CM102-A/102S 查看數據表（PDF） - C-Media Electronics

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CM102-A/102S

USB 2CH Audio Controller for Speaker

C-Media Electronics 

CM102-A+/102S+

USB Stereo Audio Chip for Speaker Integrated

3.3 PIN SIGNAL DESCRIPTIONS

Pin # Symbol

Type

Description

Power Amplifier Control Input, Connect to a Switch or

Pull-High in Normal Operation.

1

PAEN

DI, ST

H: Enable Power Amplifier (Normal Mode)

L: Disable Power Amplifier

2

GPIO

DIO, 8mA, ST,

SR, PD

GPIO

Pin,

Controlled

via

Vender

Specific

Command

3

XO

AO

Output Pin for 12MHz Oscillator

4

XI

AI

Input Pin for 12MHz Oscillator

5 DVDD5V

P

5V Power Supply

6

REGV

AO

Regulator output 3.3v

7

USBDP

AIO

USB Data D+

8

USBDM

AIO

USB Data D-

9

DVSS

P

Digital Ground

10

TEST DI, ST, PD Test Mode Select Pin, Pull-Down in normal Operation

11

VREF

Connecting to External Decoupling Capacitor for

AO

Embedded Bandgap Circuit; 2.25V Output

12 VOLADJ

Analog Volume Control Input from external VR circuit.

AI

0 ~ 2.25V: +12 dB ~ 3 dB / mute

3.5 ~ 5V: 0 dB

13

AVDD

P

5V Power Supply for Analog Circuit

14

LOL

AO

Line Out Left Channel

15

LOR

AO

Line Out Right Channel

Date: 09/25/2005

-8-

Version: 1.01

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