UPD9930G-22 Ver la hoja de datos (PDF) - NEC => Renesas Technology

Número de pieza

componentes Descripción

Fabricante

UPD9930G-22

LINEAR CODEC FOR DIGITAL CELLULAR TELEPHONE

NEC => Renesas Technology 

(15 to 33 dB)

MIXI

MICO

MICI–

MICI+

Microphone

amplifier

–

+

(to XACOMO)

XAUXO

(0 to 10 dB)

XAUXI–

Accessory input

amplifier

–

+

to Vref

RAUXO

Post Filter 1

(Accessory output

amplifier)

0 dB fix

Pre-Filter

+ Mixer

0 or –3 dB

REC1O

REC2I–

Post Filter 2

(Receiver amplifier 1)

0 to -31 dB

(1 dB steps)

Receiver drive amplifier

(Receiver amplifier 2)

REC2O–

–

+

to Vref

REC2O+

XACOMI

XACOMO

RACOMO

RACOMI

–

+

to Vref

Vcombuff

Vref

A/D

D/A

Sign code

output

Digital signal processor

PLL

Voice send

Digital

Gain Cont.

0 to –2.8 dB

(0.4 dB steps)

Transmit

BPF

DSP

INTERFACE

Receive

LPF

Voice receive

Digital

Gain Cont.

0 to –2.4 dB

(0.8 dB steps)

Tone

Gain Cont.

0 to –30 dB

(1 dB steps)

–38.5 dB

Tone

Generator

MICRO-

CONTROLLER

INTERFACE

Tone Interval

Generation

DAI

(GSM11. 10)

Low-current drive LED

RESETB

REQB

FSYNC

(8 kHz)

SCLK

(256 kHz)

SEN

SO

SI

DSPSEL

MCLK

MSTR

MDAT

DCLK

DO

DI

TC1

TC2

DRSTB

Share Link: