AD AD1980

a
AC ’97 SoundMAX Codec
AD1980
®
FEATURES
AC ’97 2.3 COMPATIBLE FEATURES
6 DAC Channels for 5.1 Surround
S/PDIF Output
Integrated Stereo Headphone Amplifier
Variable Rate Audio
Double Rate Audio (fS = 96 kHz)
Greater than 90 dB Dynamic Range
20-Bit PCM DACs
Line-Level Mono ”Phone” Input
High Quality CD Input
Selectable MIC Input with Preamp
AUX and Line_In Stereo Inputs
External Amplifier Power-Down Control
Power Management Modes
48-Lead LQFP Package
ENHANCED FEATURES
Integrated Parametric Equalizer
Stereo MIC Preamp Support
Integrated PLL for System Clocking
Variable Sample Rate 7 kHz to 96 kHz
Jack Sense (Auto Topology Switching)
Software Controlled VREF_OUT for MIC Bias
Software Enabled Outputs for Jack Sharing
Auto Down-Mix and Channel Spreading Modes
FUNCTIONAL BLOCK DIAGRAM
VREF
VREFOUT
MS
AD1980
VOLTAGE
REFERENCE
G
MIC PREAMP
G
MC2
CODEC CORE
PCM L/R
ADC RATE
PHONE_IN
RECORD
SELECTOR
CD_L
CD_GND
SPDIF
TX
G
2CMIC
MC1
XTL_OUT XTL_IN SPDIF
CD
DIFF AMP
CD_R
AUX_L
G
M
16-BIT
⌺-⌬ ADC
G
M
16-BIT
⌺-⌬ ADC
PLL
ID0
ID1
AUX_R
LINE_IN_L
PCM LFE
DAC RATE
M
G
20-BIT
⌺-⌬ DAC
GA
SURR_OUT_L/
HP_OUT_L
SURR_OUT_R/
HP_OUT_R
A
MZ
HP
HP
LOSEL
MZ
A
M
M
M
M
M
GA
M
M
GA
GA
M
M
M
A
A
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH Z
GA
GA
M
M
M
PCM FRONT
DAC RATE
M
LOSEL
LINE_OUT_R
A
HPSEL
MONO_OUT
MZ
HPSEL
LINE_OUT_L
GA
GA
AC '97 INTERFACE
A
G
M
G
20-BIT
⌺-⌬ DAC
M
G
20-BIT
⌺-⌬ DAC
M
G
20-BIT
⌺-⌬ DAC
M
G
20-BIT
⌺-⌬ DAC
M
M
PCM SURR
DAC RATE
EQ
EQ
SYNC
BITCLK
SDATA_OUT
EQ COEF STORAGE
MZ
M
BYPASS
A
RESET
DAC
SLOT
LOGIC
BYPASS
CENTER_OUT
MZ
SPRD
LFE_OUT
20-BIT
⌺-⌬ DAC
SPRD
LINE_IN_R
SDATA_IN
AC '97
CONTROL
REGISTERS
ANALOG MIXING
CONTROL LOGIC
JS0
JS1
EAPD
EAPD
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2002 Analog Devices, Inc. All rights reserved.
AD1980–SPECIFICATIONS
STANDARD TEST CONDITIONS, UNLESS OTHERWISE
NOTED
Temperature
Digital Supply (DVDD)
Analog Supply (AVDD)
Sample Rate (fS)
Input Signal
Analog Output Pass Band
DAC Test Conditions
Calibrated
–3 dB Attenuation Relative to Full Scale
0 dB Input
10 kΩ Output Load LINE_OUT, MONO_OUT,
CENTER_OUT, and LFE_OUT
32 Ω Output Load (HP_OUT)
25°C
3.3 V
5.0 V
48 kHz
1008 Hz
20 Hz to 20 kHz
ADC Test Conditions
Calibrated
0 dB Gain
Input –3.0 dB Relative to Full Scale
Parameter
Min
ANALOG INPUT
Input Voltage (rms Values Assume Sine Wave Input)
LINE_IN, CD, AUX, PHONE_IN
Typ
1
2.83
0.032
0.089
0.1
0.283
0.316
0.894
1
2.83
20
5
MIC_IN with 30 dB Preamp
MIC_IN with 20 dB Preamp
MIC_IN with 10 dB Preamp
MIC_IN with 0 dB Gain
Input Impedance*
Input Capacitance*
MASTER VOLUME
Step Size (Line Out, Mono Out, Surround Out, Center, LFE)
Output Attenuation Range Span*
Mute Attenuation of 0 dB Fundamental*
Max
Unit
7.5
V rms
V p-p
V rms
V p-p
V rms
V p-p
V rms
V p-p
V rms
V p-p
kΩ
pF
80
dB
dB
dB
1.5
46.5
PROGRAMMABLE GAIN AMPLIFIER—ADC
Step Size (0 dB to 22.5 dB)
PGA Gain Range Span
1.5
22.5
dB
dB
ANALOG MIXER—INPUT GAIN/AMPLIFIERS/ATTENUATORS
Signal-to-Noise Ratio (SNR)
CD to LINE_OUT
LINE, AUX, PHONE, to LINE_OUT*
MIC1 or MIC2 (Note: MIC Gain of 0 dB) to LINE_OUT*
Step Size All Mixer Inputs
Input Gain/Attenuation Range: All Mixer Inputs
90
90
90
1.5
46.5
dB
dB
dB
dB
dB
DIGITAL DECIMATION AND INTERPOLATION FILTERS*
Pass Band
Pass-Band Ripple
Transition Band
Stop Band
Stop-Band Rejection
Group Delay
Group Delay Variation over Pass Band
–2–
0.4 fS
± 0.09
0.6 fS
0
0.4 fS
0.6 fS
–74
16/fS
0
Hz
dB
Hz
Hz
dB
sec
µs
REV. 0
AD1980
Parameter
Min
ANALOG-TO-DIGITAL CONVERTERS
Resolution
Total Harmonic Distortion (THD) AVDD = 5.0 V
Dynamic Range (–60 dB Input THD + N Referenced to FS, A-Weighted)
AVDD = 5.0 V
Signal-to-Intermodulation Distortion* (CCIF Method)
ADC Crosstalk*
Line Inputs (Input L, Ground R, Read R; Input R, Ground L, Read L)
LINE_IN to Other
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors)
ADC Offset Error* (0 dB Gain, HPF On)
dB
–3–
dB
dB
%
dB
mV
Bits
dB
dB
dB
dB
dB
%
dB
dB
–40
dB
1
2.83
V rms
V p-p
Ω
800
10
15
100
1
2.25
2.25
3.65
2.45
5
±5
0.35 DVDD
0.9 DVDD
*Guaranteed but not tested.
Specifications subject to change without notice.
–90
–85
± 10
± 0.5
± 10
± 10
± 0.7
–80
0.65 DVDD
POWER SUPPLY
Power Supply Range; Analog (AVDD)
Power Supply Range; Digital (DVDD)
Power Dissipation 5 V/3.3 V
Analog Supply Current 5 V (AVDD)
Digital Supply Current 3.3 V (DVDD)
Power Supply Rejection (100 mV p-p Signal @ 1 kHz)*
(At Both Analog and Digital Supply Pins, Both ADCs and DACs)
REV. 0
84
88
32
2.05
Unit
Bits
dB
dB
20
–90
–73
–82.5
90
ANALOG OUTPUT
Full-Scale Output Voltage; LINE_OUT/MONO_OUT, CENTER_OUT,
LFE_OUT
STATIC DIGITAL SPECIFICATIONS
High Level Input Voltage (VIH): Digital Inputs
Low Level Input Voltage (VIL)
High Level Output Voltage (VOH), IOH = 2 mA
Low Level Output Voltage (VOL), IOL = 2 mA
Input Leakage Current
Output Leakage Current
Max
16
–78
82
–95
–90
DIGITAL-TO-ANALOG CONVERTERS
Resolution
Total Harmonic Distortion (THD), LINE_OUT, AVDD = 5.0 V
Total Harmonic Distortion (THD), HP_OUT, AVDD = 5.0 V
Total Harmonic Distortion (THD), CENTER/LFE, AVDD = 5.0 V
Dynamic Range (–60 dB Input THD + N Referenced to FS A-Weighted)
AVDD = 5.0 V
Signal-to-Intermodulation Distortion* (CCIF Method)
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
Interchannel Gain Mismatch (Difference of Gain Errors)
DAC Crosstalk (Input L, Zero R, Read LINE_OUT_R; Input R,
Zero L, Read LINE_OUT_L, 10 kΩ Load)*
Total Audible Out-of-Band Energy* (Measured from 0.6 fS to 20 kHz)
Output Impedance*
External Load Impedance* (LINE_OUT, CENTER_OUT/LFE_OUT,
MONO_OUT)
Output Capacitance*
External Load Capacitance*
Full-Scale Output Voltage; HP_OUT (0 dB Gain)
External Load Impedance*; HP_OUT
VREF
VREF_OUT (VREFH = 0)
VREF_OUT (VREFH = 1)
VREF_OUT Current Drive
Mute Click (Muted Output Minus Unmuted Midscale DAC Output)
Typ
–10
–10
0.1 DVDD
+10
+10
4.75
3.15
5.25
3.45
563
70
53
40
kΩ
pF
pF
V rms
Ω
V
V
V
mA
mV
V
V
V
V
µA
µA
V
V
mW
mA
mA
dB
AD1980
Parameter
PR[K:I]1
PR[6:0]1
DVDD Typ
AVDD Typ
Unit
000
000
000
010
101
111
000
000
111
111
111
000
000 0000
000 0001
000 0010
000 0000
000 0000
000 0011
000 0100
000 0101
000 0110
000 0111
011 1111
100 0000
53
44
46
46
46
12
52
45
31
12
0
52
70
66
61
61
61
33
44
39
14
8
0
65
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
2
POWER-DOWN STATES
Fully Active
ADC
FRONT DAC
SURROUND DAC
CENTER/LFE DAC
ADC + ALL DACs
Mixer
ADC + Mixer
ALL DACs + Mixer
ADC + ALL DACs + Mixer
Standby
Headphone Standby
NOTES
1
PR bits are controlled in Reg. 2Ah and 26h
2
Values presented with V REFOUT loaded.
Specifications subject to change without notice.
Parameter
Min
Typ
40
24.576
14.31818
48.000
50
Max
Unit
60
MHz
MHz
MHz
%
*
CLOCK SPECIFICATIONS
Input Clock Frequency (XTAL Mode or Clock Oscillator)
Input Clock Frequency (Reference Clock Mode)
Input Clock Frequency (USB Clock Mode)
Recommended Clock Duty Cycle
*
Guaranteed but not tested.
Specifications subject to change without notice.
TIMING PARAMETERS (Guaranteed over Operating Temperature Range)
Parameter
Symbol
RESET Active Low Pulsewidth
RESET Inactive to BIT_CLK Startup Delay
SYNC Active High Pulsewidth
SYNC Low Pulsewidth
SYNC Inactive to BIT_CLK Startup Delay
BIT_CLK Frequency
BIT_CLK Frequency Accuracy
BIT_CLK Period
BIT_CLK Output Jitter1, 2
BIT_CLK High Pulsewidth
BIT_CLK Low Pulsewidth
SYNC Frequency
SYNC Period
Setup to Falling Edge of BIT_CLK
Hold from Falling Edge of BIT_CLK
BIT_CLK Rise Time
BIT_CLK Fall Time
SYNC Rise Time
SYNC Fall Time
SDATA_IN Rise Time
SDATA_IN Fall Time
SDATA_OUT Rise Time
SDATA_OUT Fall Time
End of Slot 2 to BIT_CLK, SDATA_IN Low
Setup to RESET Inactive (SYNC, SDATA_OUT)
Rising Edge of RESET to Hi-Z Delay
Propagation Delay
RESET Rise Time
Output Valid Delay from BIT_CLK Rising
tRST_LOW
tRST2CLK
tSYNC_HIGH
tSYNC_LOW
tSYNC2CLK
Min
Typ
1.0
162.8
400,000
1.3
19.5
162.8
12.288
tSYNC_PERIOD
tSETUP
tHOLD
tRISECLK
tFALLCLK
tRISESYNC
tFALLSYNC
tRISEDIN
tFALLDIN
tRISEDOUT
tFALLDOUT
tS2_PDOWN
tSETUP2RST
tOFF
1.0
81.4
750
tCLK_PERIOD
tCLK_HIGH
tCLK_LOW
Max
40
39.7
41.7
41.4
48.0
20.8
4
3
2
2
2
2
2
2
2
2
0
15
4
4
4
4
4
4
4
4
6
6
6
6
6
6
6
6
1.0
25
15
50
15
Unit
µs
ns
µs
µs
ns
MHz
ppm
ns
ps
ns
ns
kHz
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
ns
NOTES
1
Guaranteed but not tested.
2
Output jitter directly dependent on crystal input jitter.
Specifications subject to change without notice.
–4–
REV. 0
AD1980
tRST2CLK
tRST_LOW
RESET
tTRI2ACTV
BIT_CLK
tTRI2ACTV
SDATA_IN
Figure 1. Cold Reset Timing (Codec is Supplying the Bit_CLK Signal)
tSYNC_HIGH
tSYNC2CLK
SYNC
BIT_CLK
Figure 2. Warm Reset Timing
tCLK_LOW
SLOT 1
SLOT 2
WRITE TO
0ⴛ26
DATA
PR4
SYNC
BIT_CLK
tCLK_HIGH
BIT_CLK
tCLK_PERIOD
SDATA_OUT
tSYNC_LOW
tS2_PDOWN
SDATA_IN
SYNC
BIT_CLK NOT TO SCALE
tSYNC_HIGH
tSYNC_PERIOD
Figure 5. AC-Link Low Power Mode Timing
Figure 3. Clock Timing
tCO
tSETUP
BIT_CLK
tRISECLK
tFALLCLK
BIT_CL
SYNC
VIH
VIL
SDATA_O
tRISESYNC
SDATA_I
tFALLSYNC
SYN
VOH
VOL
tHOLD
SDATA_IN
tRISEDIN
Figure 6. AC-Link Low Power Mode Timing
tFALLDIN
RESET
SDATA_OUT
tRISEDOUT
tFALLDOUT
SDATA_OUT
tSETUP2RST
Figure 4. Signal Rise and Fall Times
SDATA_IN, BIT_CLK,
EAPD, SPDIF_OUT
AND DIGITAL I/O
Hi-Z
tOFF
Figure 7. ATE Test Mode
REV. 0
–5–
AD1980
ENVIRONMENTAL CONDITIONS*
ABSOLUTE MAXIMUM RATINGS*
Parameter
Power Supplies
Digital (DVDD)
Analog (AVDD)
Input Current (Except Supply Pins)
Analog Input Voltage (Signal Pins)
Digital Input Voltage (Signal Pins)
Ambient Temperature (Operating)
Storage Temperature
Min
Max
Unit
–0.3
–0.3
+3.6
+6.0
± 10.0
AVDD + 0.3
DVDD + 0.3
70
+150
V
V
mA
V
V
°C
°C
–0.3
–0.3
0
–65
Ambient Temperature Rating
TCASE = Case Temperature in °C
PD = Power Dissipation in W
JA = Thermal Resistance (Junction-to-Ambient)
JC = Thermal Resistance (Junction-to-Case)
Package
␪JA
␪JC
LQFP
50.1°C/W
17.8°C/W
*All measurements per EIA/JESD51 with 2S2P
test board per EIA/JESD51-7.
*Stresses greater than those listed under Absolute Maximum Ratings may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in
the operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option*
AD1980JST
0°C to 70°C
48-Lead LQFP
ST-48
*ST = Low Profile Quad Flatpack
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
AD1980 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
DVDD1
AVDD2
MONO_OUT
44
SURR_OUT_L/HP_OUT_L
AVSS3
45
AVSS2
ID0
46
SURR_OUT_R/HP_OUT_R
ID1
47
AVDD3
EAPD
48
NC
SPDIF
PIN CONFIGURATION
48-Lead LQFP
43
42
41
40
39
38
37
1
36 LINE_OUT_R (FRONT_R)
XTL_IN 2
35 LINE_OUT_L (FRONT_L)
XTL_OUT
3
34 AVDD4
DVSS1
4
33 AVSS4
SDATA_OUT
5
BIT_CLK
6
AD1980
DVSS2
7
TOP VIEW
(Not to Scale)
32 LFE_OUT
31 CENTER_OUT
30 AFILT2
SDATA_IN 8
DVDD2
29 AFILT1
28 VREFOUT
9
27 VREF
SYNC 10
13
14
15
16
17
18
19
20
21
22
23
24
JS1
JS0
CD_L
CD_GND_REF
CD_R
MC1
MC2
LINE_IN_L
LINE_IN_R
NC = NO CONNECT
AUX_R
25 AVDD1
AUX_L
26 AVSS1
NC 12
PHONE_IN
RESET 11
–6–
REV. 0
AD1980
PIN FUNCTION DESCRIPTIONS
Pin Number
Mnemonic
I/O
Function
Crystal Input (24.576 MHz) or External Clock In (24.576 MHz,
14.31818 MHz or 48000 MHz)
Crystal Output
AC-Link Serial Data Output. AD1980 Input Stream.
AC-Link Bit Clock. 12.288 MHz serial data clock. (Input pin, for
Secondary mode only.)
AC-Link Serial Data Input. AD1980 Output Stream.
AC-Link Frame Sync
AC-Link Reset. AD1980 Master H/W Reset.
SPDIF Output
DIGITAL INPUT/OUTPUT
2
XTL_IN
I
3
5
6
XTL_OUT
SDATA_OUT
BIT_ CLK
O
I
O/I
8
10
11
48
SDATA_IN
SYNC
RESET
SPDIF
O
I
I
O
CHIP SELECTS/CLOCK STRAPPING
45
ID0
I
46
ID1
I
Chip Select Input 0 (Active Low). This pin can also be used as the
chain input from a secondary Codec.
Chip Select Input 1 (Active Low)
O
I
I
EAPD Output
Jack Sense 0 Input
Jack Sense 1 Input
PHONE_IN
AUX_L
AUX_R
CD_L
CD_GND_REF
CD_ R
MIC1
MIC2
LINE_IN_L
LINE_IN_R
CENTER_OUT
LFE_OUT
LINE_OUT_L
LINE_OUT_R
MONO_OUT
SURR_OUT_L/HP_OUT_L
SURR_OUT_R/HP_OUT_R
I
I
I
I
I
I
I
I
I
I
O
O
O
O
O
O
O
Monaural Line-Level Input
Auxiliary Input, Left Channel
Auxiliary Input, Right Channel
CD Audio Left Channel
CD Audio Analog Ground Reference for Differential CD Input
CD Audio Right Channel
Microphone #1 Input (Left Channel when 2-Channel Mode Selected)
Microphone #2 Input (Right Channel when 2-Channel Mode Selected)
Line-In Left Channel
Line-In Right Channel
Center Channel Output
Low Frequency Enhanced Output
Line-Out (Front) Left Channel
Line-Out (Front) Right Channel
Monaural Output to Telephone Subsystem Speakerphone
Surround or Front Headphone Left Channel Output
Surround or Front Headphone Right Channel Output
VREF
VREFOUT
AFILT1
AFILT2
O
O
O
O
Voltage Reference Filter
Voltage Reference Output 5 mA Drive (intended for MIC bias)
Antialiasing Filter Capacitor—ADC Right Channel
Antialiasing Filter Capacitor—ADC Left Channel
JACK SENSE AND EAPD
47
17
16
EAPD
JS0
JS1
ANALOG INPUT/OUTPUT
13
14
15
18
19
20
21
22
23
24
31
32
35
36
37
39
41
FILTER/REFERENCE
27
28
29
30
REV. 0
–7–
AD1980
Pin Number
Mnemonic
POWER AND GROUND SIGNALS
1
DVDD1
4
DVSS1
7
DVSS2
9
DVDD2
25
AVDD1
26
AVSS1
33
AVSS4
34
AVDD4
38
AVDD2
40
AVSS2
43
AVDD3
44
AVSS3
NO CONNECTS
12
42
NC
NC
I/O
Function
I
I
I
I
I
I
I
I
I
I
I
I
Digital VDD 3.3 V
Digital GND
Digital GND
Digital VDD 3.3 V
Analog VDD 5.0 V
Analog GND
Analog GND
Analog VDD 5.0 V
Analog VDD 5.0 V
Analog GND
Analog VDD 5.0 V
Analog GND
No Connect
No Connect
–8–
REV. 0
AD1980
Indexed Control Registers
Reg Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
00h Reset
X
SE4
SE3
SE2
SE1
SE0
ID9
ID8
ID7
ID6
ID5
ID4
ID3
ID2
ID1
ID0
0090h
02h Master Volume
MM
X
LMV5
LMV4
LMV3
LMV2
LMV1 LMV0
MMRM* X
RMV5 RMV4 RMV3 RMV2 RMV1 RMV0
8000h
04h Headphone
Volume
HPM
X
LHV5
LHV4
LHV3
LHV2
LHV1
LHV0
HPRM*
X
RHV5
RHV4
RHV3
8000h
06h Mono Volume
MVM
X
X
X
X
X
X
X
X
X
MV5
MV4
MV2
MV2
MV1
MV0
8000h
0Ch Phone Volume
PHM
X
X
X
X
X
X
X
X
X
X
PHV4
PHV3
PHV2
PHV1
PHV0
8008h
0Eh Mic Volume
MCM
X
X
X
X
X
X
X
X
M20
X
MCV4 MCV3 MCV2 MCV1 MCV0
8008h
10h Line In Volume
LVM
X
X
LLV4
LLV3
LLV2
LLV1
LLV0
LVRM*
X
X
RLV4
8808h
RLV3
RHV2
RLV2
RHV1
RLV1
RHV0
RLV0
12h CD Volume
CVM
X
X
LCV4
LCV3
LCV2
LCV1
LCV0
CDRM* X
X
RCV4
RCV3
RCV2
RCV1
RCV0
8808h
16h AUX Volume
AVM
X
X
LAV4
LAV3
LAV2
LAV1
LAV0
AVRM*
X
X
RAV4
RAV3
RAV2
RAV1
RAV0
8808h
18h PCM Out Vol
OM
X
X
LOV4
LOV3
LOV2
LOV1
LOV0
OMRM* X
X
ROV4
ROV3
ROV2
ROV1
ROV0
8808h
1Ah Record Select
X
X
X
X
X
LS2
LS1
LS0
X
X
X
X
X
RS2
RS1
RS0
0000h
1Ch Record Gain
IM
X
X
X
LIM3
LIM2
LIM1
LIM0
IMRM
X
X
X
RIM3
RIM2
RIM1
RIM0
8000h
20h General Purpose X
X
X
X
DRSS1
DRSS0
X
MS
LPBK
X
X
X
X
X
X
X
0000h
24h Audio Int.
and Paging
I4
X
X
X
I0
X
X
X
X
X
X
X
PG3
PG2
PG1
PG0
xxxx
26h Power-Down
Ctrl/Stat
EAPD
PR6
PR5
PR4
PR3
PR2
PR1
PR0
X
X
X
X
REF
ANL
DAC
ADC
0NA
28h Ext’d Audio ID
ID1
ID0
X
X
REV1
REV0
AMAP LDAC
SDAC
CDAC
DSA1
DSA0
X
SPDIF DRA
VRAS
x3C7h
2Ah Ext’d Audio
Stat/Ctrl
VFORCE X
PRK
PRJ
PRI
SPCV
X
ELDAC ESDAC
ECDAC SPSA1 SPSA0 X
ESPDIF EDRA EVRA
0xx0h
2Ch PCM Front
DAC Rate
SRF15
SRF14
SRF13
SRF12
SRF11
SRF10
SRF9
SRF8
SRF7
SRF6
SRF5
SRF4
SRF3
SRF2
SRF1
SRF0
BB80h
2Eh PCM Surr
DAC Rate
SRS15
SRS14
SRS13
SRS12
SRS11
SRS10
SRS9
SRS8
SRS7
SRS6
SRS5
SRS4
SRS3
SRS2
SRS1
SRS0
BB80h
30h PCM C/LFE
DAC Rate
SRCL15 SRCL14 SRCL13 SRCL12 SRCL11 SRCL10 SRCL9 SRCL8
SRCL7
SRCL6
SRCL5 SRCL4 SRCL3 SRCL2 SRCL1 SRCL0
BB80h
32h PCM
ADC Rate
SRA15
SRA14
SRA13
SRA13
SRA11
SRA10
SRA9
SRA8
SRA7
SRA6
SRA5
BB80h
36h Center/LFE
Volume
LM
X
LFE5
LFE4
LFE3
LFE2
LFE1
LFE0
CM
X
CNT5 CNT4 CNT3 CNT2 CNT1 CNT0
38h Surround Volume MUTE_L X
LSR5
LSR4
LSR3
LSR2
LSR1
LSR0
MUTE_R X
RSR5
RSR4
RSR3
RSR2
RSR1
RSR0
8080h
3Ah SPDIF Control
V
X
SPSR1
SPSR0
L
CC6
CC5
CC4
CC3
CC2
CC1
CC0
PRE
COPY /AUD
PRO
2000h
60h EQ CTRL
EQM
X
X
X
X
X
X
X
SYM
CHS
BCA5
BCA4
BCA3
BCA2
BCA1
BCA0
8080h
SRA4
SRA3
SRA2
SRA1
SRA0
8080h
62h EQ DATA
CFD15
CFD14
CFD13
CFD12
CFD11
CFD10
CFD9
CFD8
CFD7
CFD6
CFD5
CFD4
CFD3
CFD2
CFD1
CFD0
0000h
72h JACK SENSE
JS1
SPRD
JS1
DMX
JS0
DMX
JS
MT2
JS
MT1
JS
MT0
JS1
EQB
JS0
EQB
JS1
TMR
JS0
TMR
JS1
MD
JS0
MD
JS1
ST
JS0
ST
JS1
INT
JS0
INT
0000h
74h Serial
Configuration
SLOT 16 REGM2 REGM1 REGM0 REGM3 DRF
X
CHEN
X
LBK1
LBK0
INTS
X
SPAL
SPDZ
SPLNK
1001h
76h Misc Control
Bits
DACZ
AC97NC MSPLT LODIS
CLDIS
HPSEL
DMIX1 DMIX0 SPRD
2CMIC LOSEL SRU
VREFH VREFD MBG1 MBG0
0000h
7Ch Vendor ID1
F7
F6
F5
F4
F3
F2
F1
F0
S7
S6
S5
S4
S3
S2
S1
S0
4144h
7Eh Vendor ID2
T7
T6
T5
T4
T3
T2
T1
T0
REV7
REV6
REV5
REV4
REV3
REV2
REV1
REV0
5370h
NOTES
All registers not shown and bits containing an X are assumed to be reserved.
Odd register addresses are aliased to the next lower even address.
Reserved registers should not be written to.
Zeros should be written to reserved bits.
*For AC ’97 compatibility, Bit D7 is only available by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right
channels. If MSPLT is not set, Bit D7 has no effect.
REV. 0
–9–
AD1980
Reset Register (Index 00h)
Reg
No.
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
00h
Reset
X
SE4
SE3
SE2
SE1
SE0
ID9
ID8
ID7
ID6
ID5
ID4
ID3
ID2
ID1
ID0
0090h
NOTES
All registers not shown and bits containing an X are assumed to be reserved.
Writing any value to this register performs a register reset, which causes all registers to revert to their default values (except 74h, which forces the serial configuration).
Reading this register returns the ID code of the part and a code for the type of 3D Stereo Enhancement.
ID[9:0] Identify Capability. The ID decodes the capabilities of AD1980 based on the following:
Bit = 1
Function
AD1980
ID0
ID1
ID2
ID3
ID4
ID5
ID6
ID7
ID8
ID9
Dedicated Mic PCM In Channel
Modem Line Codec Support
Bass and Treble Control
Simulated Stereo (Mono to Stereo)
Headphone Out Support
Loudness (Bass Boost) Support
18-Bit DAC Resolution
20-Bit DAC Resolution
18-Bit ADC Resolution
20-Bit ADC Resolution
0
0
0
0
1
0
0
1
0
0
SE[4:0] Stereo Enhancement. The AD1980 does not provide hardware 3D stereo enhancement. (All bits are zeros.)
Master Volume Register (Index 02h)
Reg
No.
02h
Name
D15
Master MM
Volume
D14 D131
X
D12
D11
D10
D9
D8
D6 D51
D7
2
LMV5 LMV4 LMV3 LMV2 LMV1 LMV0 MMRM X
D4
D3
D2
D1
D0
Default
RMV5 RMV4 RMV3 RMV2 RMV1 RMV0 8000h
NOTES
1
Refer to Table I for examples. This register controls the Line_Out volume controls for both stereo channels and mute bit. Each volume subregister contains five bits,
generating 32 volume levels with 31 steps of 1.5 dB each. Because AC ’97 defines 6-bit volume registers, to maintain compatibility whenever the D5 or D13 bits are
set to “1,” their respective lower five volume bits are automatically set to “1” by the codec logic. On readback, all lower five bits will read “1s” whenever these bits are set
to “1.”
2
For AC ’97 compatibility, Bit D7 is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right channels.
If MSPLT is not set, bit D7 has no effect. All registers not shown and bits containing an X are assumed to be reserved.
Note that depending on the state of the AC97NC bit in Register 0x76, this register has the following additional functionality:
For AC97NC = 0, the register controls the Line_out output Attenuators only.
For AC97NC = 1, the register controls the Line_out, Center, and LFE output Attenuators.
RMV[5:0]
Right Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from
0 dB to a maximum attenuation of 46.5 dB.
RM
Right Channel Mute. Once enabled by the MSPLT bit in Register 76h, this bit mutes the right channel separately
from the MM bit. Otherwise this bit will always read “0” and will have no effect when set to “1.”
LMV[5:0]
Left Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from 0 dB
to a maximum attenuation of 46.5 dB.
MM
Headphones Volume Mute. When this bit is set to “1,” both the left and the right channels are muted, unless the
MSPLT bit in Register 76h is set to “1.”
–10–
REV. 0
AD1980
Headphones Volume Register (Index 04h)
Reg
No. Name
D15
D14
D13
04h
HPM
X
LHV5 LHV4 LHV3 LHV2 LHV1 LHV0 HPRM* X
Headphones
Volume
D12
D11
D10
D9
D8
D7
D6 D5
D4
D3
D2
RHV5 RHV4 RHV3 RHV2
D1
D0
Default
RHV1 RHV0 8000h
*For AC ’97 compatibility, Bit D7 is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right
channels. If MSPLT is not set, Bit D7 has no effect.
Table I. Volume Settings for Master and Headphone
Control Bits
Master Volume (02h) and Headphone Volume (04h)
Reg. 76h
Left Channel Volume D[13:8]
Right Channel Volume D[5:0]
MSPLT* D15 WRITE
READBACK Function
D7*
WRITE READBACK
Function
0
0
00 0000
00 0000
0 dB Gain
x
00 0000
00 0000
0 dB Gain
0
0
00 1111
00 1111
–22.5 dB Gain
x
00 1111
00 1111
–22.5 dB Gain
0
0
01 1111
01 1111
–46.5 dB Gain
x
01 1111
01 1111
–46.5 dB Gain
0
0
1x xxxx
01 1111
–46.5 dB Gain
x
1x xxxx
01 1111
–46.5 dB Gain
0
1
xx xxxx
xx xxxx
– dB Gain, Muted
x
xx xxxx
xx xxxx
– dB Gain, Muted
1
0
1x xxxx
01 1111
–46.5 dB Gain
1
xx xxxx
xx xxxx
– dB Gain, only
Right Muted
1
1
xx xxxx
xx xxxx
– dB Gain, Left only Muted
0
xx xxxx
xx xxxx
–46.5 dB Gain
1
1
xx xxxx
xx xxxx
– dB Gain, Left Muted
1
xx xxxx
xx xxxx
– dB Gain, Right
Muted
*For AC ’97 compatibility, Bit D7 is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right
channels. If MSPLT is not set, Bit D7 has no effect.
x in the above table is “don’t care.”
Mono Volume Register (Index 06h)
Reg
No. Name
06h
D15
Mono Volume MVM
D14 D13
D12
D11
D10
D9
D8
D7
D6
D5*
D4
D3
D2
D1
D0
Default
X
X
X
X
X
X
X
X
MV5
MV4
MV3
MV2
MV1
MV0
8000h
X
*Refer to Table II for examples. This register controls the Mono output volume and mute bit. The volume register contains five bits, generating 32 volume levels with
31 steps of 1.5 dB each. Because AC ’97 defines 6-bit volume registers, to maintain compatibility, whenever the D5 bit is set to “1,” their respective lower five volume bits are automatically set to “1” by the codec logic. On readback, all lower five bits will read “1s” whenever this bit is set to “1.” All registers not shown and bits
containing an X are assumed to be reserved.
MV[5:0]
Mono Volume Control. The least significant bit represents 1.5 dB. This register controls the output from 0 dB to a
maximum attenuation of 46.5 dB.
MVM
Mono Volume Mute. When this bit is set to “1,” the channel is muted.
Table II. Volume Settings for Mono
Control Bits D[4:0] for Mono (06h)
D15
WRITE
READBACK
Function
0
0
0
1
0 0000
0 1111
1 1111
x xxxx
0 0000
0 1111
1 1111
x xxxx
0 dB Gain
–22.5 dB Gain
–46.5 dB Gain
– dB Gain, Muted
x in the above table is a wild card and has no effect on the value.
REV. 0
–11–
AD1980
Phone_in Volume Register (Index 0Ch)
Reg
No. Name
D15
D14 D13
0Ch Phone_in Volume PHM X
X
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
X
X
X
X
X
PHV4
PHV3
PHV2
PHV1 PHV0
Default
8008h
All registers not shown and bits containing an X are assumed to be reserved. Refer to Table III for examples.
PHV[4:0]
Phone Volume. Allows setting the Phone Volume attenuator in 32 volume levels with 31 steps of 1.5 dB each. The
LSB represents 1.5 dB, and the gain range is +12 dB to –34.5 dB. The default value is 0 dB, with the mute bit enabled.
PHM
Phone Mute. When this bit is set to “1,” the Phone channel is muted.
MIC Volume Register (Index 0Eh)
Reg
No. Name
D15
D14 D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
0Eh MIC Volume
MCM
X
X
X
X
X
X
X
M20
X
MCV4
MCV3
MCV2
MCV1 MCV0 8008h
X
D0
Default
All registers not shown, and bits containing an X are assumed to be reserved. Refer to Table III for examples.
MCV[4:0]
MIC Volume Gain. Allows setting the MIC Volume attenuator in 32 volume levels. The LSB represents 1.5 dB,
and the gain range is +12 dB to –34.5 dB. The default value is 0 dB, with mute enabled.
M20
MIC Gain Boost. This bit allows setting additional MIC gain to increase the microphone sensitivity. The nominal
gain boost by default is 20 dB, however, Bits D0 and D1 (MBG[1:0]) on the miscellaneous control bits register
(76h) allow changing the gain boost to 10 dB or 30 dB, if necessary.
0 = Disabled; Gain = 0 dB
1 = Enabled; Default Gain = 20 dB (see Register 76h, Bits D0, D1)
MCM
MIC Mute. When this bit is set to “1,” the channel is muted.
Table III. Volume Settings for Phone and MIC
Control Bits D[4:0]
Phone (0Ch) and MIC (0Eh)
D15
WRITE
READBACK
Function
0
0
0
1
0 0000
0 1000
1 1111
x xxxx
0 0000
0 1000
1 1111
x xxxx
12 dB Gain
0 dB Gain
–34.5 dB Gain
– dB Gain, Muted
x in the above table is a wild card, and has no effect on the value.
–12–
REV. 0
AD1980
Line-In Volume Register (Index 10h)
Reg
No. Name
D15
10h Line-In Volume LVM
D14 D13 D12
X
X
D11
LLV4 LLV3
D10
D9
D8
LLV2
LLV1 LLV0
D7
D6 D5 D4
LVRM* X
X
D3
RLV4 RLV3
D2
D1
D0
Default
RLV2
RLV1 RLV0 8808h
*For AC ’97 compatibility, Bit D7 is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right channels.
If MSPLT is not set, the Bit D7 has no effect. All registers not shown and bits containing an X are assumed to be reserved. Refer to Table IV for examples.
RLV[4:0]
Right Line-In Volume. Allows setting the Line-In Right channel attenuator in 32 volume levels with 31 steps of
1.5 dB each. The LSB represents 1.5 dB, and the range is +12 dB to –34.d dB. The default value is 0 dB, mute enabled.
RM
Right Channel Mute. Once enabled by the MSPLT bit in Register 76h, this bit mutes the right channel separately
from the LIM bit. Otherwise, this bit will always read “0” and will have no effect when set to “1.”
LLV[4:0]
Left Line-In Volume. Allows setting the Line-In left channel attenuator in 32 volume levels with 31 steps of 1.5 dB each.
The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
LVM
Line-In Mute. When this bit is set to “1,” both the left and the right channels are muted, unless the MSPLT bit in
Register 76h is set to “1,” in which case this mute bit will only affect the left channel.
CD Volume Register (Index 12h)
Reg
No. Name
D15
12h CD Volume
CVM X
D14 D13 D12
X
D11
D10
D9
D8
D7
D6 D5 D4
LCV4 LCV3 LCV2 LCV1 LCV0 CDRM* X
X
D3
RCV4 RCV3
D2
D1
D0
Default
RCV2 RCV1 RCV0 8808h
*For AC ’97 compatibility, Bit D7 is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right channels.
If MSPLT is not set, the Bit D7 has no effect. All registers not shown and bits containing an X are assumed to be reserved. Refer to Table IV for examples.
RCV[4:0]
Right CD Volume. Allows setting the CD right channel attenuator in 32 volume levels with 31 steps of 1.5 dB each.
The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
RM
Right Channel Mute. Once enabled by the MSPLT bit in Register 76h, this bit mutes the Right channel separately
from the CVM bit. Otherwise this bit will always read “0” and will have no effect when set to “1.”
LCV[4:0]
Left CD Volume. Allows setting the CD left channel attenuator in 32 volume levels with 31 steps of 1.5 dB each.
The LSB represents 1.5 dB, and the range is +12 dB to –24.5 dB. The default value is 0 dB, mute enabled.
CVM
CD Volume Mute. When this bit is set to “1,” both the left and the right channels are muted, unless the MSPLT bit
in Register 76h is set to “1,” in which case this mute bit will affect only the left channel.
AUX Volume Register (Index 16h)
Reg
No. Name
D15
D14 D13 D12
16h AUX Volume
AVM
X
X
D11
D10
LAV4 LAV3 LAV2
D9
D8
D7
D6
LAV1 LAV0 AVRM* X
D5
D4
D3
D2
D1
D0
Default
X
RAV4 RAV3 RAV2 RAV1 RAV0 8808h
*For AC ’97 compatibility, Bit D7 is only available by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right channels.
If MSPLT is not set, Bit D7 has no effect. All registers not shown and bits containing an X are assumed to be reserved. Refer to Table IV for examples.
RAV[4:0]
Right AUX Volume. Allows setting the AUX right channel attenuator in 32 volume levels with 31 steps of 1.5 dB
each. The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
RM
Right Channel Mute. Once enabled by the MSPLT bit in Register 76h, this bit mutes the right channel separately
from the AVM bit. Otherwise, this bit will always read “0” and will have no affect when set to “1.”
LAV[4:0]
Left PCM Out Volume. Allows setting the PCM left channel attenuator in 32 volume levels. The LSB represents
1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
AVM
PCM Out Volume Mute. When this bit is set to “1,” both the left and the right channels are muted, unless the
MSPLT bit in Register 76h is set to “1,” in which case this mute bit will affect only the left channel.
REV. 0
–13–
AD1980
PCM-Out Volume Register (Index 18h)
Reg
No. Name
D15 D14 D13 D12
18h PCM Out Volume OM X
X
D11
D10
LOV4 LOV3 LOV2
D9
D8
D7
D6 D5 D4
LOV1 LOV0 OMRM* X
X
ROV4
D3
D2
D1
D0
Default
ROV3
ROV2 ROV1 ROV0 8808h
*For AC ’97 compatibility, Bit D7 is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right channels.
If MSPLT is not set, Bit D7 has no effect. All registers not shown and bits containing an X are assumed to be reserved. Refer to Table IV for examples.
Note that depending on the state of the AC97NC bit in Register 76h, this register has the following additional functionality:
For AC87NC = 0, the register also controls the Surround, Center, and LFE DAC Gain/Attenuators.
For AC97NC = 1, the register controls the PCM Out Volume only.
ROV[4:0]
Right PCM Out Volume. Allows setting the PCM right channel attenuator in 32 volume levels. The LSB represents
1.5 dB, and the gain range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
RM
Right Channel Mute. Once enabled by the MSPLT bit in Register 76h, this bit mutes the right channel separately
from the AVM bit. Otherwise, this bit will always read “0” and will have no affect when set to “1.”
LOV[4:0]
Left PCM Out Volume. Allows setting the PCM left channel attenuator in 32 volume levels. The LSB represents
1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
OM
PCM Out Volume Mute. When this bit is set to “1,” both the left and the right channels are muted, unless the
MSPLT bit in Register 76h is set to “1,” in which case this mute bit will affect only the left channel.
Table IV. Volume Settings for Line-In, CD Volume, AUX, and PCM-Out
Control Bits
Line-In (10h), CD (12h), AUX (16h) and PCM-Out (18h)
Reg. 76h
Left Channel Volume D[12:8]
Right Channel Volume D[4:0]
MSPLT* D15 WRITE READBACK Function
D7* WRITE
READBACK Function
0
0
0
0
1
0
0
0
1
0
0 0000
0 1000
1 1111
x xxxx
1 1111
0 0000
0 1000
1 1111
x xxxx
1 1111
12 dB Gain
0 dB Gain
–34.5 dB Gain
– dB Gain, Muted
–34.5 dB Gain
x
x
x
x
1
0 0000
0 1000
1 1111
x xxxx
x xxxx
0 0000
0 1000
1 1111
x xxxx
x xxxx
1
1
x xxxx
x xxxx
1 1111
1 1111
1
1
x xxxx
x xxxx
– dB Gain,
0
Left Only Muted
– dB Gain, Left Muted 1
12 dB Gain
0 dB Gain
–34.5 dB Gain
– dB Gain, Muted
– dB Gain,
Right Only Muted
–34.5 dB Gain
x xxxx
x xxxx
– dB Gain, Right Muted
*For AC ’97 compatibility, Bit D7 is only available by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right channels.
If MSPLT is not set, RM Bit has no effect.
x in the above table is “don’t care.”
Record Select Control Register (Index 1Ah)
Reg
No. Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
1Ah Record Select
X
X
X
X
X
LS2
LS1
LS0
X
X
X
X
X
RS2
RS1
RS0
0000h
All registers not shown and bits containing an X are assumed to be reserved.
Refer to Table V for examples. Used to select the record source, independently for the right and left channels. For single MIC recording, see MS bit (Register 20h) for
MIC1 and MIC2 input selection.
For dual MIC recording, see 2CMIC bit (Register 76h) to enable simultaneous recording into the left and the right channels.
The default value is 0000h, which corresponds to MIC input for both channels.
RS [2:0]
Right Record Select
LS [2:0]
Left Record Select
–14–
REV. 0
AD1980
Table V. Settings for Record Select Control
LS [10:8]
Left Record Source
RS [2:0]
Right Record Source
000
001
010
011
100
101
110
111
MIC
CD_L
Muted
AUX_L
LINE_IN_L
Stereo Mix (L)
Mono Mix
PHONE_IN
000
001
010
011
100
101
110
111
MIC
CD_R
Muted
AUX_R
LINE_IN_R
Stereo Mix (R)
Mono Mix
PHONE_IN
Record Gain Register (Index 1Ch)
Reg
No. Name
D15
D14
D13
D12
D11
D10
D9
D8
1Ch Record Gain
IM
X
X
X
LIM3
LIM2
LIM1
LIM0 IMRM* X
D7
D6
D5
D4 D3
D2
X
X
RIM2 RIM1 RIM0 8000h
RIM3
D1
D0
Default
*For AC ’97 compatibility, Bit D7 is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right channels.
If MSPLT is not set, Bit D7 has no effect. All registers not shown, and bits containing an X are assumed to be reserved. Refer to Table VI for examples.
RIM[3:0]
Right Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB, and the gain range is 0 dB to 22.5 dB.
RM
Right Channel Mute. Once enabled by the MSPLT bit in Register 76h, this bit mutes the right channel separately
from the IM bit. Otherwise, this bit will always read “0” and will have no effect when set to “1.”
LIM[3:0]
Left Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB, and the gain range is 0 dB to 22.5 dB.
IM
Input Mute. When this bit is set to “1,” both the left and the right channels are muted, unless the MSPLT bit in
Register 76h is set to “1,” in which case this mute bit will affect only the left channel.
Table VI. Settings for Record Gain Register
Control Bits
Record Gain (1Ch)
Reg. 76h
Left Channel Input Mixer D[11:8]
Right Channel Input Mixer D[3:0]
MSPLT* D15 WRITE
READBACK
Function
D7*
WRITE
READBACK Function
0
0
1111
1111
22.5 dB Gain
x
1111
1111
22.5 dB Gain
0
0
0000
0000
0 dB Gain
x
0000
0000
0 dB Gain
0
1
xxxx
xxxx
– dB Gain, Muted
x
xxxx
xxxx
– dB Gain, Muted
1
0
1111
1111
22.5 dB Gain
1
xxxx
xxxx
– dB Gain,
Right Only Muted
1
1
xxxx
xxxx
– dB Gain,
Left Only Muted
0
1111
1111
22.5 dB Gain
1
1
xxxx
xxxx
– dB Gain,
Left Muted
1
xxxx
xxxx
– dB Gain, Right Muted
*For AC ’97 compatibility, Bit D7 (RM) is available only by setting the MSPLT bit, Register 76h. The MSPLT bit enables separate mute bits for the left and right
channels. If MSPLT is not set, Bit D7 has no effect.
x is “don’t care.”
REV. 0
–15–
AD1980
General-Purpose Register (Index 20h)
Reg
No. Name
20h
D15
General-Purpose X
D14
D13
D12 D11
X
X
X
D10
DRSS1 DRSS0
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
X
MS
LPBK
X
X
X
X
X
X
X
0000h
This register should be read before writing to generate a mask for only the bit(s) that need to be changed. All registers not shown and bits containing an X are
assumed to be reserved.
LPBK
Loopback Control. This bit enables the digital internal loopback from the ADC to the Front DAC. This feature is
normally used for test and troubleshooting.
0 = No Loopback (Default)
1 = Loopback PCM digital data from ADC output to DAC
See LBKS bit in Register 0x74 for changing the loopback path to use the Surround or Center/LFE DACs.
MS
MIC Select. Selects Mono MIC input.
0 = Select MIC1
1 = Select MIC2
See 2CMIC bit in Register 76h to enable stereo microphone recording.
DRSS [1:0]
Double Rate Slot Select. The DRSS bits specify the slots for the n + 1 sample outputs. PCM L (n + 1) and PCM R
(n + 1) data are by default provided in output slots 10 and 11.
00: PCM L, R n + 1 Data is on Slots 10, 11 (reset default)
01: PCM L, R n + 1 Data is on Slots 7, 8
10: Reserved
11: Reserved
Audio Interrupt and Paging Mechanism Register (Index 24h)
Reg
No. Name
24h Audio Interrupt
and Paging
D15
D14
D13 D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
I4
X
X
I0
X
X
X
X
X
X
X
PG3
PG2
PG1
PG0 xxxxh
X
Default
This register controls the Audio Interrupt and Paging mechanism. All registers not shown and bits containing an X are assumed to be reserved.
PG[3:0]
Page Selector (Read Only). This register is used to describe Page Selector capability for extended features.
Reading these bits returns 0h, which describes Page Selection as vendor specific only.
I0
INTERRUPT ENABLE (R/W). This enables interrupt generation.
0 = Interrupt Generation is Masked (Default)
1 = Interrupt Generation is Unmasked
The S/W should not unmask the interrupt unless ensured by the AC ’97 controller that no conflict is possible with
Modem slot 12 GPI functionality.
AC ’97 2.2 compliant controllers will not likely support audio codec interrupt infrastructure. In that case, S/W could
poll the interrupt status after initiating a sense cycle and waiting for Sense Cycle Max Delay to determine if an interrupting event has occurred.
I4
INTERRUPT STATUS (R/W). This bit provides interrupt status and clear capability.
0 = Interrupt is Clear
1 = Interrupt was Generated
Interrupt event is cleared by writing a “1” to this bit. The interrupt bit will change regardless of condition of interrupt enable (I0) status. An interrupt in the GPI in slot 12 in the AC link will follow this bit change when interrupt
enable (I0) is unmasked.
–16–
REV. 0
AD1980
Power-Down Control/Status Register (Index 26h)
Reg
No. Name
26h Power-Down
Control/Status
D15
D14
D13 D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
EAPD
PR6
PR5 PR4
PR3
PR2
PR1
PR0
X
X
X
X
REF
ANL DAC ADC NA
The ready bits are read only; writing to REF, ANL, DAC, ADC will have no effect. These bits indicate the status for the AD1980 subsections. If the bit is a 1, then
that subsection is ready. Ready is defined as the subsection able to perform in its nominal state. All registers not shown and bits containing an X are assumed to be reserved.
ADC
ADC Sections Ready to Transmit Data
DAC
DAC Sections Ready to Transmit Data
ANL
Analog Amplifiers, Attenuators and Mixers Ready
REF
Voltage References, VREF and VREFOUT up to Nominal Level
PR[6:0]
Codec Power-Down Modes. The first three bits are to be used individually rather than in combination with each
other. PR3 can be used in combination with PR2 or by itself. The mixer and reference cannot be powered down via
PR3 unless the ADCs and DACs are also powered down. Nothing else can be powered up until the reference is up.
PR5 has no effect unless all ADCs, DACs, and the AC-Link are powered down. The reference and the mixer can be
either up or down, but all power-up sequences must be allowed to run to completion before PR5 and PR4 are both set.
In multiple codec systems, the master codec’s PR5 and PR4 bits control the slave codec. PR5 is also effective in the
slave codec if the master’s PR5 bit is clear, but the PR4 bit has no effect except to enable or disable PR5.
EAPD
External Audio Power-Down Control. Controls the state of the EAPD pin.
EAPD = 0 sets the EAPD pin low, enabling an external power amplifier (reset defaults).
EAPD = 1 sets the EAPD pin high, shutting off the external power amplifier.
REV. 0
–17–
AD1980
PR0 = 1
PR1 = 1
ADCs OFF
PR0
NORMAL
PR2 = 1
ANALOG
OFF
PR2 OR
PR3
DACs OFF
PR1
PR1 = 0
AND
DAC = 1
PR0 = 0
AND
ADC = 1
PR4 = 1
PR2 = 0
AND
ANL = 1
DIGITAL I/F
OFF
PR4
SHUT OFF
AC-LINK
WARM
RESET
COLD
RESET
READY = 1
DEFAULT
Figure 8. One Example of AC ‘97 Power-Down/Power-Up Flow
Extended Audio ID Register (Index 28h)
Reg
No. Name
D15 D14 D13 D12 D11
28h Ext’d Audio
ID1 ID0 X
X
D10
D9
D8
D7
D6
REV1 REV0 AMAP LDAC SDAC CDAC
D5
D4
D3 D2
DSA1
DSA0
X
D1
D0
SPDIF DRA VRA
Default
X3C7h
The extended audio ID register identifies which extended audio features are supported. A nonzero extended audio ID value indicates one or more of the extended
audio features are supported. All registers not shown and bits containing an X are assumed to be reserved.
VRA
Variable Rate PCM Audio Support (Read Only).
This bit returns a “1” when read to indicate that the Variable Rate PCM Audio is supported.
DRA
Double Rate Audio (Read Only).
This bit returns a “1” when read to indicate that the optional Double Rate RCM Audio is supported for PCM L
and PCM R.
SPDIF
SPDIF Support (Read Only). This bit returns a “1” when read to indicate that the SPDIF transmitter is supported
(IEC958).
This bit is also used to validate that the SPDIF transmitter output is actually enabled. The SPDIF bit is only
allowed to be set high if the SPDIF pin (48) is pulled down at power-up, enabling the codec transmitter logic. If the
SPDIF pin is floating or pulled high at power-up, the transmitter logic is disabled and therefore this bit returns a
low, indicating that the SPDIF transmitter is not available. This bit must always be read back to verify that the
SPDIF transmitter is actually enabled.
DSA[1,0]
DAC Slot Assignments (Read/Write) (Reset Default = 00)
00 DACs 1, 2 = 3 and 4 DACs 3, 4 = 7 and 8
DACs 5, 6 = 6 and 9
01 DACs 1, 2 = 7 and 8 DACs 3, 4 = 6 and 9
DACs 5, 6 = disabled
10 DACs 1, 2 = 6 and 9 DACs 3, 4 = disabled
DACs 5, 6 = disabled
11 Reserved
CDAC
PCM CENTER DAC Support (Read Only).
This bit returns a “1” when read to indicate that PCM center DAC is supported.
SDAC
PCM Surround DAC Support (Read Only).
This bit returns a “1” when read to indicate that PCM surround left and right DACs are supported.
LDAC
PCM LFE DAC Support (Read Only),
This bit returns a “1” when read to indicate that PCM LFE DAC is supported.
AMAP
Slot DAC Mappings Based on Codec ID (Read Only).
This bit returns a “1” when read to indicate that slot/DAC mappings based on codec ID are supported.
REV[1,0]
REV[1,0] = 01 indicates codec is AC ’97 revision 2.2 compliant (Read Only).
ID[1:0]
Indicates Codec Configuration (Read Only).
00 = Primary
01, 10, 11 = Secondary
–18–
REV. 0
AD1980
Extended Audio Status and Control Register (Index 2Ah)
Reg
No. Name
D15
D14 D13 D12 D11 D10
2Ah Extended Audio VFORCE X
Stat/Ctrl
PRK PRJ
D9 D8
PRI SPCV X
D7
D6
D5
D4
D3 D2
ELDAC ESDAC ECDAC SPSA1 SPSA0 X
D1
D0
Default
ESPDIF EDRA EVRA 0XX0h
The extended audio status and control register is a read/write register that provides status and control of the extended audio features. All registers not shown and bits
containing an X are assumed to be reserved.
EVRA
Variable Rate Audio (Read/Write).
VRA = 0, sets fixed sample rate audio at 48 kHz (Reset Default).
VRA = 1, enables variable rate audio mode (enables sample rate registers and SLOTREQ signaling).
EDRA
Double Rate Audio.
DRA = 1 enables double rate audio mode in which data from PCM L and PCM R in output slots 3 and 4 is used in
conjunction with PCM L (n + 1) and PCM R (n + 1) data to provide DAC streams at twice the sample rate designated by the PCM front sample rate control register. When using the double rate audio only the front DACs are
supported, and all other DACs (surround, center, and LFE) are automatically powered down.
Note that DRA can be used without VRA; in that case the converter rates are forced to 96 kHz if DRA = 1.
ESPDIF
SPDIF Transmitter Subsystem Enable/Disable Bit (Read/Write).
SPDIF = 1 enables the SPDIF transmitter.
SPDIF = 0 disables the SPDIF transmitter (default).
SPSA[1,0]
SPDIF Slot Assignment Bits (Read/Write).
These bits control the SPDIF slot assignment and respective defaults, depending on the codec ID configuration.
See the following table.
ECDAC
Center DAC Status (Read Only).
CDAC = 1 indicates the PCM center DAC is ready.
ESDAC
Surround DAC status (Read Only).
SDAC = 1 indicates the PCM surround DACs are ready.
ELDAC
LFE DAC status (Read Only).
LDAC = 1 indicates the PCM LFE DAC is ready.
SPCV
SPDIF Configuration Valid (Read Only). Indicates the status of the SPDIF transmitter subsystem, enabling the
driver to determine if the currently programmed SPDIF configuration is supported. SPCV is always valid, independent of the SPDIF enable bit status.
SPCV = 0 indicates current SPDIF configuration (SPSA, SPSR, DAC slot rate, DRS) is not valid (not supported).
SPCV = 1 indicates current SPDIF configuration (SPSA, SPSR, DAC slot rate, DRS) is valid (supported).
PRI
Center DAC Power-Down (Read/Write).
PRJ = 1 turns off the PCM Center DAC.
PRJ
Surround DACs Power-Down (Read/Write).
PRJ = 1 turns off the PCM surround DACs.
PRK
LFE DAC Power-Down (Read/Write).
PRJ = 1 turns off the PCM LFE DAC.
VFORCE
Validity Force Bit (Reset Default = 0).
When asserted, this bit forces the SPDIF stream validity flag (Bit 28 within each SPDIF L/R subframe) to be controlled by the V bit (D15) in Register 3Ah (SPDIF control register).
VFORCE = 0 and V = 0; the Validity Bit is managed by the codec error detection logic.
VFORCE = 0 and V = 1; the Validity Bit is forced high, indicating subframe data is invalid.
VFORCE = 1 and V = 0; the Validity Bit is forced low, indicating subframe data is valid.
VFORCE = 1 and V = 1; the Validity Bit is forced high, indicating subframe data is invalid.
REV. 0
–19–
AD1980
AC ’97 2.2 AMAP Compliant Default SPDIF Slot Assignments
Codec ID
Function
SPSA = 00
SPSA = 01
SPSA = 10
SPSA = 11
00
00
00
01
01
10
10
11
2-Ch Primary w/SPDIF
4-Ch Primary w/SPDIF
6-Ch Primary w/SPDIF
+2-Ch Secondary w/SPDIF
+4-Ch Secondary w/SPDIF
+2-Ch Secondary w/SPDIF
+4-Ch Secondary w/SPDIF
+2-Ch Secondary w/SPDIF
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
7 and 8 [default]
7 and 8
7 and 8
7 and 8
7 and 8
7 and 8
7 and 8
7 and 8
6 and 9
6 and 9[default]
6 and 9
6 and 9[default]
6 and 9
6 and 9[default]
6 and 9
6 and 9
10 and 11
10 and 11
10 and 11[default]
10 and 11[default]
10 and 11[default]
10 and 11[default]
PCM Front DAC Rate Register (Index 2Ch)
Reg
No. Name
2Ch PCM Front
DAC Rate
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
SRF15 SRF14 SRF13 SRF12 SRF11 SRF10 SRF9 SRF8 SRF7 SRF6 SRF5 SRF4 SRF3 SRF2 SRF1 SRF0 BB80h
This read/write Sample Rate Control Register contains 16-bit unsigned value, representing the rate of operation in Hz.
SRF[15:0]
Sample Rate.
The sampling frequency range is from 7 kHz (1B58h) to 48 kHz (BB80h) in 1 Hz increments. If zero is written to
VRA, then the sample rate is reset to 48 kHz.
PCM Surround DAC Rate Register (Index 2Eh)
Reg
No. Name
2Eh PCM Surr
DAC Rate
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
SRS15 SRS14 SRS13 SRS12 SRS11 SRS10 SRS9 SRS8 SRS7 SRS6 SRS5 SRS4 SRS3 SRS2 SRS1 SRS0 BB80h
This read/write Sample Rate Control Register contains 16-bit unsigned value, representing the rate of operation in Hz.
This register sets the sample rate for the surround DAC. This register’s reset default is to be locked to the PCM front DAC sample rate register (2-Ch).
To unlock this register, Bit SRU in Register 76h must be asserted.
SRS[15:0]
Sample Rate.
The sampling frequency range is from 7 kHz (1B58h) to 48 kHz (BB80h) in 1 Hz increments.
If zero is written to VRA bit, then the sample rate is reset to 48 kHz.
PCM LFE (and CENTER) DAC Rate Register (Index 30h)
Reg
No. Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
30h PCM LFE/ SRCL15 SRCL14 SRCL13 SRCL12 SRCL11 SRCL10 SRCL9 SRCL8 SRCL7 SRCL6 SRCL5 SRCL4 SRCL3 SRCL2 SRCL1 SRCL0 BB80h
C DAC
Rate
This read/write sample rate control register contains 16-bit unsigned value, representing the rate of operation in Hz.
This register sets the sample rate for the LFE DAC and Center DAC. This register’s reset default is to be locked to the PCM Front DAC sample rate register (2-Ch) .
To unlock the register bit, SRU in Register 76h must be asserted.
SRCL[15:0]
Sample Rate.
The sampling frequency range is from 7 kHz (1B58h) to 48 kHz (BB80h) in 1 Hz increments.
If zero is written to VRA, then the sample rate is reset to 48 kHz.
PCM ADC Rate Register (Index 32h)
Reg
No. Name
32h PCM L/R
ADC Rate
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
SRA15
SRA14 SRA13 SRA12 SRA11 SRA10 SRA9 SRA8 SRA7 SRA6 SRA5 SRA4 SRA3 SRA2 SRA1 SRA0 BB80h
This read/write sample rate control register contains 16-bit unsigned value, representing the rate of operation in Hz.
SRA[15:0]
Sample Rate.
The sampling frequency range is from 7 kHz (1B58h) to 48 kHz (BB80h) in 1 Hz increments.
If zero is written to VRA, then the sample rate is reset to 48 kHz.
–20–
REV. 0
AD1980
CENTER/LFE Volume Control Register (Index 36h)
Reg
No. Name
D15 D14
36h Center/LFE LM
Volume
D13*
X
D12
D11
LFE5 LFE4
D10
LFE3 LFE2
D9
D8
D7
LFE1 LFE0 CM
D6 D5*
X
D4
D3
D2
D1
D0
Default
CNT5 CNT4 CNT3 CNT2 CNT1 CNT0 8080h
All registers not shown and bits containing an X are assumed to be reserved.
Refer to Table VII for examples. This register controls the LFE output volume and mute bit. The volume registers contain five bit, generating
32 volume levels with 31 steps of 1.5 dB each. If MSPLT is not set, Bit D7 has no effect.
*Because AC ’97 defines 6-bit volume registers, to maintain compatibility, whenever the D5 or D13 bit is set to “1,” its respective lower five volume bits are automatically set to “1” by the codec logic. On readback, all lower five bits will read “1”s whenever this bit is set to “1.”
Note that depending on the state of the AC97NC bit in register 76h, this register operates as follows:
For AC97NC = 0, the register controls the center and LFE output pin Attenuators. Range is 0 dB to –46.5 dB.
For AC97NC = 1, the register controls the center and LFE DAC Gain/Attenuators. Range is +12 dB to –34.5 dB.
CNT[5:0]
Center Volume Control
CM
Center Volume Mute. When this bit is set to “1,” the channel is muted.
LFE[5:0]
LFE Volume Control
LM
LFE Volume Mute. When this bit is set to “1,” the channel is muted.
Table VII. Settings for Center/LFE Register
Control Bits
CENTER and LFE Volume (36h)
D15/D7
CENTER D[5:0] and LFE D[13:8]
WRITE
READBACK
Function with AC97NC = 0
Function with AC97NC = 1
0
0
0
0
1
00 0000
00 1111
01 1111
1x xxxx
xx xxxx
0 dB Gain
–22 dB Gain
–46.5 dB Gain
–46.5 dB Gain
Muted
12 dB Gain
–10.5 dB Gain
–34.5 dB Gain
Not Applicable
Muted
00 0000
00 1111
01 1111
01 1111
xx xxxx
Surround Volume Control Register (Index 38h)
Reg
No.
38h
Name
D15
D14 D13* D12
Surround
Volume
MUTE_L X
D11
D10
D9
D8
D7
D6
LSR5 LSR4 LSR3 LSR2 LSR1 LSR0 MUTE_R X
D5*
D4
D3
D2
RSR5 RSR4 RSR3 RSR2
D1
D0
Default
RSR1 RSR0 8080h
*Refer to Table VIII for examples. This register controls the surround volume controls for both stereo channels and mute bits. Each volume subregister contains
five bits, generating 32 volume levels with 31 steps of 1.5 dB each. Because AC ’97 defines 6-bit volume registers, to maintain compatibility, whenever the D5 or
D13 Bit is set to 1, its respective lower five volume bits are automatically set to “1” by the coded logic. On readback , all lower five bits will read “1s” whenever
these bits are set to “1.”
Note that depending on the state of the AC97NC bit in Register 0x76, this register operates as follows:
For AC97NC = 0, the register controls the surround output pin Attenuators. Range is 0 dB to –46.5 dB.
For AC97NC = 1, the register controls the surround DAC Gain/Attenuators. Range is +12 dB to –34.5 dB.
RSR[5:0]
Right Surround Volume Control
MUTE_R
Right Surround Volume Mute. When this bit is set to “1,” the right channel is muted.
LSR[5:0]
Left Surround Volume Control
MUTE_L
Left Surround Volume Mute. When this bit is set to “1,” the left channel is muted.
REV. 0
–21–
AD1980
Table VIII. Settings for Surround Register
Control Bits
Surround Volume (38h)
D15/D7
0
0
0
0
1
Left Surround D[13:8]
Right Surround D[5:0]
WRITE
READBACK
00 0000
00 0000
00 1111
00 1111
01 1111
01 1111
1x xxxx
01 1111
xx xxxx
xx xxxx
Function with AC97NC = 0
Function with AC97NC = 1
0 dB Gain
–22 dB Gain
–46.5 dB Gain
–46.5 dB Gain
Muted
12 dB Gain
–10.5 dB Gain
–34.5 dB Gain
Not Applicable
Muted
SPDIF Control Register (Index 3Ah)
Reg
No. Name
3Ah SPDIF
Control
D15
D14
V
X
D13
D12
D11
D10
D9
D8
SPSR1
SPSR0
L
CC6
CC5 CC4
D7
D6
D5
D4
D3
D2
D1
D0
Default
CC3
CC2
CC1
CC0
PRE COPY /AUD PRO 2000h
All registers not shown and bits containing an X are assumed to be reserved.
Register 3Ah is a read/write register that controls SPDIF functionality and manages bit fields propagated as channel status (or subframe in the V case). With the
exception of V, this register should only be written to when the SPDIF transmitter is disabled (SPDIF Bit in Register 2Ah is “0”). This ensures that control and status
information starts up correctly at the beginning of SPDIF transmission.
PRO
Professional. “1” indicates professional use of channel status, “0” indicates consumer.
/AUD
Non-Audio. “1” indicates data is non PCM format, “0” indicates data is PCM.
COPY
Copyright. “1” indicates copyright is asserted, “1” indicates copyright is not asserted.
PRE
Pre-emphasis. “1” indicates filter pre-emphasis is 50 µs/15 µs, “0” indicates pre-emphasis is none.
CC[6-0]
Category Code. Programmed according to IEC standards, or as appropriate.
L
Generation Level. Programmed according to IEC standards, or as appropriate.
SPSR[1,0]
SPDIF Transmit Sample Rate:
SPSR[1:0] = “00” Transmit Sample Rate = 44.1 kHz
SPSR[1:0] = “01” Reserved
SPSR[1:0] = “10” Transmit Sample Rate = 48 kHz (default)
SPSR[1:0] = “11” Not supported.
V
Validity. This bit affects the Validity flag (Bit 28 transmitted in each SPDIF L/R subframe) and enables the SPDIF
transmitter to maintain connection during error or mute conditions.
V = 1 Each SPDIF subframe (L+R) has Bit 28 set to “1.” This tags both samples as invalid.
V = 0 Each SPDIF subframe (L+R) has Bit 28 set to “0” for valid data and “1” for invalid data (error condition).
Note that when V = 0, asserting the VFORCE bit (D15) in Register 2Ah (Ext’d Audio Stat/Ctrl) will force the Validity flag low, marking both samples as valid.
–22–
REV. 0
AD1980
EQ Control Register (Index 60h)
Reg
No. Name
D15
60h EQ CTRL EQM
D14
D13
D12
D11
D10
D9
D8
D7
D6
X
X
X
X
X
X
X
SYM CHS
D5
D4
D3
BCA5 BCA4 BCA3
D2
D1
D0
Default
BCA2 BCA1 BCA0 8080h
All registers not shown, and bits containing an X are assumed to be reserved.
Register 60h is a read/write register that controls the Equalizer functionality and data setup. This register also contains the Biquad and Coefficient Address pointer,
which is used in conjunction with the EQ Data Register (78h) to set up the equalizer coefficients. The reset default disables the Equalizer function until the coefficients can be properly set up by the software and sets the Symmetry Bit to allow equal coefficients for the left and right channels.
BCA[5,0]
Biquad and Coefficient Address Pointer:
biquad 0
biquad 0
biquad 0
biquad 0
biquad 0
coef a0
coef a1
coef a2
coef b1
coef b2
BCA[5,0] = 011011
BCA[5,0] = 011010
BCA[5,0] = 011001
BCA[5,0] = 011101
BCA[5,0] = 011100
biquad 1
biquad 1
biquad 1
biquad 1
biquad 1
coef a0
coef a1
coef a2
coef b1
coef b2
BCA[5,0] = 100000
BCA[5,0] = 011111
BCA[5,0] = 011110
BCA[5,0] = 100010
BCA[5,0] = 100001
biquad 2
biquad 2
biquad 2
biquad 2
biquad 2
coef a0
coef a1
coef a2
coef b1
coef b2
BCA[5,0] = 100101
BCA[5,0] = 100100
BCA[5,0] = 100011
BCA[5,0] = 100111
BCA[5,0] = 100110
biquad 3
biquad 3
biquad 3
biquad 3
biquad 3
coef a0
coef a1
coef a2
coef b1
coef b2
BCA[5,0] = 101010
BCA[5,0] = 101001
BCA[5,0] = 101000
BCA[5,0] = 101100
BCA[5,0] = 101011
biquad 4
biquad 4
biquad 4
biquad 4
biquad 4
coef a0
coef a1
coef a2
coef b1
coef b2
BCA[5,0] = 101111
BCA[5,0] = 101110
BCA[5,0] = 101101
BCA[5,0] = 110001
BCA[5,0] = 110000
biquad 5
biquad 5
biquad 5
biquad 5
biquad 5
coef a0
coef a1
coef a2
coef b1
coef b2
BCA[5,0] = 110100
BCA[5,0] = 110011
BCA[5,0] = 110010
BCA[5,0] = 110110
BCA[5,0] = 110101
biquad 6
biquad 6
biquad 6
biquad 6
biquad 6
coef a0
coef a1
coef a2
coef b1
coef b2
BCA[5,0] = 111001
BCA[5,0] = 111000
BCA[5,0] = 110111
BCA[5,0] = 111011
BCA[5,0] = 111010
CHS
Channel Select.
CHS = 0 selects left channel coefficients data block.
CHS = 1 selects right channel coefficients data block.
SYM
Symmetry.
When set to “1,” this bit indicates that the left and right channel coefficients are equal. This shortens the coefficients’ setup sequence since only the left channel coefficients need to be addressed and set up. (The right channel
coefficients are fetched from the left channel memory.)
EQM
Equalizer Mute.
When set to “1,” this bit disables the equalizer function (allows all data pass through). The reset default sets this bit
to “1,” disabling the equalizer function until the biquad coefficients can be properly set.
REV. 0
–23–
AD1980
EQ Data Register (Index 62h)
Reg
No. Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
62h EQ DATA CFD15 CFD14 CFD13 CFD12 CFD11 CFD10 CFD9 CFD8 CFD7 CFD6 CFD5 CFD4 CFD3 CFD2 CFD1 CFD0 0000h
This read/write register is used to transfer EQ biquad coefficients into memory. The register data is transferred to, or retrieved from, the address pointed to by the
BCA Bits in the EQ CNTRL register (60h). Data will only be written to memory if the EQM bit (Register 60h, Bit 15) is asserted.
CFD[15,0]
Coefficient Data. The biquad coefficients are fixed-point format values with 16 bits of resolution. The CFD15 bit is
the MSB and the CFD0 bit is the LSB.
Jack Sense/Audio Interrupt Status Register (Index 72h)
Reg
No. Name
D15
72h Jack
Sense
JS1
JS1
JS0
JS
SPRD DMX DMX MT2
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
JS
MT1
JS
MT0
JS1
EQB
JS0
EQB
JS1
TMR
JS0
TMR
JS1
MD
JS0
MD
JS1
ST
JS0
ST
JS1
INT
JS0
INT
0000h
All register bits are read/write except for JS0ST and JS1ST, which are read only.
JS0INT
Indicates Pin JS0 has generated an interrupt. Remains set until the software services JS0 interrupt, i.e., JS0 ISR
should clear this bit by writing a “0” to it. Note that the interrupt to the system is actually an OR combination of
this bit and JS1INT. Also, note that the actual interrupt implementation is selected by the INTS bit (Register 76h).
It is also possible to generate a software system interrupt by writing a “1” to this bit.
JS1INT
Indicates Pin JS1 has generated an interrupt. Remains set until the software services JS1 interrupt, i.e., JS1 ISR
should clear this bit by writing a “0” to it. See the JS0INT description for additional details.
JS0ST
JS0 STATE. This bit always reports the logic state of JS0 pin.
JS1ST
JS1 STATE. This bit always reports the logic state of JS1 pin.
JS0MD
JS0 Mode. This bit selects the operation mode for the JS0 pin.
0 = Jack Sense Mode (reset default)
1 = Interrupt Mode
JS1MD
JS1 Mode. This bit selects the operation mode for the JS1 pin.
0 = Jack Sense Mode (reset default)
1 = Interrupt Mode
JS0TMR
JS0 Timer Enable. If this bit is set to a “1,” JS0 must be high for greater than 278 ms to be recognized.
JS1TMR
JS1 Timer Enable. If this bit is set to a “1,” JS1 must be high for greater than 278 ms to be recognized.
JS0EQB
JS0 EQ Bypass Enable. This bit enables JS0 to control the EQ bypass. When this bit is set to “1,” JS0 = 1 will
cause the EQ to be bypassed.
JS1EQB
JS1 EQ Bypass Enable. This bit enables JS1 to control the EQ bypass. When this bit is set to “1,” JS1 = 1 will
cause the EQ to be bypassed.
JSMT[2,0]
JS Mute Enable Selector. These three bits select and enable the Jack Sense muting action (see Table IX).
JS0DMX
JS0 Down = Mix Control Enable. This bit enables JS0 to control the Down-Mix function. This function allows a
digital mix of six channels of audio into 2-channel audio. The mix can then be routed to the stereo Line_out or
HP_out jacks. When this bit is set to “1,” JS0 = 1 will activate the Down-Mix conversion.
See the DMIX description in Register 76h. The DMIX bits select the Down-Mix implementation type and can also
force the function to be activated.
JS1DMX
JS1 Down Mix Control Enable. This bit enables 2-channel to 6-channel audio Spread function when both Jack
Senses are active (logic state “1”).
Note that the SPRD bit can also force the Spread function without being gated by the Jack Senses. See this bit’s
description in Register 76h for a better understanding of the Spread function.
JSSPRD
JS Spread Control Enable. This bit enables 2-channel to 6-channel audio Spread function when both Jack Senses
are active (logic state “1”).
Note that the SPRD bit can also force the Spread function without being gated by the Jack Senses. See this bit’s
description in Register 76h for a better understanding of the Spread function.
–24–
REV. 0
AD1980
Table IX. Jack Sense Mute Select (JSMT [2:0])
HP
JSMT2 JSMT1 JSMT0 OUT
LINE
OUT
C/LFE
OUT
MONO
OUT
(0)
(1)
(0)
(1)
0
0
0
0
0
0
0
0
0
0
0
0
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
JS0 and JS1 ignored
OUT
IN
OUT
IN
(0)
(1)
(0)
(1)
0
0
0
0
0
0
0
0
1
1
1
1
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
JS0 no mute action,
JS1 mutes mono and
enables LINE_OUT
and C/LFE.
Standard 6-channel
config swapped
HP_OUT and
LINE_OUT.
(0)
(0)
(1)
(1)
OUT
IN
OUT
IN
(0)
(1)
(0)
(1)
0
0
0
0
1
1
1
1
0
0
0
0
FMUTE
FMUTE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
JS0 no mute action,
JS1 mutes Mono and
enables HP_OUT
and C/LFE.
Standard 6-channel
config no swap.
OUT
OUT
IN
IN
(0)
(0)
(1)
(1)
OUT
IN
OUT
IN
(0)
(1)
(0)
(1)
0
0
0
0
1
1
1
1
1
1
1
1
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
** Reserved
16
17
18
19
OUT
OUT
IN
IN
(0)
(0)
(1)
(1)
OUT
IN
OUT
IN
(0)
(1)
(0)
(1)
1
1
1
1
0
0
0
0
0
0
0
0
ACTIVE
ACTIVE
ACTIVE
ACTIVE
FMUTE
ACTIVE
FMUTE
FMUTE
FMUTE
ACTIVE
FMUTE
FMUTE
ACTIVE
FMUTE
FMUTE
FMUTE
JS0 = 0 and JS1 = 0
enables mono.
JS1 = 1 enables front
only.
JS0 = 1 enables all rear.
6-chan config with
front jack wrap back.
20
21
22
23
OUT
OUT
IN
IN
(0)
(0)
(1)
(1)
OUT
IN
OUT
IN
(0)
(1)
(0)
(1)
1
1
1
1
0
0
0
0
1
1
1
1
FMUTE
FMUTE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
FMUTE
FMUTE
ACTIVE
ACTIVE
ACTIVE
FMUTE
FMUTE
FMUTE
JS0 no mute action,
JS1 mutes mono and
enables LINE_OUT
+ HP_OUT + C/LFE.
Standard 6-channel
config swapped
HP_OUT and
LINE_OUT.
24
25
26
27
OUT
OUT
IN
IN
(0)
(0)
(1)
(1)
OUT
IN
OUT
IN
(0)
(1)
(0)
(1)
1
1
1
1
1
1
1
1
0
0
0
0
**
**
**
**
**
**
**
**
**
**
**
**
** Reserved
28
29
30
31
OUT
OUT
IN
IN
(0)
(0)
(1)
(1)
OUT
IN
OUT
IN
(0)
(1)
(0)
(1)
1
1
1
1
1
1
1
1
1
1
1
1
**
**
**
**
**
**
**
**
**
**
**
**
** Reserved
REF
JS1
JS0
0
1
2
3
OUT
OUT
IN
IN
(0)
(0)
(1)
(1)
OUT
IN
OUT
IN
4
5
6
7
OUT
OUT
IN
IN
(0)
(0)
(1)
(1)
8
9
10
11
OUT
OUT
IN
IN
12
13
14
15
FMUTE = Output is forced to mute independent of the respective Volume Register setting.
ACTIVE = Output is not muted and its status is dependent on the respective Volume Register setting.
OUT = Nothing plugged into the jack and therefore the JS status is “0” (via the load resistor pull-down).
IN = Jack has plug inserted and therefore the JS status is “1” (via the codec JS internal pull-up).
REV. 0
–25–
NOTES
AD1980
Serial Configuration Register (Index 74h)
Reg
No. Name D15
D14
D13
D12
D11
D10 D9 D8
74h Serial SLOT16 REGM2 REGM1 REGM0 REGM3 DRF X
Configuration
D7 D6
CHEN X
D5
D4
D3 D2
LBKS1 LBKS0 INTS X
D1
D0
Default
SPAL SPDZ SPLNK 1001h
All registers not shown and bits containing an X are assumed to be reserved.
Note that this register is not reset when the reset register (0x00) is written to (soft reset).
SPLNK
SPDIF Link. This bit enables the SPDIF to link with the front DACs for data requesting.
0 = SPDIF and DAC are not linked.
1 = SPDIF and DAC are linked and receive the same data requests (reset default).
SPDZ
SPDIF DACZ.
0 = Repeat last sample out of the SPDIF stream if FIFO under-runs (reset default).
1 = Forces midscale sample out the SPDIF stream if FIFO under-runs.
SPAL
SPDIF ADC Loop-around.
0 = SPDIF transmitter is connected to the AC-Link stream (reset default).
1= SPDIF transmitter is connected to the digital ADC stream, not the AC-Link.
INTS
Interrupt Mode Select. This bit selects the JS interrupt implementation path.
0 = Bit 0 SLOT 12 (modem interrupt) (reset default).
1 = Slot 6 Valid Bit (MIC ADC interrupt).
LBKS[1:0]
Loop-Back Selection. These bits select the internal digital loop-back path when LPBK bit is active (see Register 20h)
00 = Loop back through the front DACs (reset default).
01 = Loop back through the surround DACs.
10 = Reserved
11 = Loop-back through the center and LFE DACs (Center DAC loops back from the ADC left channel, the LFE
DAC from the ADC right channel).
CHEN
Chain Enable. This bit enables chaining of a slave codec SDATA_IN stream into the ID0 pin (Pin 45).
0 = Disable chaining (reset default).
1 = Enable chaining into ID0 pin.
DRF
DAC Request Force. This allows the AD1980 to synchronize DAC requests with the AD1981A/B.
0 = Normal DAC requesting sequence (reset default).
1 = Synchronize to AD1981A/B DAC requests.
REGM3
Slave 3 Codec Register Mask
REGM0
Master Codec Register Mask
REGM1
Slave 1 Codec Register Mask
REGM2
Slave 2 Codec Register Mask
SLOT16
Enable 16-Bit Slot Mode. SLOT16 makes all ac-link slots 16 bits in length, formatted into 16 slots. This is a
preferred mode for DSP serial port interfacing.
–26–
REV. 0
AD1980
Miscellaneous Control Bit Register (Index 76h)
Reg
No. Name D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
76th Misc DACZ AC97NC MSPLT LODIS CLDIS HPSEL DMIX1 DMIX0 SPRD 2CMIC LOSEL SRU VREFH VREFD MBG1MBG0 0000h
Control
Bits
MBG[1:0]
MIC Boost Gain Select Register.
These two bits allow changing the MIC preamp gain from the nominal 20 dB gain. Both MIC1/MIC2 and MIC2
preamps will be set to the same selected gain.
Note that this gain takes effect only while Bit D6 (M20) on the MIC volume register (0Eh) is set to 1; otherwise the
MIC boost block has a gain of 0 dB.
00 = 20 dB gain (reset default)
01 = 10 dB gain
10 = 30 dB gain
11 = reserved
VREFD
VREFOUT Disable. Disables VREFOUT, placing it into High Z out mode.
Note that this bit overrides the VREFH bit selection (see below).
0 = VREFOUT pin is driven by the internal reference (reset default).
1 = VREFOUT pin is placed into High Z out mode.
VREFH
VREFOUT High. Changes VREFOUT from 2.25 V to 3.70 V for PC2001 compliant MIC bias applications.
0 = VREFOUT pin is set to 2.25 V output (reset default).
1 = VREFOUT pin is set to 3.70 V output.
SRU
Sample Rate Unlock. Controls DAC sample rate locking.
0 = All DAC Sample Rates are locked to the front sample rate (reset default).
1 = DAC sample rates can be set independently for front, surround, and LFE.
LOSEL
LINE_OUT Amplifiers Input Select. This bit allows the LINE_OUT output amplifiers to be driven by the mixer
or the surround DACs. The main purpose for this is to allow swapping of the front and surround channels to make
better use of the SURR/HP_OUT output amplifiers. This bit should normally be used in tandem with the HPSEL
bit (see below).
0 = LINE_OUT amplifiers are driven by the mixer outputs (reset default).
1 = LINE_OUT amplifiers are driven by the surround DAC outputs.
2CMIC
2-Channel MIC Select. This bit enables simultaneous recording from MIC1 and MIC2 inputs, using a stereo
microphone array. Note that this register works in conjunction with the MS bit in Register 20h.
0 = MIC1 or MIC2 (determined by MS bit) is routed to the record selector’s left and right MIC channels as well
as to the mixer (reset default).
1 = MIC1 is routed to the record selector’s left MIC channel and MIC2 is routed to the record selector’s right
MIC channel. Note that in this mode, the MS bit should be set low and MIC1 can still be enabled into the mixer.
SPRD
SPREAD Enable. This bit enables spreading of 2-channel media to all six output channels. This function is implemented in the analog section by using the output selector controls line for the center/LFE, surround, and Line_out
output channels. Note that the Jack Sense pins can also be set up to control (gate) this function, depending on the
JSSPRD bit (see Register 72h).
0 = No spreading occurs unless activated by the Jack Senses and JSSPRD bits (reset default).
1 = The SPRD selector drives the center and LFE outputs from the MONO_OUT, the HPSEL selector drives the
SURR/HP_OUT outputs from the mixer outputs, and the LOSEL selector drives the LINE_OUT outputs also
from the mixer outputs.
Note that the SPRD bit overrides the current output selector control lines set up by bits LOSEL and HPSEL as
follows: LOSEL = 0 and HPSEL = 1.
REV. 0
–27–
AD1980
DMIX[1:0]
Down Mix Mode Select. Provides analog down-mixing of the center, LFE, and/or surround channels into the
mixer channels. This allows the full content of 5.1 or quad media to be played through stereo headphones or
speakers.
Note that the Jack Sense pins can also be set up to control (gate) this function depending on the JS0DMX and
JS1DMX Bits (see Register 72h).
The upper bit allows forcing the down-mix function:
DMIX[1] = 0, no down-mix unless activated by the Jack Sense and JSxDMX bits (default).
DMIX[1] = 1, forces down-mix function.
The lower bit selects the down-mix type:
DMIX[0] = 0, selects 6-to-4 down-mix. The center and LFE channels are summed equally into the mixer left and
right channels (default).
DMIX[0] = 1, selects 6-to-2 down-mix. The surround left and right channels are summed into the mixer left and
right channels.
Default for DMIX[1:0] is “00.”
HPSEL
Headphone Amplifier Input Select. This bit allows the headphone power amps to be driven from the surround
DACs or from the mixer outputs. There are two reasons for this: one is to allow 2-channel media to use the
higher power headphone amplifiers available on the SURR/HP_OUT outputs; the other is to allow spreading of
2-channel media to the surround outputs.
Together with the LOSEL bit (see above), this bit also provides for analog swapping of the mixer (front) and surround outputs.
0 = SURR_out/HP_out outputs are driven by the surround DACs (reset default).
1 = SURR_out/HP_out outputs are driven by the mixer outputs.
CLDIS
Center and LFE Disable. Disables the center and LFE output pins, placing them into High-Z mode so that the
assigned output audio jack(s) can be shared for MIC inputs or other functions.
0 = Center and LFE output pins have normal audio drive capability (reset default).
1 = Center and LFE output pins are placed into High-Z mode.
LODIS
Line_out Disable. Disables the Line_out pins (L/R), placing them into High-Z mode so that the assigned output
audio jack can be shared for Line Input function.
0 = Line_out pins have normal audio drive capability (reset default).
1 = Line_out pins are placed into High-Z mode.
MSPLT
Mute Split. Allows separate mute control bits for master, HP, Line_in, CD, PCM OUT, and record volume/gain
control registers.
0 = Both left and right channel mutes are controlled by Bit D15 in the respective registers (reset default).
1 = Bit D15 affects only the left channel mute and Bit D7 affects only the right channel mute.
AC97NC
AC ’97 No Compatibility Mode. This bit allows the surround, center, and LFE volume control registers and
output attenuators to operate in a more functional mode than defined by the AC97 2.2 spec. This is called ADI
compatibility mode.
In AC ’97 compatibility mode, the DAC Gain/Attenuators for the surround, center, and LFE are controlled by
Register 18h (PCM volume). The output pin attenuators for the surround are controlled by Register 38h, and the
output pin attenuators for the center and LFE are controlled by Register 36h.
In ADI compatibility mode, the Surround DAC Gain/Attenuators are controlled by Register 38h, and the Center/
LFE DAC are controlled by Register 36h.
The output pin attenuators for Center/LFE are controlled by Register 02h (Master Volume), and the output pin
attenuators for Surround are controlled by Register 04h.
0 = AC97 compatibility mode (reset default).
1 = ADI compatibility mode.
DACZ
DAC Zero-Fill. Determines DAC data fill under starved condition.
0 = DAC data is repeated when DACs are starved for data (reset default).
1 = DAC data is zero-filled when DACs are starved for data.
–28–
REV. 0
AD1980
Vendor ID Register (Index 7Ch–7Eh)
Reg
No. Name
D15
7Ch Vendor ID1 F7
D14 D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2 D1 D0 Default
F6
F4
F3
F2
F1
F0
S7
S6
S5
S4
S3
S2
F5
S[7:0]
This register is ASCII encoded to A.
F[7:0]
This register is ASCII encoded to D.
Reg
No. Name
D15 D14 D13 D12 D11 D10 D9 D8 D7
7Eh Vendor ID2 T7 T6
T5 T4 T3
T2
D6
D5
D4
D3
D2
S1
D1
S0
D0
Default
T1 T0 REV7 REV6 REV5 REV4 REV3 REV2 REV1 REV0 5370h
T[7:0]
This register is ASCII encoded to S.
REV[7:0]
This register is set to 70h identifying the AD1980.
Codec ID and Clock Selection Table
XTL_IN
ID1#
IDO#
Codec ID
Codec Clocking Source
GND
GND
GND
XTAL
into XTL_IN
CLK INPUT
CLK INPUT
CLK INPUT
0
0
1
1
0
1
0
1
SECONDARY, ID = 3
SECONDARY, ID = 2
SECONDARY, ID = 1
PRIMARY, ID = 0
12.288 MHz (BIT_CLK from Primary Codec)
12.288 MHz (BIT_CLK from Primary Codec)
12.288 MHz (BIT_CLK from Primary Codec)
24.576 MHz Local XTAL or External CLK
0
0
1
0
1
X
PRIMARY, ID = 0
PRIMARY, ID = 0
RESERVED
14.3181 MHz (External into XTL_IN)
48.00 MHz (External into XTL_IN)
RESERVED
Note that internally, the ID pins have weak pull-ups and are inverted.
REV. 0
4144h
–29–
AD1980
OUTLINE DIMENSIONS
48-Lead Plastic Quad Flatpack [LQFP]
1.4 mm Thick
(ST-48)
Dimensions shown in millimeters
1.60 MAX
0.75
0.60
0.45
PIN 1
INDICATOR
9.00 BSC
37
48
36
1
1.45
1.40
1.35
0.15
0.05
0.20
0.09
SEATING
PLANE
SEATING
PLANE
7.00
BSC
TOP VIEW
(PINS DOWN)
7ⴗ
3.5ⴗ
0ⴗ
0.08 MAX
COPLANARITY
VIEW A
25
12
13
0.50
BSC
VIEW A
ROTATED 90ⴗ CCW
24
0.27
0.22
0.17
COMPLIANT TO JEDEC STANDARDS MS-026BBC
–30–
REV. 0
–31–
–32–
PRINTED IN U.S.A.
C03231–0–11/02(0)