LG 410G Service Manual page 16

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
□ Peripheral interfaces
- Vibrator PWM control signal
- Universal serial bus (USB) 2.0 full-speed client
- Keypad
- Universal asynchronous receiver/transmitter (UART)
- Multichannel serial interface (MCSI)
- Bluetooth
- Camera
- Primary liquid-crystal display (LCD): 8-bit parallel interface Up to QVGA (quarter video graphics
array) 256K colors
- Secondary LCD: Serial interface
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Only for training and service purposes
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3. H/W Circuit Description
LGE Internal Use Only