LG GS205 Service Manual page 28

SIM/USIM Controller with hardware T=0/T=1 protocol control
3 UARTs with hardware flow control and speed up to 921600 bps
IrDA modulator/demodulator with hardware framer supports SIR mode of operation
Real Time Clock (RTC) operating with a separate power supply
General Purpose I/Os (GPIOs)
2 Sets of Pulse Width Modulation (PWM) Output
Alerter Output with Enhanced PWM or PDM
4~10 external interrupt lines
Connectivity
Full-speed USB 2.0 Device controller
Multi Media Card/Secure Digital Memory Card/Memory Stick/Memory Stick Pro host
controller
Security
Supports security key for code protection
56-bit unique/secret chip ID
Power Management
Power Down Mode for analog and digital circuits
Processor Sleep Mode
Pause Mode of 32KHz clocking at Standby State
7-channel Auxiliary 10-bit A/D Converter for charger and battery monitoring and photo
sensing
Test and Debug
Built-in digital and analog loop back modes for both Audio and Baseband Front-End
DAI port complying with GSM Rec.11.10
JTAG port for debugging embedded MCU
3.1.3 MODEM Features
Radio Interface and Baseband Front End
GMSK modulator with analog I and Q channel outputs
10-bit D/A Converter for uplink baseband I and Q signals
14-bit high resolution A/D Converter for downlink baseband I and Q signals
Calibration mechanism of offset and gain mismatch for baseband A/D Converter and D/A
Converter
10-bit D/A Converter for Automatic Power Control
13-bit high resolution D/A Converter for Automatic Frequency Control
Programmable Radio RX filter
2 Channels bi-directional Baseband Serial Interface (BSI) with 3-wire or 4-wire control
10-Pin Baseband Parallel Interface (BPI) with programmable driving strength
Multi-band support
Voice and Modem CODEC
Dial tone generation
Voice Memo
Noise Reduction
Echo Suppression / Echo Cancellation
Advanced Sidetone Oscillation Reduction
Digital sidetone generator with programmable gain
Two programmable acoustic compensation filters
GSM/GPRS quad vocoders for adaptive multirate (AMR), enhanced full rate (EFR), full rate
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