LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. HW Circuit Description
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3.1.2 Features
The LOCOSTO device is an integrated solution that embeds a digital baseband(DBB) and a digital
radio processor (DRP) on the same die. The LOCOSTO device targets solutions for GSM/GPRS (low-
cost global system for mobile communications/general packet radio service).
The DRP is a digital radio-frequency (RF) transceiver that supports up to a GPRS class12. The DRP is
designed for quad-band operation, supporting both the European and the US bands (E-GSM 900 and
DCS 1800 bands, GSM850 and PCS 1900 bands, respectively).
The DBB supports the processing of GSM radio signals in the switching circuit mode and the packet
data mode (GPRS) for up to class 10, including evolutions such as the SAIC and localization system
(A-GPS) in compliance with the European Telecommunications Standards Institute specification.
The LOCOSTO silicon process is a 90-nm digital CMOS technology.
The LOCOSTO device includes two versions: LOCOSTO and LOCOSTO Lite.
The LOCOSTO Lite device does not include the camera interface and the GPRS.
LOCOSTO offers the following features:
■
Dual processors:
- 104-MHz ARM7TDMI® microprocessor unit (MPU)
- 104-MHz customized digital signal processor (cDSP) c54x
■
Internal memory:
- 154KW DSP read-only memory (ROM)
- 30KW DSP static random-access memory (SRAM)
- 2.5Mb MPU SRAM
- 1.5Mb MPU ROM
■
External memory support:
- 1.8/3 V subscriber identity module (SIM) I/F
- Direct memory access (DMA) to external memory
- Burst mode, page-mode external memory: NAND and NOR flash and SRAM (frame buffer)
■
Hardware security
- Flash content
- International mobile equipment identity (IMEI) protection
- SIM lock
Содержание CP150
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