PCF5081

The PCF5081 is an integral part of the complete chip-set provided by Philips for the pan-European digital mobile cellular telephone system. It is a key element for GSM, performing all the baseband signal processing tasks. PCF5081 is intended for use in GSM handsets. PCF5081 is also considered as the first device of an entire product line introduced as PCF508x. This family provides powerful compulational capabilities which supports the highly sophisticated baseband signal processing required by GSM.

There are some main features of PCF5081 as follows: (1)16-bit fixed point double precision architecture; (2)40 MHz master clock; 20 MHz internal clock (50 ns ins cycle); (3)fully pre-programmed modules for GSM baseband tasks; (4)dedicated processor optimized for: equlization function;channel coder/decoder; encryption/decryption; (5)power-down mode with wake-up facility; (6)several leve;s of interrupts; (7)event counters; (8)asynchronous serial I/O-X; (9)sophisticated serial I/O-Y supporting both asynchronous and synchronous communication (i.e. GCI, PCM highwat etc.); (10)8-bit parallel system controller interface supporting both request and acknowledge driven communication; (11)boundary scan facility; (12)build-in self test (BIST); (13)externalmemory interfaces for both data and program memory; (14)self-aligned-contacts CMOS (SACMOS) technology with very high design density.

The PCF5081 is designed to be used in the GSM mobile station. All the necessary baseband signal procesing algorithms specified by the GSM-recommendations pertaining to the mobile station can be performed by means of this single chip. PCF5081 has on-chip memory (ROM) containing program modules for the different tasks implemented in firmware. A suitable amount of data-RAM/ROM is provided on-chip.