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DECT Digital Circuit for Basestations

PMB 27251 / 2

DECT Digital Circuit for Basestations
PMB 27251 / 2
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.
Package P-TQFP-128-1 (SMD)
Data Port (32 kbit / s)
Crystal 20.736 MHz
Clocks Input Data RAM
Timers / RF-Interf. Serial In CRC
Synchronization Descramble TDMA Data 1.152 Mbit / s Scramble
Speech Data (PMB 2920)
Interpolation Decimation
Codec Filter
ADPCM Transcoder
Control RAM Internal Switch
Output Data RAM Serial Out Control RAM CRC
Burst-Error-Concealment Tone Generation
Burst Mode Logic
Encryption Decryption Power Control
Internal ROM 64 KBytes 8-Bit CPU Internal RAM 4 KBytes
Port X Keypad Timers Tonedect. Microcontroller Unit
Port 0 Addit. I C Bus Interrupts
D A Watchdog
ITB08461
Block Diagram PMB 27252
Siemens Aktiengesellschaft