PCD5095 Просмотр технического описания (PDF) - Philips Electronics

Номер в каталоге

Компоненты Описание

Список матч

PCD5095

DECT baseband controller

Philips Electronics 

Philips Semiconductors

DECT baseband controller

Objective specification

PCD5095

6 FUNCTIONAL DESCRIPTION

The PCD509x is a family of single-chip controllers,

designed for use in Digital Enhanced Cordless

Telecommunications systems (DECT). The family is

designed for minimum component-count and minimum

power consumption. All controllers include an embedded

80C51 microcontroller with on-chip memory and I2C-bus

interface. The Philips DECT RF interface is implemented.

The Burst Mode Logic (BML) performs the time-critical

MAC layer functions for applications in DECT handsets

and base stations. The ADPCM transcoding is in

compliance with the CCITT recommendation G.721 and

includes receive and transmit filters.

The PCD5095 is designed for business systems, PABX

and WLL. Two modes can be selected: bidirectional

conversion of three ADPCM channels based on linear

PCM format, the second mode copies four ADPCM

samples, without data processing, into two IOM®-2 data

buffers and vice versa. In both modes the DSP controls

the bidirectional data flow from the radio interface and the

IOM®-2 interface. The 80C51 controls the DECT protocol

and the IOM®-2 interface.

The data flow between radio, DSP and IOM®-2 is

described in the “PCD5095 DSP user manual”. Basically

the System Data RAM (SDR), the shared memory with

inbound and outbound speech buffers, is the interface to

the DSP and to the radio. Depending on the selected

mode the DSP processes the data stored in the SDR. The

speech buffers are 40 bytes long and each buffer can

hold 80 ADPCM-coded speech samples.

handbook, full pagewidth

HANDSET

(PCD5091) RF

HANDSET

(PCD5091)

RF

DECT CORDLESS PABX

IOM-2

INTERFACE

RF PCD5095

PABX

MGL189

Fig.3 PCD5095 for PABX.

1997 Nov 19

9

Share Link: