Digital Baseband - LG F1200 Service Manual

3. TECHNICAL BRIEF

3.5 Digital Baseband

(1) General Description
Calypso-Plus device is an evolution of Calypso (C035) device integrating hardware
enhancements targeting the implementation of a new range of user's applications. It supports
the digital baseband processing of GSM radio signals in switching circuit mode and packet data
mode up to class 12 in compliance with the ETSI specification of the GPRS protocol. The
functional enhancement of the Calypso-Plus offer an increase computing performance of both
ARM7 based MCU and C54x based DSP sub-system in addition to numerous new connectivity.
The enhanced computing performances mainly rely on :
[MCU Sub-system]
- 5.5Mbit Internal SRAM (with 0.5Mb shared with DSP)
- DMA to internal SRAM
- Page Mode Memory Interface
- Sizable 6 Chip-Select
- 2 Generic Purpose external interrupts
- Patch Unit
Figure 7. Top level block diagram of the Calypso-Plus
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