pmb27251 Infineon Technologies Corporation, pmb27251 Datasheet

pmb27251

Manufacturer Part Number

pmb27251

Description

Dect Digital Circuit Basestations

Manufacturer

Infineon Technologies Corporation

Datasheet

1.PMB27251.pdf (1 pages)

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PMB27251

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SIEMENS

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SIEMENS

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SIEMENS

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pmb27251-V1.3

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INFINEON

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pmb27251F

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SIEMENS

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Download datasheet (17Kb)

DECT Digital Circuit for Basestations

General Description

The DECT-Digital Circuit for Basestations is one of the

devices of the Siemens chip set for the digital cordless

telephone specified by the DECT standard.

The device designed for single cordless fixed stations is a

highly integrated circuit and realizes most of the system

functions needed in such an equipment. The circuit contains

a digital signal processor, an 8-bit 80C51-compatible

microcontroller and the burst mode controller. Furthermore

the circuit handles the interfacing of the different components

of the DECT chipset.

The device is fabricated using Siemens advanced CMOS

technology and wilI be available in a 128 pin package.

Siemens Aktiengesellschaft

Speech Data

(PMB 2920)

Block Diagram PMB 27252

Internal ROM

Internal RAM

Interpolation

Decimation

64 KBytes

4 KBytes

Burst-Error-Concealment

Tone Generation

DSP

Codec

Filter

8-Bit CPU

ADPCM

Trans-

coder

Microcontroller Unit

Data Port

(32 kbit/s)

Type

PMB 27251/2

Features

• 8-bit C with integrated ROM/RAM

• 32 bit/s ADPCM-transcoder

• Digital filtering and gain stages

• Echocancellation

• Burst mode controller

• Internal calls possible

• Power supply voltage: 5 V 5 %

• Low power consumption

• Advanced low power CMOS technology

• Encryption

• PMB 27251: 6 K RAM

• PMB 27252: 64 K ROM, 4 K RAM

Output Data RAM

Tonedect.

Input Data RAM

Keypad

Clocks

Timers

Port X

Internal Switch

Control RAM

Burst Mode Logic

Crystal 20.736 MHz

Port 0

Interrupts

Addit.

RF-Interf.

Timers /

Serial Out

Serial In

CRC

C Bus

Watchdog

Package

P-TQFP-128-1 (SMD)

Encryption

Decryption

Scramble

scramble

Synchro-

nization

Control

Power

De-

PMB 27251/2

TDMA Data

1.152 Mbit/s

RSSI

ITB08461

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