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AD1816

SoundPort® Controller

Analog Devices 

AD1816A

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 I2S serial ports. The AD1816A on-chip

Plug and Play routine provides configuration services for all in-

tegrated logical devices. Using an external E2PROM allows the

AD1816A to decode up to two additional external user-defined

logical devices such as modem and CD-ROM.

TABLE OF CONTENTS

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

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. I2S Serial Port Timing . . . . . . . . . . . . . . . . . . . . . . 7

Figure 8. Reset Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 9. Serial Interface Right-Justified Mode . . . . . . . . . . 17

Figure 10. Serial Interface I2S-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

–2–

REV. A

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