PCD50957H/E00

Product Summary

The PCD50957H/E00 is a single-chip controller, designed for use in Digital Enhanced Cordless Telecommunications systems (DECT). The PCD50957H/E00 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 PCD50957H/E00 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 IOMa-2 data buffers and vice versa. In both modes the DSP controls the bidirectional data flow from the radio interface and the IOMa-2 interface. The 80C51 controls the DECT protocol and the IOMa-2 interface.

Features

PCD50957H/E00 features: (1)+2.7 to 5 V port (P0 to P3) interface; (2)TDMA frame (de)multiplexing, transmission or reception can be programmed for any slot; (3)Ciphering, scrambling, CRC checking/generation and; (4)protected B-fields; (5)Speech and data buffering space for six handsets; (6)Local call and B-field loop-back; (7)Two interrupt lines for BML and DSP to interrupt 80C51; (8)On-chip, three channel time-multiplexed 8-bit Analog-to-Digital Converter (ADC) for RSSI measurement, one for battery voltage measurement and one channel available for other purposes; (9)On-chip 8-bit Digital-to-Analog Converter (DAC) for electronic potentiometer function; (10)Phase error measurement and phase error correction by hardware; (11)DACs and ADCs for dynamic earpiece and dynamic or electret microphone; (12)On-chip reference voltage; (13)On-chip supply for electret microphone.

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