setting of DFS1-0
bits are ignored. When this bit is “0”, DFS1-0 bits set the sampling speed mode.
DFS1-0: Sampling speed mode (Table 1.)
The setting of DFS1-0 bits are ignored at ACKS bit “1”.
CKS0-1: Master clock frequency select (Table 2)
SDOS: SDTO1 source select
0: ADC
1: DAUX
SDOS bit should be set to “0” at TDM bit “1”.
In case of PWADN bit = “0” and PWDAN bit = “0”, the setting of SDOS bit becomes invalid. And
ADC is selected.
The output of SDTO1 becomes “L” at PWADN bit = “0”.
LOOP1-0: Loopback mode enable
00: Normal (No loop back)
01: LIN → LOUT1, LOUT2, LOUT3, LOUT4
RIN → ROUT1, ROUT2, ROUT3, ROUT4
The digital ADC output (DAUX1 input if SDOS = “1”) is connected to the digital DAC input. In
this mode, the input DAC data to SDTI1-3 is ignored. The audio format of SDTO1 at loopback
mode becomes mode 2 at mode 0, and mode 3 at mode 1, respectively.
10: SDTI1(L) → SDTI2(L), SDTI3(L), SDTI4(L)
SDTI1I → SDTI2I, SDTI3I, SDTI4I
In this mode the input DAC data to SDTI2-4 is ignored.
11: N/A
LOOP1-0 bits should be set to “00” at TDM bit “1”.
In case of PWADN bit = “0” and PWDAN bit = “0”, the setting of LOOP1-0 bits become invalid.
And ADC is selected. And it becomes the normal operation (No loop back).
MS0287-E-03
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[AK4588]
Addr
02H
03H
04H
05H
06H
07H
0BH
0CH
Register Name
LOUT1 Volume Control
ROUT1 Volume Control
LOUT2 Volume Control
ROUT2 Volume Control
LOUT3 Volume Control
ROUT3 Volume Control
LOUT4 Volume Control
ROUT4 Volume Control
Default
D7
ATT7
ATT7
ATT7
ATT7
ATT7
ATT7
ATT7
ATT7
0
D6
ATT6
ATT6
ATT6
ATT6
ATT6
ATT6
ATT6
ATT6
0
D5
ATT5
ATT5
ATT5
ATT5
ATT5
ATT5
ATT5
ATT5
0
D4
ATT4
ATT4
ATT4
ATT4
ATT4
ATT4
ATT4
ATT4
0
D3
ATT3
ATT3
ATT3
ATT3
ATT3
ATT3
ATT3
ATT3
0
D2
ATT2
ATT2
ATT2
ATT2
ATT2
ATT2
ATT2
ATT2
0
D1
ATT1
ATT1
ATT1
ATT1
ATT1
ATT1
ATT1
ATT1
0
D0
ATT0
ATT0
ATT0
ATT0
ATT0
ATT0
ATT0
ATT0
0
ATT7-0: Attenuation Level (Table 15)
Addr
08H
Register Name
De-emphasis
Default
D7
DEMD1
0
D6
DEMD0
1
D5
DEMA1
0
D4
DEMA0
1
D3
DEMB1
0
D2
DEMB0
1
D1
DEMC1
0
D0
DEMC0
1
DEMA1-0: De-emphasis response control for DAC1 data on SDTI1 (Table 8)
Initial: “01”, OFF
DEMB1-0: De-emphasis response control for DAC2 data on SDTI2 (Table 8)
Initial: “01”, OFF
DEMC1-0: De-emphasis response control for DAC3 data on SDTI3 (Table 8)
Initial: “01”, OFF
DEMD1-0: De-emphasis response control for DAC4 data on SDTI4 (Table 8)
Initial: “01”, OFF
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[AK4588]
Addr
09H
Register Name
ATT speed
& Power Down Control
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
PD4
ATS1
ATS0
PD3
PD2
PD1
RSTN1
0
0
0
0
0
0
0
1
RSTN1: Internal timing reset
0: Reset. DZF1-2 pins go to “H”, but registers are not initialized.
1: Normal operation
ATS1-0: Digital attenuator transition time setting (Table 16)
Initial: “00”, mode 0
PD1-0: Power-down control (0: Power-up, 1: Power-down)
PD1: Power down control of DAC1
PD2: Power down control of DAC2
PD3: Power down control of DAC3
PD4: Power down control of DAC4
Addr
0AH
Register Name
Zero detect
Default
D7
OVFE
0
D6
DZFM3
0
D5
DZFM2
1
D4
DZFM1
1
D3
DZFM0
1
D2
PWVRN
1
D1
PWADN
1
D0
PWDAN
1
PWDAN: Power-down control of DAC1-4
0: Power-down
1: Normal operation
PWADN: Power-down control of ADC
0: Power-down
1: Normal operation
PWVRN: Power-down control of reference voltage
0: Power-down
1: Normal operation
DZFM3-0: Zero detect mode select (Table 13)
Initial: “0111”, disable
OVFE: Overflow detection enable
0: Disable, pin#33 becomes DZF2 pin.
1: Enable, pin#33 becomes OVF pin.
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[AK4588]
OPERATION OVERVIEW (DIR/DIT part)
■ Non-PCM (AC-3, MPEG, etc.) and DTS-CD Bitstream Detection
The AK4588 has a Non-PCM steam auto-detect function. When the 32bit mode Non-PCM preamble based on Dolby
“AC-3 Data Stream in IEC60958 Interface” is detected, the AUTO bit goes “1”. The 96bit sync code consists of 0x0000,
0x0000, 0x0000, 0x0000, 0xF872 and 0x4E1F. Detection of this pattern will set the AUTO bit “1”. Once the AUTO bit is
set “1”, it will remain “1” until 4096 frames pass through the chip without additional sync pattern being detected. When
those preambles are detected, the burst preambles Pc and Pd that follow those sync codes are stored to registers. The
AK4588 also has the DTS-CD bitstream auto-detection function. When The AK4588 detects DTS-CD bitstreams,
DTSCD bit goes to “1”. When the next sync code does not come within 4096 flames, DTSCD bit goes to “0” until when
AK4114 detects the stream again.
■ 192kHz Clock Recovery
On chip low jitter PLL has a wide lock range with 32kHz to 192kHz and the lock time is less than 20ms. The AK4588
has the sampling frequency detect function. By either the clock comparison against X’tal oscillator or using the channel
status, AK4588 detects the sampling frequency (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz and 192kHz). The
PLL loses lock when the received sync interval is incorrect.
■ Master Clock
The AK4588 has two clock outputs, MCKO1 and MCKO2. These clocks are derived from either the recovered clock or
from the X’tal oscillator. The frequencies of the master clock outputs (MCKO1 and MCKO2) are set by OCKS0 and
OCKS1 as shown in Table 17. The 512fs clock will not output when 96kHz and 192kHz. The 256fs clock will not output
when 192kHz.
No.
0
1
2
3
OCKS1
0
0
1
1
OCKS0
0
1
0
1
MCKO1
256fs
256fs
512fs
128fs
MCKO2
256fs
128fs
256fs
64fs
X’tal
256fs
256fs
512fs
128fs
fs (max)
96 kHz
96 kHz
48 kHz
192 kHz
(default)
Table 17. Master Clock Frequency Select (Stereo mode)
■ Clock Operation Mode
The CM0/CM1 pins (or bits) select the clock source and the data source of SDTO. In Mode 2, the clock source is
switched from PLL to X’tal when PLL goes unlock state. In Mode3, the clock source is fixed to X’tal, but PLL is also
operating and the recovered data such as C bits can be monitored. For Mode2 and 3, it is recommended that the
frequency of X’tal is different from the recovered frequency from PLL.
Mode
0
1
CM1
0
0
CM0
0
1
UNLOCK
PLL
X’tal
Clock source SDTO
(default)
ON
ON(Note)
PLL
RX
OFF
ON
X’tal
DAUX
0
ON
ON
PLL
RX
2
1
0
1
ON
ON
X’tal
DAUX
3
1
1
ON
ON
X’tal
DAUX
ON: Oscillation (Power-up), OFF: STOP (Power-down)
Note : When the X’tal is not used as clock comparison for fs detection (i.e. XTL1,0= “1,1”), the X’tal is off.
Table 18. Clock Operation Mode select
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[AK4588]
■ Clock Source
The clock for the XTI pin can be generated b following methods.
1) X’tal
XTI
C
25kΩ(typ)
C
XTO
AK4588
Figure 17. X’tal mode
Note: External capacitance depends on the crystal oscillator (Typ. 10-40pF)
2) External clock
C
XTI
XTI
External
Clock
External
Clock
25kΩ(typ)
25kΩ(typ)
XTO
XTO
AK4588
AK4588
Figure 18 (5V). (a).External clock mode
(Input :CMOS Level)
- Note: Input clock must not exceed DVDD.
Figure 19 (3.3V). (b). External clock mode
(Input : ≥40%DVDD)
3) Fixed to the Clock Operation Mode 0
XTI
25kΩ(typ)
XTO
AK4588
Figure 20. OFF mode
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[AK4588]
■ Sampling Frequency and Pre-emphasis Detection
The AK4588 has two methods for detecting the sampling frequency as follows.
1. Clock comparison between recovered clock and X’tal oscillator
2. Sampling frequency information on channel status
Those could be selected by XTL1, 0 bits. And the detected frequency is reported on FS3-0 bits.
XTL1
0
0
1
1
XTL0
0
1
0
1
X’tal Frequency
11.2896MHz
12.288MHz
24.576MHz
(Use channel status)
(default)
Table 19. Reference X’tal frequency
Except XTL1,0= “1,1”
XTL1,0= “1,1”
Consumer
Register output
fs
Professional mode
mode
Clock comparison
(Note 25)
(Note 24)
Byte3
Byte0
Byte4
FS3
FS2
FS1
FS0
Bit3/2/1/0
Bit7/6
Bit6/5/4/3
0
0
0
0
44.1kHz
44.1kHz
0000
01
0000
0
0
0
1
Reserved
Reserved
0001
(Others)
0
0
1
0
48kHz
48kHz
0010
10
0000
0
0
1
1
32kHz
32kHz
0011
11
0000
1
0
0
0
88.2kHz
88.2kHz
(1000)
00
1010
1
0
1
0
96kHz
96kHz
(1010)
00
0010
1
1
0
0
176.4kHz
176.4kHz
(1100)
00
1011
1
1
1
0
192kHz
192kHz
(1110)
00
0011
Note 24. At least ±3% range is identified as the value in the Table 20. In case of intermediate frequency of those two,
FS3-0 bits indicate nearer value. When the frequency is much bigger than 192kHz or much smaller than 32kHz,
FS3-0 bits may indicate “0001”.
Note 25. When consumer mode, Byte3 Bit3-0 are copied to FS3-0 bits.
Table 20. fs Information
The pre-emphasis information is detected and reported on PEM bit. These information are extracted from channel 1 at
default. It can be switched to channel 2 by CS12 bit in control register.
PEM
Pre-emphasis
0
1
OFF
ON
Byte 0
Bits 3-5
≠ 0X100
0X100
Table 21. PEM in Consumer Mode
PEM
Pre-emphasis
0
1
OFF
ON
Byte 0
Bits 2-4
≠110
110
Table 22. PEM in Professional Mode
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[AK4588]
■ De-emphasis Filter Control
The AK4588 has a digital de-emphasis filter (tc=50/15µs) which corresponds to four sampling frequencies (32kHz,
44.1kHz, 48kHz and 96kHz) by IIR filter. When DEAU bit=“1”, the de-emphasis filter is enabled automatically by
sampling frequency and pre-emphasis information in the channel status. This is the default setting of de-emphasis filter of
the AK4588. In Serial Mode, DEM0/1 and DFS bits can control the de-emphasis filter when DEAU bit is “0”. The
internal de-emphasis filter is bypassed and the recovered data is output without any change if either pre-emphasis or
de-emphasis Mode is OFF.
PEM
1
1
1
1
1
0
FS3
0
0
0
1
FS2
0
0
0
0
FS1
0
1
1
1
FS0
0
0
1
0
Mode
44.1kHz
48kHz
32kHz
96kHz
(Others)
OFF
x
x
x
x
OFF
(x: Don’t care)
Table 23. De-emphasis Auto Control at DEAU bit = “1” (Default)
PEM
1
1
1
1
1
1
1
1
0
DFS
0
0
0
0
1
1
1
1
x
DEM1
0
0
1
1
0
0
1
1
x
DEM0
0
1
0
1
0
1
0
1
x
Mode
44.1kHz
OFF
(default)
48kHz
32kHz
OFF
OFF
96kHz
OFF
OFF
(x: Don’t care)
Table 24. De-emphasis Manual Control at DEAU bit = “0”
■ System Reset and Power-Down
The AK4588 has power-down mode for all circuits by the PDN pin and partially powered-down by PWN bit. The RSTN
bit initializes the register and resets the internal timing. In Parallel Mode, only the control by PDN pin is enabled. The
AK4588 should be reset once by bringing the PDN pin = “L” upon power-up.
PDN Pin: All analog and digital circuit are placed in the power-down and reset mode by bringing the PDN pin = “L”. All
registers are initialized, and clocks are stopped. Reading and witting to the register are disabled.
RSTN2 Bit (Address 00H; D0):
All the registers except PWN and RSTN2 bits are initialized by bringing RSTN2 bit = “0”. The internal
timings are also initialized. Witting to the register is not available except PWN and RSTN2 bits. Reading to the
register is disabled.
PWN Bit (Address 00H; D1):
The clock recovery part is initialized by bringing PWN bit = “0”. In this case, clocks are stopped. The registers
are not initialized and the mode settings are kept. Writing and Reading to the registers are enabled.
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[AK4588]
■ Biphase Input and Through Output
Eight receiver inputs (RX0-7) are available in Serial Control Mode. Each input includes amplifier corresponding to
unbalance mode and can accept the signal of 200mV or more. IPS2-0 bits selects the receiver channel. When BCU bit =
“1”, the Block start signal, C bit and U bit can be output from each pins.
IPS2
0
0
0
0
1
1
1
1
IPS1
0
0
1
1
0
0
1
1
IPS0
0
1
0
1
0
1
0
1
INPUT Data
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
(default)
Table 25. Recovery Data Select
B
1/4fs
COUT (or U,V)
SDTO2
C(R191)
C(L0)
R190
C(R0)
L191
C(L1)
R191
C(L31)
L0
L30
C(R31) C(L32)
R30
L31
LRCK2
(except I2S)
LRCK2
(I2S)
Figure 21. B/C/U/V output/input timings
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[AK4588]
■ Biphase Output
The AK4588 can output the data either the through output(from DIR) or transmitter output(DIT; the data from DAUX2 is
transformed to IEC60958 format.) from TX1/0 pins. Those could be selected by DIT bit. The source of the through
output from TX0 could be selected among RX0-8 by OPS00/ 01/ 02 bits, for TX1, by OPS10/ 11/ 12 bits respectively.
When output DAUX2 data, V bit could be controlled by the VIN pin and first 5 bytes of C bit could be controlled by
CT39-CT0 bits in control registers. When bit0= “0”(consumer mode), bit20-23 (Audio channel) could not be controlled
directly but be controlled by CT20 bit. When the CT20 bit is “1”, the AK4588 outputs “1000” as C20-23 for left channel
and output “0100” at C20-23 for right channel automatically. When CT20 bit is “0”, the AK4588 outputs “0000” set as
“1000” for sub frame 1, and “0100” for sub frame 2. U bits are fixed to “0”.as C20-23 for both channel. U bit could be
controlled by UDIT bit as follows; When UDIT bit is “0”, U bit is always “0”. When UDIT bit is “1”, the recovered U
bits are used for DIT (DIR/DIT loop mode of U bit). This mode is only available when PLL is locked in master mode.
OPS02
0
0
0
0
1
1
1
1
OPS01
0
0
1
1
0
0
1
1
OPS00
0
1
0
1
0
1
0
1
Output Data
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
(default)
Table 26. Output Data Select for TX0
DIT
0
0
0
0
0
0
0
0
1
OPS12
0
0
0
0
1
1
1
1
x
OPS11
0
0
1
1
0
0
1
1
x
OPS10
0
1
0
1
0
1
0
1
x
Output Data
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
DAUX2
(default)
Table 27. Output Data Select for TX1
LRCK2
(except I2S)
LRCK2
(I2S)
DAUX2
L0
R0
L1
R1
VIN
R191
L0
R0
L1
Figure 22. DAUX2 and VIN input timings
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[AK4588]
■ Biphase signal input/output circuit
0.1uF
RX
75Ω
Coax
75Ω
AK4588
Figure 23. Consumer Input Circuit (Coaxial Input)
Note: In case of coaxial input, if a coupling level to this input from the next RX input line pattern exceeds
50mV, there is a possibility of malfunction. Connecting a decoupling capacitor can lower this
coupling noise.
Optical Receiver
Optical
Fiber
470
RX
O/E
AK4588
Figure 24. Consumer Input Circuit (Optical Input)
For coaxial input, as the input level of RX line is small in Serial Mode, cross-talking among RX input lines have to be
avoided. For example, by inserting the shield pattern among them. In Parallel Mode, only one channel input (RX1) is
available and RX2-4 change to other pins for audio format control. Those pins must be fixed to “H” or “L”.
The AK4588 has a TX output buffer. The output level meets 0.5V+/-20% with the external resistors. The T1 in Figure 25
is a transformer of 1:1.
330±2%
TX
75Ω cable
100±2%
DVSS
T1
Figure 25. TX External Resistor Network
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[AK4588]
■ Q-subcode buffers
The AK4588 has Q-subcode buffer for CD application. The AK4588 takes Q-subcode into registers in following
conditions.
1. The sync word (S0,S1) is constructed at least 16 “0”s.
2. The start bit is “1”.
3. Those 7bits Q-W follows to the start bit.
4. The distance between two start bits are 8-16 bits.
The QINT bit in the control register goes “1” when the new Q-subcode differs from old one, and goes “0” when QINT bit
is read.
S0
S1
S2
S3
:
S97
S0
S1
S2
S3
:
1
0
0
1
1
:
1
0
0
1
1
:
2
3
4
5
6
7
8
*
0
0
0
0
0
0
0
0…
0
0
0
0
0
0
0
0…
Q2 R2 S2
T2
U2 V2 W2 0…
Q3 R3 S3
T3
U3 V3 W3 0…
:
:
:
:
:
:
:
:
Q97 R97 S97 T97 U97 V97 W97 0…
0
0
0
0
0
0
0
0…
0
0
0
0
0
0
0
0…
Q2 R2 S2
T2
U2 V2 W2 0…
Q3 R3 S3
T3
U3 V3 W3 0…
:
:
:
:
:
:
:
:
↑
Q
Q2
Q3 Q4
CTRL
Q5
Q6
Q7 Q8
ADRS
(*) number of “0” : min=0; max=8.
Figure 26. Configuration of U-bit(CD)
Q9
Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q24 Q25
TRACK NUMBER
INDEX
Q26 Q27 Q28 Q29 Q30 Q31 Q32 Q33 Q34 Q35 Q36 Q37 Q38 Q39 Q40 Q41 Q42 Q43 Q44 Q45 Q46 Q47 Q48 Q49
MINUTE
SECOND
FRAME
Q50 Q51 Q52 Q53 Q54 Q55 Q56 Q57 Q58 Q59 Q60 Q61 Q62 Q63 Q64 Q65 Q66 Q67 Q68 Q69 Q70 Q71 Q72 Q73
ZERO
ABSOLUTE MINUTE
ABSOLUTE SECOND
Q74 Q75 Q76 Q77 Q78 Q79 Q80 Q81 Q82 Q83 Q84 Q85 Q86 Q87 Q88 Q89 Q90 Q91 Q92 Q93 Q94 Q95 Q96 Q97
ABSOLUTE FRAME
CRC
G(x)=x^16+x^12+x^5+1
Figure 27. Q-subcode
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
16H Q-subcode Address / Control
17H Q-subcode Track
18H Q-subcode Index
Q9
Q17
···
Q8
Q16
···
···
···
···
···
···
···
···
···
···
···
···
···
Q3
Q11
···
Q2
Q10
···
19H Q-subcode Minute
···
···
···
···
···
···
···
···
1AH Q-subcode Second
···
···
···
···
···
···
···
···
1BH Q-subcode Frame
···
···
···
···
···
···
···
···
1CH Q-subcode Zero
···
···
···
···
···
···
···
···
1DH Q-subcode ABS Minute
···
···
···
···
···
···
···
···
1EH Q-subcode ABS Second
···
···
···
···
···
···
···
···
1FH Q-subcode ABS Frame
Q81
Q80
···
···
···
···
Q75
Q74
Figure 28. Q-subcode register
MS0287-E-03
2009/05
- 50 -
[AK4588]
■ Error Handling
There are the following eight events that make INT0/1 pins “H”. INT0/1 pins show the status of following conditions.
1. UNLOCK: “1” when the PLL loses lock.
The AK4588 loses lock when the distance between two preambles is not correct or when those
preambles are not correct.
“1” when parity error or biphase coding error is detected, and keeps “1” until this register is read.
2. PAR:
Updated every sub-frame cycle. Reading this register resets itself.
“1” when Non-PCM bitstream is detected.
3. AUTO:
Updated every 4096 frames cycle.
“1” when DTS-CD bitstream is detected.
4. DTSCD:
Updated every DTS-CD sync cycle.
“1” when the “AUDIO” bit in recovered channel status indicates “1”.
5. AUDION:
Updated every block cycle.
“1” when “PEM” in recovered channel status indicates “1”.
6. PEM:
Updated every block cycle.
“1” when Q-subcode differ from old one, and keeps “1” until this register is read.
7. QINT:
Updated every sync code cycle for Q-subcode. Reading this register resets itself.
“1” when received C bits differ from old one, and keeps “1” until this register is read.
8. CINT:
Updated every block cycle. Reading this register resets itself.
Both INT0/1 are fixed to “L” when the PLL is off (CM1,0= “01”). Once the INT0 pin goes to “H”, this pin holds “H” for
1024/fs cycles (this value can be changed by EFH0/1 bits) after those events are removed. INT1 pin goes to “L” at the
same time when those events are removed. Each INT0/1 pins can mask those eight events individually. Once PAR, QINT
and CINT bit goes to “1”, those registers are held to “1” until those registers are read. While the AK4588 is unlocked,
registers regarding C-bit or U-bits are not initialized and keep previous value.
INT0/1 pin output the ORed signal on those eight events. However, each events can be masked by each mask bits. When
each bit masks those events, the event does not affect INT0/1 pins operation (those mask do not affect those registers
(UNLOCK, PAR, etc.) themselves. Once the INT0 pin goes “H”, it maintains “H” for 1024/fs cycles (this value can be
changed by EFH0-1 bits) after the all events are removed. Once those PAR, QINT or CINT bit goes “1”, it holds “1” until
reading those registers. While the AK4588 loses lock, the channel status an Q-subcode bits are not updated and holds the
previous data. At initial state, the INT0 pin outputs the ORed signal between UNLOCK and PAR, the INT1 pin outputs
the ORed signal among AUTO, DTSCD and AUDION.
UNLOCK
1
0
0
0
0
0
0
0
PAR
x
1
0
0
0
0
0
0
AUTO
x
x
1
x
x
x
x
x
Register
DTSCD AUDION PEM QINT
x
x
x
x
x
x
x
x
x
x
x
x
1
x
x
x
x
1
x
x
x
x
1
x
x
x
x
1
x
x
x
x
Table 28. Error Handling
MS0287-E-03
Pin
CINT
x
x
x
x
x
x
x
1
SDTO2
L
Previous Data
Output
Output
Output
Output
Output
Output
V
L
Output
Output
Output
Output
Output
Output
Output
TX
Output
Output
Output
Output
Output
Output
Output
Output
2009/05
- 51 -
[AK4588]
Error
(UNLOCK, PAR,..)
(Error)
INT0 pin
Hold Time (max: 4096/fs)
INT1 pin
Hold Time = 0
Register
(PAR,CINT,QINT)
Reset
Hold ”1”
Register
(others)
Command
MCKO,BICK2,LRCK2
(UNLOCK)
MCKO,BICK2,LRCK2
(except UNLOCK)
READ 06H
Free Run
(fs: around 20kHz)
SDTO2 (UNLOCK)
SDTO2
(PAR error)
Previous Data
SDTO2
(others)
VOUT pin
(UNLOCK)
VOUT pin
(except UNLOCK)
Normal Operation
Figure 29. INT0/1 pin timing
MS0287-E-03
2009/05
- 52 -
[AK4588]
PDN pin ="L" to "H"
Initialize
Read 06H
INT0/1 pin ="H"
No
Yes
Release
Muting
Mute DA C output
Read 06H
(Each Error Handling)
Read 06H
(Res ets registers)
No
INT0/1 pin ="H"
Yes
Figure 30. Error Handling Sequence Example 1
MS0287-E-03
2009/05
- 53 -
[AK4588]
PDN pin ="L" to "H"
Initialize
Read 06H
No
INT1 pin ="H"
Yes
Read 06H
and
Detect QSUB= “1”
(Read Q-buffer)
QCRC = “0”
No
New data
is invalid
Yes
INT1 pin ="L"
No
Yes
New data
is valid
Figure 31. Error Handling Sequence Example 2 (for Q/CINT)
MS0287-E-03
2009/05
- 54 -
[AK4588]
■ Audio Serial Interface Format
The DIF0, DIF1 and DIF2 pins can select eight serial data formats as shown in Table 29. In all formats the serial data is
MSB-first, 2’s complement format. The SDTO2 is clocked out on the falling edge of BICK2 and the DAUX2 is latched
on the rising edge of BICK2. BICK2 outputs 64fs clock in Mode 0-5. Mode 6-7 are Slave Modes, and BICK2 is available
up to 128fs at fs=48kHz. In the format equal or less than 20bit (Mode0-2), LSBs in sub-frame are truncated. In Mode 3-7,
the last 4LSBs are auxiliary data (Figure 32).
When using Master mode, BICK2 and KRCK2 output pins are Hi-Z during PDN pin = “L” and from PDN pin =
“H” to entering Master mode.
When the Parity Error, Biphase Error or Frame Length Error occurs in a sub-frame, the AK4588 continues to output the
last normal sub-frame data from SDTO2 repeatedly until the error is removed. When the Unlock Error occurs, the
AK4588 outputs “0” from the SDTO2 pin. In case of using the DAUX2 pin, the data is transformed and output from
SDTO2. The DAUX2 pin is used in Clock Operation Mode 1/ 3 and unlock state of Mode 2.
The input data format to DAUX2 should be left justified except in Mode5 and 7(Table 29). In Mode5 or 7, both the input
data format of DAUX2 and output data format of SDTO2 are I2S. Mode6 and 7 are Slave Mode that is corresponding to
the Master Mode of Mode4 and 5. In salve Mode, LRCK2 and BICK2 should be fed with synchronizing to MCKO1/2.
sub-frame of IEC60958
0
3 4
preamble
7 8
11 12
27 28 29 30 31
Aux.
V U C P
LSB
MSB
MSB
LSB
23
0
AK4588 Audio Data (MSB First)
Figure 32. Bit configuration
Mode
DIF2
DIF1
DIF0
0
1
2
3
4
5
6
7
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
DAUX2
24bit, Left justified
24bit, Left justified
24bit, Left justified
24bit, Left justified
24bit, Left justified
24bit, I2S
24bit, Left justified
24bit, I2S
SDTO2
16bit, Right justified
18bit, Right justified
20bit, Right justified
24bit, Right justified
24bit, Left justified
24bit, I2S
24bit, Left justified
24bit, I2S
LRCK2
I/O
H/L
O
H/L
O
H/L
O
H/L
O
H/L
O
L/H
O
H/L
I
L/H
I
BICK2
64fs
64fs
64fs
64fs
64fs
64fs
64-128fs
64-128fs
I/O
O
O
O
O
O
O
I
I
(default)
Table 29. Audio data format
MS0287-E-03
2009/05
- 55 -
[AK4588]
LRCK2
0
1
2
15
16
17
31
0
1
2
15
16
17
31
0
1
0
1
0
1
BICK2
(0:64fs)
15
14
1
0
15
14
1
0
SDTO2
15:MSB, 0:LSB
Rch Data
Lch Data
Figure 33. Mode 0 Timing
LRCK2
0
1
2
9
10
12
11
31
0
1
2
9
10
11
12
31
BICK2
(0:64fs)
23
22
21
20
1
0
23
22
21
20
1
0
SDTO2
23:MSB, 0:LSB
Rch Data
Lch Data
Figure 34. Mode 3 Timing
LRCK2
0
1
2
21
22
24
23
31
0
1
2
21
22
23
24
31
BICK2
(64fs)
23
22 21
2
1
0
23 22
3
2
1
0
23 22
SDTO2
23:MSB, 0:LSB
Rch Data
Lch Data
Figure 35. Mode 4/6 Timing
Mode4: LRCK2, BICK2: Output
Mode6: LRCK2, BICK2: Input
LRCK2
0
1
2
22
24
23
25
31
0
1
2
21
22
23
24
25
31
0
1
BICK2
(64fs)
SDTO2
23
22 21
2
1
23 22
0
3
2
1
0
23
23:MSB, 0:LSB
Rch Data
Lch Data
Figure 36. Mode 5/7 Timing
MS0287-E-03
Mode5: LRCK2, BICK2: Output
Mode7: LRCK2, BICK2: Input
2009/05
- 56 -
[AK4588]
■ Register Map
Addr
D7
D6
D5
D4
D3
D2
D1
D0
CS12
BCU
CM1
CM0
OCKS1
OCKS0
PWN
RSTN2
01H
Register Name
CLK & Power Down
Control
Format & De-em Control
0
DIF2
DIF1
DIF0
DEAU
DEM1
DEM0
DFS
02H
Input/ Output Control 0
TX1E
OPS12
OPS11
OPS10
TX0E
OPS02
OPS01
OPS00
03H
Input/ Output Control 1
EFH1
EFH0
UDIT
0
DIT
IPS2
IPS1
IPS0
04H
INT0 MASK
MQIT0 MAUT0
MCIT0
MULK0 MDTS0
MPE0
MAUD0
MPAR0
05H
INT1 MASK
MQIT1 MAUT1
MCIT1
MULK1 MDTS1
MPE1
MAUD1
MPAR1
06H
Receiver status 0
QINT
AUTO
CINT
UNLCK DTSCD
PEM
AUDION
PAR
07H
Receiver status 1
FS3
FS2
FS1
V
QCRC
CCRC
08H
RX Channel Status Byte 0
CR7
CR6
CR5
CR4
CR3
CR2
CR1
CR0
09H
RX Channel Status Byte 1
CR15
CR14
CR13
CR12
CR11
CR10
CR9
CR8
0AH
RX Channel Status Byte 2
CR23
CR22
CR21
CR20
CR19
CR18
CR17
CR16
0BH
RX Channel Status Byte 3
CR31
CR30
CR29
CR28
CR27
CR26
CR25
CR24
0CH
RX Channel Status Byte 4
CR39
CR38
CR37
CR36
CR35
CR34
CR33
CR32
0DH
TX Channel Status Byte 0
CT7
CT6
CT5
CT4
CT3
CT2
CT1
CT0
0EH
TX Channel Status Byte 1
CT15
CT14
CT13
CT12
CT11
CT10
CT9
CT8
0FH
TX Channel Status Byte 2
CT23
CT22
CT21
CT20
CT19
CT18
CT17
CT16
10H
TX Channel Status Byte 3
CT31
CT30
CT29
CT28
CT27
CT26
CT25
CT24
11H
TX Channel Status Byte 4
CT39
CT39
CT39
CT39
CT39
CT39
CT39
CT32
12H
Burst Preamble Pc Byte 0
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
13H
Burst Preamble Pc Byte 1
PC15
PC14
PC13
PC12
PC11
PC10
PC9
PC8
14H
Burst Preamble Pd Byte 0
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
15H
Burst Preamble Pd Byte 1
PD15
PD14
PD13
PD12
PD11
PD10
PD9
PD8
16H
Q-subcode Address / Control
Q9
Q8
Q7
Q6
Q5
Q4
Q3
Q2
17H
Q-subcode Track
Q17
Q16
Q15
Q14
Q13
Q12
Q11
Q10
18H
Q-subcode Index
Q25
Q24
Q23
Q22
Q21
Q20
Q19
Q18
00H
FS0
0
19H
Q-subcode Minute
Q33
Q32
Q31
Q30
Q29
Q28
Q27
Q26
1AH
Q-subcode Second
Q41
Q40
Q39
Q38
Q37
Q36
Q35
Q34
1BH
Q-subcode Frame
Q49
Q48
Q47
Q46
Q45
Q44
Q43
Q42
1CH
Q-subcode Zero
Q57
Q56
Q55
Q54
Q53
Q52
Q51
Q50
1DH
Q-subcode ABS Minute
Q65
Q64
Q63
Q62
Q61
Q60
Q59
Q58
1EH
Q-subcode ABS Second
Q73
Q72
Q71
Q70
Q69
Q68
Q67
Q66
1FH Q-subcode ABS Frame
Q81
Q80
Q79
Q78
Q77
Q76
Q75
When PDN pin goes “L”, the registers are initialized to their default values.
When RSTN bit goes “0”, the internal timing is reset and the registers are initialized to their default values.
All data can be written to the register even if PWN bit is “0”.
01H D7 and 03H D4 should be written “0” data.
Q74
MS0287-E-03
2009/05
- 57 -
[AK4588]
■ Register Definitions
Reset & Initialize
Addr
Register Name
00H CLK & Power Down Control
R/W
Default
D7
CS12
R/W
0
D6
BCU
R/W
1
D5
CM1
R/W
0
D4
CM0
R/W
0
D3
D2
OCKS1 OCKS0
R/W
R/W
0
0
D1
PWN
R/W
1
D0
RSTN2
R/W
1
RSTN2: Timing Reset & Register Initialize
0: Reset & Initialize
1: Normal Operation
PWN: Power Down
0: Power Down
1: Normal Operation
OCKS1-0: Master Clock Frequency Select
CM1-0: Master Clock Operation Mode Select
BCU: Block start & C/U Output Mode
When BCU=1, the three Output Pins(BOUT, COUT, UOUT) become to be enabled.
The block signal goes high at the start of frame 0 and remains high until the end of frame 31.
CS12: Channel Status Select
0: Channel 1
1: Channel 2
Selects which channel status is used to derive C-bit buffers, AUDION, PEM, FS3, FS2, FS1, FS0,
Pc and Pd. The de-emphasis filter is controlled by channel 1 in the Parallel Mode.
Format & De-emphasis Control
Addr
Register Name
01H Format & De-em Control
R/W
Default
D7
0
RD
0
D6
DIF2
R/W
1
D5
DIF1
R/W
1
D4
DIF0
R/W
0
D3
DEAU
R/W
1
D2
DEM1
R/W
0
D1
DEM0
R/W
1
D0
DFS
R/W
0
DFS: 96kHz De-emphasis Control
DEM1-0: 32, 44.1, 48kHz De-emphasis Control (Table 24.)
DEAU: De-emphasis Auto Detect Enable
0: Disable
1: Enable
DIF2-0: Audio Data Format Control (Table 29.)
MS0287-E-03
2009/05
- 58 -
[AK4588]
Input/Output Control
Addr
Register Name
02H Input/ Output Control 0
R/W
Default
D7
TX1E
R/W
1
D6
D5
D4
OPS12 OPS11 OPS10
R/W
R/W
R/W
0
0
0
D3
TX0E
R/W
1
D2
D1
D0
OPS02 OPS01 OPS00
R/W
R/W
R/W
0
0
0
OPS02-00: Output Through Data Select for TX0 pin
OPS12-10: Output Through Data Select for TX1 pin
TX0E: TX0 Output Enable
0: Disable. TX0 pin outputs “L”.
1: Enable
TX1E: TX1 Output Enable
0: Disable. TX1 pin outputs “L”.
1: Enable
Addr
Register Name
03H Input/ Output Control 1
R/W
Default
D7
EFH1
R/W
0
D6
EFH0
R/W
1
D5
UDIT
R/W
0
D4
0
RD
0
D3
DIT
R/W
1
D2
IPS2
R/W
0
D1
IPS1
R/W
0
D0
IPS0
R/W
0
IPS2-0: Input Recovery Data Select
DIT: Through data/Transmit data select for TX1 pin
0: Through data (RX data).
1: Transmit data (DAUX2 data).
UDIT: U bit control for DIT
0: U bit is fixed to “0”
1: Recovered U bit is used for DIT (loop mode for U bit)
EFH1-0: Interrupt 0 Pin Hold Count Select
00: 512 LRCK2
01: 1024 LRCK2
10: 2048 LRCK2
11: 4096 LRCK2
MS0287-E-03
2009/05
- 59 -
[AK4588]
Mask Control for INT0
Addr
Register Name
04H INT0 MASK
R/W
Default
D7
MQI0
R/W
1
D6
MAT0
R/W
1
D5
MCI0
R/W
1
D4
MUL0
R/W
0
D3
MDTS0
R/W
1
D2
MPE0
R/W
1
D1
MAN0
R/W
1
D0
MPR0
R/W
0
D5
MCI1
R/W
1
D4
MUL1
R/W
1
D3
MDTS1
R/W
0
D2
MPE1
R/W
1
D1
MAN1
R/W
0
D0
MPR1
R/W
1
MPR0: Mask Enable for PAR bit
MAN0: Mask Enable for AUDN bit
MPE0: Mask Enable for PEM bit
MDTS0: Mask Enable for DTSCD bit
MUL0: Mask Enable for UNLOCK bit
MCI0: Mask Enable for CINT bit
MAT0: Mask Enable for AUTO bit
MQI0: Mask Enable for QINT bit
0: Mask disable
1: Mask enable
Mask Control for INT1
Addr
Register Name
05H INT1 MASK
R/W
Default
D7
MQI1
R/W
1
D6
MAT1
R/W
0
MPR1: Mask Enable for PAR bit
MAN1: Mask Enable for AUDN bit
MPE1: Mask Enable for PEM bit
MDTS1: Mask Enable for DTSCD bit
MUL1: Mask Enable for UNLOCK0 bit
MCI1: Mask Enable for CINT bit
MAT1: Mask Enable for AUTO bit
MQI1: Mask Enable for QINT bit
0: Mask disable
1: Mask enable
MS0287-E-03
2009/05
- 60 -
[AK4588]
Receiver Status 0
Addr
Register Name
06H Receiver status 0
R/W
Default
D7
QINT
RD
0
D6
AUTO
RD
0
D5
CINT
RD
0
D4
D3
UNLCK DTSCD
RD
RD
0
0
D2
PEM
RD
0
D1
AUDION
RD
0
D0
PAR
RD
0
D2
V
RD
0
D1
QCRC
RD
0
D0
CCRC
RD
0
PAR: Parity Error or Biphase Error Status
0:No Error
1:Error
It is “1” if Parity Error or Biphase Error is detected in the sub-frame.
AUDION: Audio Bit Output
0: Audio
1: Non Audio
This bit is made by encoding channel status bits.
PEM: Pre-emphasis Detect.
0: OFF
1: ON
This bit is made by encoding channel status bits.
DTSCD: DTS-CD Auto Detect
0: No detect
1: Detect
UNLCK: PLL Lock Status
0: Locked
1: Out of Lock
CINT: Channel Status Buffer Interrupt
0: No change
1: Changed
AUTO: Non-PCM Auto Detect
0: No detect
1: Detect
QINT: Q-subcode Buffer Interrupt
0: No change
1: Changed
QINT, CINT and PAR bits are initialized when 06H is read.
Receiver Status 1
Addr
Register Name
07H Receiver status 1
R/W
Default
D7
FS3
RD
0
D6
FS2
RD
0
D5
FS1
RD
0
D4
FS0
RD
1
D3
0
RD
0
CCRC: Cyclic Redundancy Check for Channel Status
0:No Error
1:Error
QCRC: Cyclic Redundancy Check for Q-subcode
0:No Error
1:Error
V: Validity of channel status
0:Valid
1:Invalid
FS3-0: Sampling Frequency detection (Table 20.)
MS0287-E-03
2009/05
- 61 -
[AK4588]
Receiver Channel Status
Addr
08H
09H
0AH
0BH
0CH
Register Name
RX Channel Status Byte 0
RX Channel Status Byte 1
RX Channel Status Byte 2
RX Channel Status Byte 3
RX Channel Status Byte 4
R/W
Default
D7
CR7
CR15
CR23
CR31
CR39
D6
CR6
CR14
CR22
CR30
CR38
D5
CR5
CR13
CR21
CR29
CR37
D4
CR4
CR12
CR20
CR28
CR36
D3
CR3
CR11
CR19
CR27
CR35
D2
CR2
CR10
CR18
CR26
CR34
D1
CR1
CR9
CR17
CR25
CR33
D0
CR0
CR8
CR16
CR24
CR32
D2
CT2
CT10
CT18
CT26
CT34
D1
CT1
CT9
CT17
CT25
CT335
D0
CT0
CT8
CT16
CT24
CT32
D2
PC2
PC10
PD2
PD10
D1
PC1
PC9
PD1
PD9
D0
PC0
PC8
PD0
PD8
RD
Not initialized
CR39-0: Receiver Channel Status Byte 4-0
Transmitter Channel Status
Addr
0DH
0EH
0FH
10H
11H
Register Name
TX Channel Status Byte 0
TX Channel Status Byte 1
TX Channel Status Byte 2
TX Channel Status Byte 3
TX Channel Status Byte 3
R/W
Default
D7
CT7
CT15
CT23
CT31
CT39
D6
CT6
CT14
CT22
CT30
CT38
D5
CT5
CT13
CT21
CT29
CT37
D4
D3
CT4
CT3
CT12
CT11
CT20
CT19
CT28
CT27
CT36
CT35
R/W
0
CT39-0: Transmitter Channel Status Byte 4-0
Burst Preamble Pc/Pd in non-PCM encoded Audio Bitstreams
Addr
12H
13H
14H
15H
Register Name
Burst Preamble Pc Byte 0
Burst Preamble Pc Byte 1
Burst Preamble Pd Byte 0
Burst Preamble Pd Byte 1
R/W
Default
D7
PC7
PC15
PD7
PD15
D6
PC6
PC14
PD6
PD14
D5
PC5
PC13
PD5
PD13
D4
PC4
PC12
PD4
PD12
D3
PC3
PC11
PD3
PD11
RD
Not initialized
PC15-0: Burst Preamble Pc Byte 0 and 1
PD15-0: Burst Preamble Pd Byte 0 and 1
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2009/05
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[AK4588]
Q-subcode Buffer
Addr
16H
17H
18H
19H
1AH
1BH
1CH
1DH
1EH
1FH
Register Name
Q-subcode Address / Control
Q-subcode Track
Q-subcode Index
Q-subcode Minute
Q-subcode Second
Q-subcode Frame
Q-subcode Zero
Q-subcode ABS Minute
Q-subcode ABS Second
Q-subcode ABS Frame
R/W
Default
D7
Q9
Q17
Q25
Q33
Q41
Q49
Q57
Q65
Q73
Q81
D6
Q8
Q16
Q24
Q32
Q40
Q48
Q56
Q64
Q72
Q80
D5
Q7
Q15
Q23
Q31
Q39
Q47
Q55
Q63
Q71
Q79
D4
Q6
Q14
Q22
Q30
Q38
Q46
Q54
Q62
Q70
Q78
D3
Q5
Q13
Q21
Q29
Q37
Q45
Q53
Q61
Q69
Q77
D2
Q4
Q12
Q20
Q28
Q36
Q44
Q52
Q60
Q68
Q76
D1
Q3
Q11
Q19
Q27
Q35
Q43
Q51
Q59
Q67
Q75
D0
Q2
Q10
Q18
Q26
Q34
Q42
Q50
Q58
Q66
Q74
RD
Not initialized
MS0287-E-03
2009/05
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[AK4588]
■ Burst Preambles in non-PCM Bitstreams
sub-frame of IEC958
0
3 4
preamble
7 8
11 12
Aux.
27 28 29 30 31
LSB
MSB V U C P
16 bits of bitstream
0
Pa Pb Pc Pd
15
Burst_payload
stuffing
repetition time of the burst
Figure 37. Data structure in IEC60958
Preamble word
Pa
Pb
Pc
Pd
Length of field
16 bits
16 bits
16 bits
16 bits
Contents
sync word 1
sync word 2
Burst info
Length code
Value
0xF872
0x4E1F
see Table 31
Numbers of bits
Table 30. Burst preamble words
MS0287-E-03
2009/05
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[AK4588]
Bits of Pc Value
Contents
0-4
data type
NULL data
Dolby AC-3 data
reserved
PAUSE
MPEG-1 Layer1 data
MPEG-1 Layer2 or 3 data or MPEG-2 without extension
MPEG-2 data with extension
MPEG-2 AAC ADTS
MPEG-2, Layer1 Low sample rate
MPEG-2, Layer2 or 3 Low sample rate
reserved
DTS type I
DTS type II
DTS type III
ATRAC
ATRAC2/3
reserved
reserved, shall be set to “0”
error-flag indicating a valid burst_payload
error-flag indicating that the burst_payload may contain
errors
data type dependent info
bit stream number, shall be set to “0”
5, 6
7
8-12
13-15
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16-31
0
0
1
0
Repetition time of burst
in IEC60958 frames
≤4096
1536
384
1152
1152
1024
384
1152
512
1024
2048
512
1024
Table 31. Fields of burst info Pc
MS0287-E-03
2009/05
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[AK4588]
■ Non-PCM Bitstream timing
1) When Non-PCM preamble is not coming within 4096 frames,
PDN pin
Bit stream
Pa Pb Pc1 Pd1
Pa Pb Pc2 Pd2
Repetition time
Pa Pb Pc3 Pd3
>4096 frames
AUTO bit
Pc Register
“0”
Pd Register
“0”
Pc1
Pc2
Pd1
Pc3
Pd2
Pd3
Figure 38. Timing example 1
2) When Non-PCM bitstream stops (when MULK0= “0”),
INT0 hold time
INT0 pin
<20mS (Lock time)
Bit stream
Pa Pb Pc1 Pd1
Stop
Pa Pb Pcn Pdn
2~3 Syncs (B,M or W)
<Repetition time
AUTO bit
Pc Register
Pd Register
Pc0
Pc1
Pd0
Pcn
Pd1
Pdn
Figure 39. Timing example 2
MS0287-E-03
2009/05
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[AK4588]
OPERATION OVERVIEW (ADC/DAC part, DIR/DIT part)
■ Serial Control Interface
The AK4588 has two registers, which are ADC/DAC part (AK4628 compatible) and DIR/DIT part (AK4114
compatible). Each register is set by chip address pin.
(1). 4-wire serial control mode (I2C pin = “L”)
The internal registers may be either written or read by the 4-wire μP interface pins: CSN, CCLK, CDTI & CDTO. The
data on this interface consists of Chip address (2bits, ADC/DAC part register is set by CAD1/0 pins. DIR/DIT part C1-0
bits are fixed to “00”), Read/Write (1bit), 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. For write
operations, data is latched after the 16th rising edge of CCLK, after a high-to-low transition of CSN. For read
operations, the CDTO output goes high impedance after a low-to-high transition of CSN. The maximum speed of
CCLK is 5MHz. the PDN pin = “L” resets the registers to their default values. When the state of the P/S pin is changed,
the AK4588 should be reset by the PDN pin = “L”. Register of ADC/DAC part can not read.
CSN
0
1
2
3
4
5
6
7
8
9
10 11 12 13
14 15
CCLK
CDTI
WRITE
CDTO
CDTI
READ
CDTO
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
Hi-Z
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
Hi-Z
D7 D6 D5 D4 D3 D2 D1 D0
Hi-Z
C1-C0: Chip Address: (Regarding ADC/DAC part, register is set by CAD1/0
pins. This chip address must be set except “00”.)
(Fixed to “00” for DIR/DIT part)
R/W: READ/WRITE (0:READ, 1:WRITE)
A4-A0: Register Address
D7-D0: Control Data
Figure 40. 4-wire Serial Control I/F Timing
MS0287-E-03
2009/05
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[AK4588]
(2). I2C bus control mode (I2C pin = “H”)
The AK4588 supports standard-mode I2C-bus (max: 100kHz). Then the AK4588 does not support fast-mode I2C-bus
system (max: 400kHz).
(2)-1. Data transfer
All commands are preceded by START condition. After the START condition, a slave address is sent. After the AK4588
recognizes START condition, the device interfaced to the bus waits for the slave address to be transmitted over the SDA
line. If the transmitted slave address matches an address for one of the devices, the designated slave device pulls the
SDA line to LOW (ACKNOWLEDGE). The data transfer is always terminated by STOP condition generated by the
master device.
(2)-1-1. Data validity
The data on the SDA line must be stable during the HIGH period of the clock. The HIGH or LOW state of the data line
can only be changed when the clock signal on the SCL line is LOW except for the START and the STOP condition.
SCL
SDA
DATA LINE
STABLE :
DATA VALID
CHANGE
OF DATA
ALLOWED
Figure 41. Data transfer
(2)-1-2. START and STOP condition
HIGH to LOW transition on the SDA line while SCL is HIGH indicates START condition. All sequences start from
START condition.
LOW to HIGH transition on the SDA line while SCL is HIGH defines STOP condition. All sequences end by STOP
condition.
SCL
SDA
START CONDITION
STOP CONDITION
Figure 42. START and STOP conditions
MS0287-E-03
2009/05
- 68 -
[AK4588]
(2)-1-3. ACKNOWLEDGE
ACKNOWLEDGE is a software convention used to indicate successful data transfers. The transmitting device will
release the SDA line (HIGH) after transmitting eight bits. The receiver must pull down the SDA line during the
acknowledge clock pulse so that that it remains stable “L” during “H” period of this clock pulse. The AK4588 will
generates an acknowledge after each byte has been received.
In the read mode, the slave, the AK4588 will transmit eight bits of data, release the SDA line and monitor the line for an
acknowledge. If an acknowledge is detected and no STOP condition is generated by the master, the slave will continue
to transmit data. If an acknowledge is not detected, the slave will terminate further data transmissions and await STOP
condition.
The register of ADC/DAC part can not generate acknowledge for READ operations.
Clock pulse
for acknowledge
SCL FROM
MASTER
1
8
9
DATA
OUTPUT BY
TRANSMITTER
not acknowledge
DATA
OUTPUT BY
RECEIVER
START
CONDITION
acknowledge
Figure 43. Acknowledge on the I2C-bus
(2)-1-4. FIRST BYTE
The first byte, which includes seven bits of slave address and one bit of R/W bit, is sent after START condition. If the
transmitted slave address matches an address for one of the device, the receiver who has been addressed pulls down the
SDA line.
The most significant five bits of the slave address are fixed as “00100”. The next two bits are CAD1 and CAD0 (device
address bits). These two bits identify the specific device on the bus. The hard-wired input pins (CAD1 pin and CAD0
pin) set them. The eighth bit (LSB) of the first byte (R/W bit) defines whether a write or read condition is requested by
the master. A “1” indicates that the read operation is to be executed. A “0” indicates that the write operation is to be
executed.
0
0
1
0
0
CAD1
CAD0
R/W
(Regarding ADC/DAC part, register is set by CAD1/0 pins. “00” is inhibited to
set for ADC/DAC.)
(Fixed to “00” for DIR/DIT part)
Figure 44. The First Byte
MS0287-E-03
2009/05
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[AK4588]
(2)-2. WRITE Operations
Set R/W bit = “0” for the WRITE operation of the AK4588.
After receipt the start condition and the first byte, the AK4588 generates an acknowledge, and awaits the second byte
(register address). The second byte consists of the address for control registers of the AK4588. The format is MSB first,
and those most significant 3-bits are “Don’t care”.
*
*
*
A4
A3
A2
A1
A0
(*: Don’t care)
Figure 45. The Second Byte
After receipt the second byte, the AK4588 generates an acknowledge, and awaits the third byte. Those data after the
second byte contain control data. The format is MSB first, 8bits.
D7
D6
D5
D4
D3
D2
D1
D0
Figure 46. Byte structure after the second byte
The AK4588 is capable of more than one byte write operation by one sequence.
After receipt of the third byte, the AK4588 generates an acknowledge, and awaits the next data again. The master can
transmit more than one words instead of terminating the write cycle after the first data word is transferred. After the
receipt of each data, the internal 5bits address counter is incremented by one, and the next data is taken into next
address automatically. If the address exceed 1FH prior to generating the stop condition, the address counter will “roll
over” to 00H and the previous data will be overwritten.
S
T
A
R
T
SDA
Register
Address(n)
Slave
Address
S
T
Data(n+x) O
P
Data(n+1)
Data(n)
P
S
A
C
K
A
C
K
A
C
K
A
C
K
Figure 47. WRITE Operation
MS0287-E-03
2009/05
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[AK4588]
(2)-3. READ Operations
Set R/W bit = “1” for the READ operation of the AK4588.
After transmission of a data, the master can read next address’s data by generating the acknowledge instead of
terminating the write cycle after the receipt the first data word. After the receipt of each data, the internal 5bits address
counter is incremented by one, and the next data is taken into next address automatically. If the address exceed 1FH
prior to generating the stop condition, the address counter will “roll over” to 00H and the previous data will be
overwritten.
The AK4588 supports two basic read operations: CURRENT ADDRESS READ and RANDOM READ.
ADC/DAC part register can not read.
(2)-3-1. CURRENT ADDRESS READ
The AK4588 has an internal address counter that maintains the address of the last word accessed, incremented by one.
Therefore, if the last access (either a read or write) was to address “n”, the next CURRENT READ operation would
access data from the address “n+1”.
After receipt of the slave address with R/W bit set to “1”, the AK4588 generates an acknowledge, transmits 1byte data
which address is set by the internal address counter and increments the internal address counter by 1. If the master does
not generate an acknowledge to the data but generate the stop condition, the AK4588 discontinues transmission
S
T
A
R
T
SDA
Slave
Address
Data(n)
Data(n+1)
S
Data(n+x) T
O
P
Data(n+2)
P
S
A
C
K
A
C
K
A
C
K
A
C
K
Figure 48. CURRENT ADDRESS READ
(2)-3-2. RANDOM READ
Random read operation allows the master to access any memory location at random. Prior to issuing the slave address
with the R/W bit set to “1”, the master must first perform a “dummy” write operation.
The master issues start condition, slave address(R/W=“0”) and then the register address to read. After the register
address’s acknowledge, the master immediately reissues start condition and the slave address with the R/W bit set to “1”.
Then the AK4588 generates an acknowledge, 1byte data and increments the internal address counter by 1. If the master
does not generate an acknowledge but generate the stop condition, the AK4588 discontinues transmission.
S
T
A
R
T
SDA
Slave
Address
S
T
A
R
T
Word
Address(n)
S
Slave
Address
Data(n)
S
Data(n+x) T
O
P
Data(n+1)
P
S
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
Figure 49. RANDOM READ
MS0287-E-03
2009/05
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[AK4588]
SYSTEM DESIGN
Figure 50 shows the system connection diagram. An evaluation board is available which demonstrates application
circuits, the optimum layout, power supply arrangements and measurement results.
Condition: I2C serial control mode
5
Micro
Controller
(S/PDIF
sources)
S/PDIF sources
S/PDIF out
+
C
NC 62
RX3 63
PVSS 64
R 65
RX4 67
PVDD 66
RX5 69
TEST2 68
RX6 71
CAD0 70
CAD1 72
I2C 74
BOUT
3
TVDD
NC 58
4
DVDD
RX0 57
5
DVSS
RX1 59
6
XTO
7
XTI
VREFH 54
X’tal
8
TEST3
9
MCKO2
VCOM 53
+
0.1u 10u
Analog 5V
0.1u 2.2u
+
RIN 52
AK4588
11 COUT
LIN 51
NC 50
12 UOUT
ROUT1 49
13 VOUT
NC 48
LOUT1 47
14 SDTO2
15 BICK2
NC 46
16 LRCK2
ROUT2 45
17 SDTO1
NC 44
LOUT2 43
18 BICK1
NC 42
Audio DSP
(MPEG/AC3)
MUTE
(Shield)
MUTE
(Shield)
MUTE
(Shield)
MUTE
(Shield)
MUTE
40 NC
ROUT3 41
(Shield)
(Shield)
39 LOUT3
38 NC
(Shield)
MUTE
36 NC
37 ROUT4
MUTE
Micro
Controller
(Shield)
34 DZF1
35 LOUT4
MUTE
33 DZF2
32 MASTER
31 PDN
29 XTL1
30 XTL0
27 SDTI2
28 SDTI1
26 SDTI3
24 DAUX1
23 CSN
22 SDA
20 CDTO
25 SDTI4
19 LRCK1
21 SCL
(Shield)
AVSS 56
AVDD 55
10 MCKO1
(Micro
Controller)
RX7 73
VIN 76
DAUX2 75
MCLK 77
INT1
2
C
Audio DSP
(MPEG/AC3)
TEST1 60
1
(S/PDIF
Source)
Digital 5V
TX1 79
12k
0.1u
+
TX0 78
INT0 80
10u
RX2 61
0.1u
Audio DSP
(MPEG/AC3)
3.3V to 5V
Digital
(Shield)
10u
+
Micro Controller
Digital Ground
Analog Ground
Figure 50. Typical Connection Diagram
Notes:
- “C” depends on the crystal.
- AVSS, DVSS and PVSS must be connected the same analog ground plane.
- Digital signals, especially clocks, should be kept away from the R pin in order to avoid an effect to the clock jitter
performance.
- In case of coaxial input, ground of RCA connector and terminator should be connected to PVSS of the AK4588
with low impedance on PC board.
MS0287-E-03
2009/05
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[AK4588]
1. Grounding and Power Supply Decoupling
The AK4588 requires careful attention to power supply and grounding arrangements. AVDD, DVDD, PVDD and
TVDD are usually supplied from analog supply in system. Alternatively if AVDD, DVDD, PVDD and TVDD are
supplied separately, the power up sequence is not critical. AVSS, DVSS and PVSS of the AK4588 must be connected
to 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 AK4588 as possible,
with the small value ceramic capacitor being the nearest.
2. Voltage Reference Inputs
The voltage of VREFH sets the analog input/output range. The VREFH pin is normally connected to AVDD with a
0.1μF ceramic capacitor. VCOM is a signal ground of this chip. An electrolytic capacitor 2.2μF 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 VREFH and VCOM pins in
order to avoid unwanted coupling into the AK4588.
3. Analog Inputs
ADC inputs are single-ended and internally biased to VCOM. The input signal range scales with the supply voltage and
nominally 0.62 x VREFH Vpp (typ). The ADC output data format is 2’s complement. The DC offset is removed by the
internal HPF.
The AK4588 samples the analog inputs at 64fs. The digital filter rejects noise above the stop band except for multiples
of 64fs. The AK4588 includes an anti-aliasing filter (RC filter) to attenuate a noise around 64fs.
4. Analog Outputs
The analog outputs are also single-ended and centered around the VCOM voltage. The input signal range scales with
the supply voltage and nominally 0.6 x VREFH Vpp. The DAC input data format is 2’s complement. The output voltage
is a positive full scale for 7FFFFFH(@24bit) and a negative full scale for 800000H(@24bit). The ideal output is VCOM
voltage for 000000H(@24bit). The internal analog filters remove most of the noise generated by the delta-sigma
modulator of DAC beyond the audio passband.
DC offsets on analog outputs are eliminated by AC coupling since DAC outputs have DC offsets of a few mV.
MS0287-E-03
2009/05
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[AK4588]
PACKAGE
z
80-pin LQFP
( Unit : mm )
14.0±0.2
12.0±0.2
41
61
40
80
21
12.0±0.2
1
20
0.08
0.125+0.10
-0.05
0.50±0.1
0.10
M
+0.15
0.10 -0.10
0.50
1.25TYP
1.85MAX
0° ~ 10°
0.20±0.1
1.40±0.2
14.0±0.2
60
■ Material & Lead finish
Package:
Epoxy
Lead-frame: Copper
Lead-finish Soldering (Pb free) plate
MS0287-E-03
2009/05
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[AK4588]
MARKING
AK4588VQ
XXXXXXX
1) Pin #1 indication
2) Date Code: XXXXXXX(7 digits)
3) Marking Code: AK4588VQ
4) Asahi Kasei Logo
REVISION HISTORY
Date (YY/MM/DD)
04/01/22
04/03/18
08/05/22
Revision
00
01
02
Reason
First Edition
Error Correct
Spec Change
09/05/25
03
Error Correct
Page
Contents
12
ADC Digital Filter, Group Delay: 19.1/fs → 16/fs
Ambient Temperature range was changed.
“-10 ∼ +70°C” → “-40 ∼ +85°C”
■ Handling of Unused Pin
The treatment of TEST3 pin was changed. (to
DVSS)
9
MS0287-E-03
2009/05
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[AK4588]
IMPORTANT NOTICE
z These products and their specifications are subject to change without notice.
When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei
EMD Corporation (AKEMD) or authorized distributors as to current status of the products.
z AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights in the application
or use of any information contained herein.
z 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.
z AKEMD products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support,
or other hazard related device or systemNote2), and AKEMD assumes no responsibility for such use, except for the
use approved with the express written consent by Representative Director of AKEMD. As used here:
Note1) 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.
Note2) 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.
z It is the responsibility of the buyer or distributor of AKEMD products, who distributes, disposes of, or otherwise
places the product with a third party, to notify such third 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 AKEMD harmless from
any and all claims arising from the use of said product in the absence of such notification.
MS0287-E-03
2009/05
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