MAXAUDINT1 datasheet(3/22 Pages) MAXIM

3 / 22 page

Maxim Integrated │ 3

www.maximintegrated.com

Evaluates: MAXAUDINT1

Audio Interface 1

Mode of Operation

The AUDINT1 board can be evaluated in either demon-

stration (DEMO) mode or evaluation (EVAL) mode. The

mode of operation is set by switch SW1, which is located

between the two USB ports.

DEMO mode is for situations when a PC is not available

or does not have the required evaluation software. EVAL

mode is for all other situations, as listed in Table 1. For

cases where the DEV board is not I2C capable, either

mode can be used with a single USB connection (USB2).

DEMO Mode

In demonstration (DEMO) mode, the AUDINT1 board is

intended to be evaluated with one USB connection (USB2).

This mode of operation is intended for on-the-fly evalua-

tions, where a PC may not be available or has not been

setup with the required evaluation software. To utilize this

mode for I2C device configuration, the MAXQ2000 requires

customized firmware. The customized firmware contains

device-specific instructions that automatically configure

the device on power-up and/or on the pressing of the SW2

pushbutton.

Although DEMO mode is only recommended for one spe-

cific case (I2S and I2C without software), it can be set for

other cases as listed in Table 1. For these other cases,

custom MAXQ2000 firmware is not required.

EVAL Mode

In evaluation (EVAL) mode, the AUDINT1 board can be

evaluated with one or two USB connections, depending

on the needs of the companion DEV board (Table 1). The

main use case for EVAL mode is when the EV system

(AUDINT1 board + DEV board) is evaluated with a PC

that has been setup with the appropriate device-specific

evaluation software.

As shown in Table 1, there are other situations in which

the EVAL mode can be utilized. It can be used, and is rec-

ommended, when only USB audio streaming is needed.

This reduces the load placed on the USB2 port by isolat-

ing the unused I2C interface from the USB2 power rail.

It can also be used in cases where USB audio stream-

ing is not needed and a PC is not available or has not

been setup with the device-specific evaluation software.

As in DEMO mode, this case would require customized

MAXQ2000 firmware to perform the automatic I2C device

configuration (on power-up and/or on the pressing of the

SW2 pushbutton).

Power Supply

The AUDINT1 board is powered by a host PC’s USB

power (+5V) and does not require any external supplies.

The power distribution across the board is determined by

the mode of operation, which is set by the SW1 switch

(Table 1). In the recommended DEMO mode, only one

I2S

CAPABLE

DEV BOARD

I2C

CAPABLE

DEV BOARD

USING

EVALUATION

SOFTWARE

MODE

(SW1)

USB

CONNECTIONS

FUNCTIONALITY

Yes

EVAL*,

DEMO

USB1 + USB2

USB audio streaming + I2C device configura-

tion using evaluation software

Yes

DEMO*

USB2

Automatic I2C device configuration + USB

audio streaming

EVAL

USB1 + USB2

Yes

EVAL

USB1

I2C device configuration using evaluation

software

Yes

EVAL

USB1

Automatic I2C device configuration

Yes

—

EVAL*, DEMO

USB2

USB audio streaming

*Recommeded mode of operation.

MODE

LOGIC RAILS

(+1.8V, +3.3V, +1.2V,

3V3, 2V5)

USB-TO-I2C

CIRCUIT

LOGIC RAILS

(VDD18, VDD33,

+1.0V)

USB-TO-I2S

CIRCUIT

CLOCK CIRCUITS

EVAL*

USB1

USB2

DEMO

USB2

Table 1. USB Power Distribution

Table 2. Mode Of Operation

*Default position.

MAXAUDINT1 Datasheet(PDF) 3 Page - Maxim Integrated Products

MAXAUDINT1 Datasheet(HTML) 3 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Datasheet Download

Link URL