Analog Devices ADSP-2192 specifications Industry standard AC’97 serial interface AC-Link

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For current information contact Analog Devices at (781) 461-3881

October 2000

ADSP-2192

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AC’97 2.1 External Codec Interface

PCI 2.2 HostIInterface

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The industry standard AC’97 serial interface (AC-Link)

The ADSP-2192 includes a 33MHz, 32 bit bus master PCI

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incorporates a 7-pin digital serial interface that links com-

interface that is compliant with revision 2.2 of the PCI spec-

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pliant codecs to the ADSP-2192. The ACLink implements

ification. This interface supports the high data rates.

USB 1.1 Host Interface.

a bi-directional, fixed rate, serial PCM digital stream. It

handles multiple input and output audio streams as well as

The ADSP-2192 USB interface enables the host system to

control and status register accesses using a time division

configure and attach a single device with multiple interfaces

multiplex scheme.

and various endpoint configurations. The advantages of this

Serial EEPROM Interface

design include:

• Programmable descriptors and class-specific command

The Serial EEPROM for the ADSP-2192 can overwrite the

following information which is returned during the USB

interpreter.

GET DEVICE DESCRIPTOR command. During the

• An on-chip 8052 compatible MCU allows the user to

Serial EEPROM initialization procedure, the DSP is

soft download different configurations and support

responsible for writing the USB Descriptor Vendor ID,

standard or class-specific commands.

USB Descriptor Product ID, USB Descriptor Release

• Total of 8 user-defined endpoints provided. Endpoints

Number, and USB Descriptor Device Attributes registers

can be configured as either BULK, ISO, or INT and

to change the default settings.

can be grouped and assigned to any interface.

All descriptors can be changed when downloading the

Sub-ISA Interface

RAM-based MCU re-numeration code, except for the

In systems which combine the ADSP-2192 chip with other

Manufacturer and Product, which are supported in the

CONFIG DEVICE and cannot be overwritten or changed

devices on a single PCI interface, the ADSP-2192 Sub-ISA

by the Serial EEPROM.

mode is used to provide a simpler interface which bypasses

• Vendor ID (0x0456 ADI)

the ADSP-2192’s PCI interface. In this mode the Combo

Master assumes all responsibility for interfacing the func-

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Product ID (0x2192)

tion to the PCI bus, including provision of Configuration

• Device Release Number (0x0100)

Space registers for the ADSP-2192 system as a separate

• Device Attributes (0x80FA): SP (1=self-powered,

PnP function. In Sub-ISA Mode the PCI Pins are reconfig-

0=bus-powered, default=0); RW (1=have remote

ured for ISA operation.

wake-up capability, 0=no remote wake-up capability,

CardBus Interface

deafult=0); C[7:0] (power consumption from bus

The CardBus standard provides higher levels of perfor-

expressed in 2mA units; default = 0xFA 500mA)

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Manufacturer (ADI)

mance than the 16-bit PC Card standard. For example,

32-bit CardBus cards are able to take advantage of internal

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Product (ADI Device)

bus speeds that can be as much as four- to six-times faster

Internal Interfaces

than 16-bit PC Cards. This design provides for a compact,

rugged card that can be inserted completely within its host

The ADSP-2192 provides three types of internal interfaces:

computer without any external cabling.

registers, codec, and DSP memory buses. The following

Since CardBus performance attains the same high level as

sections discuss those interfaces.

the host platform's internal (PCI) system bus, it is an excel-

Register Interface

lent way to add high speed communications to the notebook

The register interface allows the PCI interface, USB inter-

form factor. In addition, CardBus PC Cards operate at a

power-saving 3.3 volts, extending battery life in most

face, and both DSPs to communicate with the I/O

configurations.

Registers. These registers map into DSP, PCI, and USB I/O

This new 32-bit CardBus technology provides up to

spaces.

132Mbytes per second of bandwidth. This performance

Register Spaces

makes CardBus an ideal vehicle to furnish the demands of

Several different register spaces are defined on the

high throughput communications such as ADSL.

ADSP-2192, as described in the following sections.

CardBus PC Cards generate less heat and consume less

PCI Configuration Space

power. This is attained by:

These registers control the configuration of the PCI Inter-Y

• Low voltage operation at 3.3V.

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face. Most of these registers are only accessible via theAPCI

• Software control of clock speed.

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Bus although a subset is accessible to the DSP for configu-L

• Advanced power management mechanism

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ration during the boot.

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This information applies to a product under development. Its characteristics and specifications are subjectPto change with-

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out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed toEin writing.

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