AD1816A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1997
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Compatible with Microsoft
PC 97 Logo Requirements
Supports Applications Written for Windows
95,
Windows 3.1, Windows NT, SoundBlaster
Pro,
AdLib
/OPL3
Stereo Audio 16-Bit
Codec
Internal 3D Circuit--PhatTM
Stereo Phase Expander
MPC Level-3 Mixer
ISA Plug and Play Compatible
16-Bit Address Decode
Dual Type F FIFO DMA Support
MPU-401 Compatible MIDI Port
Supports Wavetable Synthesizers
Integrated Enhanced Digital Game Port
Bidirectional DSP Serial Port
Two I
2
S Digital Audio Serial Ports
Integrated OPL3 Compatible Music Synthesizer
Software and Hardware Volume Control
Full-Duplex Capture and Playback Operation at
Different Sample Rates
Supports Up to Six Different Sample Rates Simultaneously
1 Hz Resolution Programmable Sample Rates from
4 kHz to 55.2 kHz
Power Management Modes
Operation from +5 V Supply
Built-In 24 mA Bus Drivers
100-Lead PQFP and TQFP Package
FUNCTIONAL BLOCK DIAGRAM
M
A
I
2
S SERIAL PORT (0)
DIGITAL PLL
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
AD1816A
XTALI
XTALO
MIDI_IN
MIDI_OUT
A_1
B_1
A_X
B_X
A_2
B_2
A_Y
B_Y
PHONE_IN
MIC
LINE
SYNTH
CD
VID
L_OUT
R_OUT
PCLKO
SDATA (1)
LRCLK (1)
BCLK (1)
SDATA (0)
LRCLK (0)
BCLK (0)
IOW
IOR
DACK
(X)
AEN
PC_A (15:0)
PC_D (7:0)
IRQ (X)
DRQ (X)
SDI
SDO
SCLK
I
2
S SERIAL PORT (1)
FORMAT
FIFO
PLUG AND PLAY ISA BUS
PARALLEL INTERFACE
FORMAT
FIFO
PGA
SELECTOR
MPU-401
SB PRO
REGISTER
GAME PORT
HARDWARE
VOLUME
CONTROL
AGC
0dB/
20dB
OSCILLATORS
G
A
M
MV
MV
DSP SERIAL PORT
G
A
M
G
A
M
G
A
M
SDFS
DATA
CLK
E
2
PROM
CONTROL
SEL
XIRQ
MODEM/
LOGICAL
DEVICE
CONTROL
A
M
MV
M
A
M
A
M
A
2
2
2
2
2
PHONE_OUT
SERIAL PORT
INTERFACE
MUSIC
SYNTHESIZER
G
A
M
VOL_UP
VOL_DN
16-BIT
A/D
CONVERTER
16-BIT
D/A
CONVERTER
PHAT
STEREO
PHAT
STEREO
SoundPort
Controller
SoundPort is a registered trademark of Analog Devices, Inc.
Phat is a trademark of Analog Devices, Inc.
All other trademarks are the property of their respective holders.
a
AD1816A
2
REV. A
PRODUCT OVERVIEW
The AD1816A SoundPort Controller is a single chip Plug and
Play multimedia audio subsystem for concurrently processing
multiple digital streams of 16-bit stereo audio in personal com-
puters. The AD1816A maintains full legacy compatibility with
applications written for SoundBlaster Pro and AdLib, while ser-
vicing Microsoft PC 97 application requirements. The AD1816A
includes an internal OPL3 compatible music synthesizer, Phat
Stereo circuitry for phase expanding the analog stereo output,
an MPU-401 UART, joystick interface with a built-in timer, a
DSP serial port and two I
2
S serial ports. The AD1816A on-chip
Plug and Play routine provides configuration services for all in-
tegrated logical devices. Using an external E
2
PROM allows the
AD1816A to decode up to two additional external user-defined
logical devices such as modem and CD-ROM.
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PIN CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . 11
HOST INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SERIAL INTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
ISA INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
AD1816A Chip Registers . . . . . . . . . . . . . . . . . . . . . . . . . 21
AD1816A Plug and Play Device Configuration Registers . . 22
Sound System Direct Registers . . . . . . . . . . . . . . . . . . . . . 23
Sound System Indirect Registers . . . . . . . . . . . . . . . . . . . 29
SB Pro; AdLib Registers . . . . . . . . . . . . . . . . . . . . . . . . . . 38
MPU-401 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Game Port Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
APPENDIX A.
PLUG AND PLAY INTERNAL ROM . . . . . . . . . . . . . . 40
PLUG AND PLAY KEY AND "ALTERNATE KEY"
SEQUENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
AD1816 AND AD1816A COMPATIBILITY . . . . . . . . . 42
USING AN EEPROM WITH THE AD1816 OR
AD1816A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
AD1816 FLAG BYTE . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
USING THE AD1816 WITHOUT AN EEPROM . . . . . 42
AD1816A FLAG BYTES . . . . . . . . . . . . . . . . . . . . . . . . 43
USING THE AD1816A WITHOUT AN EEPROM . . . . 44
MAPPING THE AD1816 EEPROM INTO THE
AD1816A EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . 45
PIN MUXING IN THE AD1816 AND AD1816A . . . . . 45
PROGRAMMING EXTERNAL EEPROMS . . . . . . . . . 47
REFERENCE DESIGNS AND DEVICE DRIVERS . . . 47
OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . 50
TABLE OF CONTENTS
Figures
Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 1. PIO Read Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. PIO Write Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. DMA Read Cycle . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. DMA Write Cycle . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5. Codec Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 6. DSP Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 7. I
2
S Serial Port Timing . . . . . . . . . . . . . . . . . . . . . . 7
Figure 8. Reset Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 9. Serial Interface Right-Justified Mode . . . . . . . . . . 17
Figure 10. Serial Interface I
2
S-Justified Mode . . . . . . . . . . . 17
Figure 11. Serial Interface Left-Justified Mode . . . . . . . . . . 17
Figure 12. DSP Serial Interface (Default Frame Rate) . . . . 20
Figure 13. DSP Serial Interface (User Programmed
Frame Rate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 14. DSP Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15. Codec Transfers . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 16. Recommended Application Circuit . . . . . . . . . . 48
Figure 17. AD1816A Frequency Response Plots . . . . . . . . . 49
Tables
Table I. DSP Port Time Slot Map . . . . . . . . . . . . . . . . . . . 18
Table II. Chip Register Diagram . . . . . . . . . . . . . . . . . . . . . 21
Table III. Logical Devices and Compatible Plug and
Play Device Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table IV. Internal Logical Device Configuration . . . . . . . . 23
Table V. Sound System Direct Registers . . . . . . . . . . . . . . . 23
Table VI. Codec Transfers . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table VII. Indirect Register Map and Reset/Default States . 30
Table VIII. Sound System Indirect Registers . . . . . . . . . . . 31
Table IX. SoundBlaster Pro ISA Bus Registers . . . . . . . . . . 38
Table X. AdLib ISA Bus Registers . . . . . . . . . . . . . . . . . . . 39
Table XI. MIDI ISA Bus Registers . . . . . . . . . . . . . . . . . . . 39
Table XII. Game Port ISA Bus Registers . . . . . . . . . . . . . . 39
Table XIII. AD1816 Pin Muxing . . . . . . . . . . . . . . . . . . . . 45
Table XIV. AD1816A Pin Muxing . . . . . . . . . . . . . . . . . . . 46
SPECIFICATIONS
STANDARD TEST CONDITIONS UNLESS
OTHERWISE NOTED
Temperature
25
C
Digital Supply (V
DD
)
5.0
V
Analog Supply (V
CC
)
5.0
V
Sample Rate (F
S
)
48
kHz
Input Signal Frequency
1008
Hz
Audio Output Passband
20 Hz to 20 kHz
V
IH
5.0
V
V
IL
0
V
DAC Test Conditions
0 dB Attenuation
Input Full Scale
16-Bit Linear Mode
100 k
Output Load
Mute Off
Measured at Line Output
ADC Test Conditions
0 dB Gain
Input 4 dB Relative to Full Scale
Line Input Selected
16-Bit Linear Mode
AD1816A
REV. A
3
ANALOG INPUT
Parameter
Min
Typ
Max
Units
Full-Scale Input Voltage (RMS Values Assume Sine Wave Input)
PHONE_IN, LINE, SYNTH, CD, VID
1
V rms
2.83
V p-p
MIC with +20 dB Gain (MGE = 1)
0.1
V rms
0.283
V p-p
MIC with 0 dB Gain (MGE = 0)
1
V rms
2.83
V p-p
Input Impedance*
17
k
Input Capacitance*
15
pF
PROGRAMMABLE GAIN AMPLIFIER--ADC
Parameter
Min
Typ
Max
Units
Step Size (0 dB to 22.5 dB)
(All Steps Tested)
1.5
dB
PGA Gain Range Span
22.5
dB
CD, LINE, MICROPHONE, SYNTHESIZER, AND VIDEO INPUT ANALOG GAIN/ATTENUATORS/MUTE AT LINE OUTPUT
Parameter
Min
Typ
Max
Units
CD, LINE, MIC, SYNTH, VID
Step Size: (All Steps Tested)
+12 dB to 34.5 dB
1.5
dB
Input Gain/Attenuation Range
46.5
dB
PHONE_IN
Step Size 0 dB to 45 dB: (All Steps Tested)
3.0
dB
Input Gain/Attenuation Range
45
dB
AD1816A
4
REV. A
DIGITAL DECIMATION AND INTERPOLATION FILTERS*
Parameter
Min
Typ
Max
Units
Audio Passband
0
0.4
F
S
Hz
Audio Passband Ripple
0.09
dB
Audio Transition Band
0.4
F
S
0.6
F
S
Hz
Audio Stopband
0.6
F
S
Hz
Audio Stopband Rejection
82
dB
Audio Group Delay
12/F
S
sec
Group Delay Variation Over Passband
0.0
s
ANALOG-TO-DIGITAL CONVERTERS
Parameter
Min
Typ
Max
Units
Resolution
16
Bits
Signal-to-Noise Ratio (SNR) (A-Weighted, Referenced to Full Scale)
82
80
dB
Total Harmonic Distortion (THD) (Referenced to Full Scale)
0.011
0.015
%
79
76.5
dB
Audio Dynamic Range (60 dB Input THD+N Referenced to
Full-Scale, A-Weighted)
79
82
dB
Audio THD+N (Referenced to Full-Scale)
0.019
%
76
74.5
dB
Signal-to-Intermodulation Distortion* (CCIF Method)
82
dB
ADC Crosstalk*
Line Inputs (Input L, Ground R, Read R; Input R, Ground L Read L)
95
80
dB
Line to MIC (Input LINE, Ground and Select MIC, Read ADC)
95
80
dB
Line to SYNTH
95
80
dB
Line to CD
95
80
dB
Line to VID
95
80
dB
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
10
%
Interchannel Gain Mismatch (Difference of Gain Errors)
1
dB
ADC Offset Error
22
+15
mV
DIGITAL-TO-ANALOG CONVERTERS
Parameter
Min
Typ
Max
Units
Resolution
16
Bits
Signal-to-Noise Ratio (SNR) (A-Weighted)
83
79
dB
Total Harmonic Distortion (THD)
0.006
0.009
%
85
80.5
dB
Audio Dynamic Range (60 dB Input THD+N Referenced to
Full Scale, A-Weighted)
79
82
dB
Audio THD+N (Referenced to Full Scale)
0.013
0.017
%
78
75.5
dB
Signal-to-Intermodulation Distortion* (CCIF Method)
95
dB
Gain Error (Full-Scale Span Relative to Nominal Input Voltage)
10
%
Interchannel Gain Mismatch (Difference of Gain Errors)
0.5
dB
DAC Crosstalk* (Input L, Zero R, Measure R_OUT;
Input R, Zero L, Measure L_OUT)
80
dB
Total Out-of-Band Energy (Measured from 0.6
F
S
to 100 kHz
at L_OUT and R_OUT)*
45
dB
Audible Out-of-Band Energy (Measured from 0.6
F
S
to 20 kHz
at L_OUT and R_OUT)*
75
dB
MASTER VOLUME ATTENUATORS (L_OUT AND R_OUT, PHONE_OUT)
Parameter
Min
Typ
Max
Units
Master Volume Step Size (0 dB to 46.5 dB)
1.5
dB
Master Volume Output Attenuation Range Span
46.5
dB
Mute Attenuation of 0 dB Fundamental*
80
dB
DIGITAL MIX ATTENUATORS*
Parameter
Min
Typ
Max
Units
Step Size: I
2
S (0), I
2
S (1), Music, ISA
1.505
dB
Digital Mix Attenuation Range Span
94.8
dB
ANALOG OUTPUT
Parameter
Min
Typ
Max
Units
Full-Scale Output Voltage (at L_OUT, R_OUT, PHONE_OUT)
2.8
V p-p
Output Impedance*
570
External Load Impedance*
10
k
Output Capacitance*
15
pF
External Load Capacitance
100
pF
V
REFX
*
2.10
2.25
2.40
V
V
REFX
Current Drive*
100
A
V
REFX
Output Impedance*
6.5
k
Master Volume Mute Click (Muted Analog Mixers), Muted
Output Minus Unmuted Output at 0 dB
5
mV
SYSTEM SPECIFICATIONS*
Parameter
Min
Typ
Max
Units
System Frequency Response Ripple (Line In to Line Out)
1.0
dB
Differential Nonlinearity
1
LSB
Phase Linearity Deviation
5
Degrees
STATIC DIGITAL SPECIFICATIONS
Parameter
Min
Typ
Max
Units
High Level Input Voltage (V
IH
)
2
V
XTALI
2.4
V
Low Level Input Voltage (V
IL
)
0.8
V
High Level Output Voltage (V
OH
), I
OH
= 8 mA
2.4
V
Low Level Output Voltage (V
OL
), I
OL
= 8 mA
0.4
V
Input Leakage Current
10
+10
A
Output Leakage Current
10
+10
A
POWER SUPPLY
Parameter
Min
Typ
Max
Units
Power Supply Range--Analog
4.75
5.25
V
Power Supply Range--Digital
4.75
5.25
V
Power Supply Current
221
mA
Power Dissipation
1105
mW
Analog Supply Current
51
mA
Digital Supply Current
170
mA
Analog Power Supply Current--Power-Down
2
mA
Digital Power Supply Current--Power-Down
24
mA
Analog Power Supply Current--RESET
0.2
mA
Digital Power Supply Current--RESET
10
mA
Power Supply Rejection (100 mV p-p Signal on Both Analog and Digital
Supply Pins, Measured at ADC and Line Outputs)
40
dB
CLOCK SPECIFICATIONS*
Parameter
Min
Typ
Max
Units
Input Clock Frequency
33
MHz
Recommended Clock Duty Cycle
25
50
75
%
Power-Up Initialization Time
500
ms
REV. A
5
AD1816A
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