LG KG270 Service Manual - Page 15

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3. TECHNICAL BRIEF 3.1.2 Features ] Baseband • High performance fixed-point TEAKlite DSP • C166S high performance microcontroller • There are several Interfaces: - I2S interface for DAI connections (for Tape Approval) - High Speed SSC Interface for connection of external peripherals - SIM Interface - Keypad Interface (6x4 or 5x5 keys) - EBU for external RAM/FLASH connection - Asynchronous serial interface - JTAG Interface - Black & white and color displays are supported - PWM source to drive vibrator - Keypad and display backlight supported. ] Receiver • Constant gain, direct conversion receiver with fully integrated blocking filter • Two integrated LNAs • No need of interstage and IF filter • Highly linear RF quadrature demodulator • Programmable DC output level • Very low power budget. ] Transmitter • Digital Sigma-Delta modulator for GMSK modulation, typical -163.5 dBc/Hz@20 MHz • Single ended outputs to PA, Pout = +3.5 dBm • Very low power budget. ] RF-Synthesizer • Σ∆Synthesizer for multi-slot operation • Fast lock-in times (< 150 •Ïs) • Integrated loop filter • RF Oscillator • Fully integrated RF VCO. ] Crystal Oscillator • Fully digital controlled crystal oscillator core with a highly linear tuning characteristic. - 16 -

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3. TECHNICAL BRIEF
- 16 -
3.1.2 Features
]
Baseband
• High performance fixed-point TEAKlite DSP
• C166S high performance microcontroller
• There are several Interfaces:
- I2S interface for DAI connections (for Tape Approval)
- High Speed SSC Interface for connection of external peripherals
- SIM Interface
- Keypad Interface (6x4 or 5x5 keys)
- EBU for external RAM/FLASH connection
- Asynchronous serial interface
- JTAG Interface
- Black & white and color displays are supported
- PWM source to drive vibrator
- Keypad and display backlight supported.
]
Receiver
• Constant gain, direct conversion receiver with fully integrated blocking filter
• Two integrated LNAs
• No need of interstage and IF filter
• Highly linear RF quadrature demodulator
• Programmable DC output level
• Very low power budget.
]
Transmitter
• Digital Sigma-Delta modulator for GMSK modulation, typical -163.5 dBc/Hz@20 MHz
• Single ended outputs to PA, Pout = +3.5 dBm
• Very low power budget.
]
RF-Synthesizer
•
Σ∆
Synthesizer for multi-slot operation
• Fast lock-in times (< 150 •Ïs)
• Integrated loop filter
• RF Oscillator
• Fully integrated RF VCO.
]
Crystal Oscillator
• Fully digital controlled crystal oscillator core with a highly linear tuning characteristic.