AV2722 データシートの表示（PDF） - Unspecified

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AV2722

AUDIO CODEC WITH HEADPHONE DRIVER AND PROGRAMMABLE SAMPLE RATES

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AV2722 (Preliminary)

Pin No. Pin Name

Type

Description

20 AINL

Analog Input

Left channel line/microphone input

21 HPDET Digital Input

Headphone is plugged in or not plugged in indicator. The polarity of

this signal can be inverted or not inverted, which is controlled by pro-

gramming bit HPDETMODE (creg4[2], address 04 hex), a logic “low”

inverts the polarity of HPDET into the chip.

22 MODE

Digital Input

I2C or MPU control interface selection. If MODE is logic “high”, the

chip is using MPU for chip programming. If MODE is logic “low”, the

chip is using I2C for chip programming. MODE can be no-connect

for MPU control due to the internal “pullup” resistor.

23 CSB

Digital Input

3-wire MPU chip select, active low.

24 SDA

Digital Input/Output 3-wire MPU data input /output or 2-wire I2C data input/output

25 SCL

Digital Input

3-wire MPU clock input /2-wire I2C clock input

26 RS/

Digital Input

Active low chip reset

27 XCK

Digital Input

Chip clock input. The clock rate of XCK depends on the audio sam-

pling rate, regular audio or USB audio.

28 VSS

Ground

Ground for digital circuits

ELECTROSTATIC DISCHARGE SENSITIVITY

This integrated circuits is manufactured on a CMOS process. It can be damaged by ESD. AVS recommends that all integrated

circuits be handled with appropriate ESD precautions. Improper handling and installation procedures can cause damage to the

device.

4-29

January 22, 2004

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