GENERAL DESCRIPTION

The PCD5042 DECT Burst Mode Controller (BMC) is a custom IC that performs the DECT Physical Layer and MAC Layer time-critical functions, for use in DECT base station products which comply with the following standards:

? DECT CI part 2: Physical layer (DE/RES 3001-2)

? DECT CI part 3 : Medium Access Control layer (DE/RES 3001-3)

? DECT CI part 7: Security features for DECT (DE/RES 3001-7)

? DECT CI part 9: Public Access Profile (DE/RES 3001-9).

The PCD5042 has interfaces to:

? Up to 4 ADPCM CODECs in a simple base station (with up to 4 analogue lines) without glue logic

? n x 64 kbits/s highway, where n = 1 to 32, for systems requiring more than 4 connections to the network

? A radio transceiver; the interface is fully decoded, and includes power-down signals

? An external microcontroller.

The PCD5042 is designed to be connected to an ADPCM CODEC (Philips’ PCD5032, for example) and an 80C51-type microcontroller. Other microcontrollers (e.g. 68000) and CODECs can also be supported.

FEATURES

? On-chip pre-programmed Communication Controller with embedded firmware for implementation of Traffic Bearer Control (TBC), MAC message handling, scanning, and control of the device’s other functional units.

? Fixed Part (FP) modes

? TDMA frame (de)multiplexing

? Encryption

? Scrambling

? CRC generation and checking

? Beacon transmission control (by P00 packets)

? On-chip comparator for receive data slicer function (only available in the LQFP80 package)

? Switches up to12 active speech channels from speech interface to 1152 kbits/s. radio interface, and vice versa

? Dual channel speech/data capability

? RSSI measurement, with on-chip 6-bits peak/hold detector

? Local call switching for up to 6 internal calls on RF side/local call switching on speech side.

? Quality control report

? Digital Phase Locked Loop (DPLL)

? Synchronization (handset to active bearer, base station to cluster of RFPs)

? Seamless handover procedure

? Fast (hardware) and slow (software) mute function

? 1 kbyte extended RAM memory

? On-chip crystal oscillator (13.824 MHz)

? Programmable microcontroller clock frequency

? Programmable interrupts

? Watchdog with two programmable time-outs

? Low power consumption in standby mode

? Low supply voltage (2.7 to 5.5 V)

? SACMOS technology