MT6225 データシートの表示（PDF） - MediaTek Inc

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MT6225

GSM/GPRS Baseband Processor

MediaTek Inc 

MT6225 GSM/GPRS Baseband Processor Data Sheet Revision 1.00

1.2 MODEM Features

Radio Interface and Baseband Front End

GMSK modulator with analog I and Q channel

outputs

10-bit D/A Converter for uplink baseband I and Q

signals

14-bit high resolution A/D Converter for downlink

baseband I and Q signals

Calibration mechanism of offset and gain

mismatch for baseband A/D Converter and D/A

Converter

10-bit D/A Converter for Automatic Power

Control

13-bit high resolution D/A Converter for

Automatic Frequency Control

Programmable Radio RX filter

2 Channels bi-directional Baseband Serial

Interface (BSI) with 3-wire or 4-wire control

10-Pin Baseband Parallel Interface (BPI) with

programmable driving strength

Multi-band support

Voice and Modem CODEC

Dial tone generation

Voice Memo

Noise Reduction

Echo Suppression / Echo Cancellation

Advanced Sidetone Oscillation Reduction

Digital sidetone generator with programmable

gain

Two programmable acoustic compensation filters

GSM/GPRS quad vocoders for adaptive multirate

(AMR), enhanced full rate (EFR), full rate (FR)

and half rate (HR)

FR error concealment

GSM channel coding, equalization and A5/1, A5/2

and A5/3 ciphering

GPRS GEA1, GEA2 and GEA3 ciphering

Programmable GSM/GPRS Modem

Packet Switched Data with CS1/CS2/CS3/CS4

coding schemes

GSM Circuit Switch Data

GPRS Class 12

Voice Interface and Voice Front End

Two microphone inputs sharing one low noise

amplifier with programmable gain and automatic

gain control (AGC) mechanism

Voice power amplifier with programmable gain

2nd order Sigma-Delta A/D Converter for voice

uplink path

D/A Converter for voice downlink path

Supports half-duplex hands-free operation

Compliant with GSM 03.50

11/377

MediaTek Inc. Confidential

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