LG -A290 Service Manual page 18

3. TECHNICAL BRIEF
3.1.15 Voice Interface and Voice Front End
• Two microphone inputs sharing one low noise amplifier with programmable gain and automatic gain control(AGC)
mechanism.
• Voice power amplifier with programmable gain.
•  order Sigma-delta A/D Converter for voice uplink path.
nd
• D/A Converter for voice downlink path.
• Supporter for voice downlink path.
• Supports half-duplex hands-free operation.
• Compliant with GSM 03.05
3.1.16 LCD Interface
• Dedicated Parallel Interface supports  external 8/9 bit Parallel Interface, and Serial interface for LCM.
3.1.17 LCD Controller
• Supports LCM format: RGB33, RGB444, RGB565, RGB666, RGB888.
• Supports LCD module with maximum resolution up to 40x30 at 16bpp.
• Capable of combining display memories with up to 4 blending layers.
• Accelerated Gamma correction with programmable gamma table.
• Supports hardware display rotation for each layer.
3.1.18 Audio CODEC
• Wavetable synthesis with up to 64 tones.
• Advanced wavetable synthesizer capable of generating and 47 sets of percussions.
• PCM Playback and Record.
• Digital Audio Playback.
3.1.19 Audio Interface and Audio Front End
• Supports IS interface.
• High resolution D/A Converters for Stereo Audio playback.
• Stereo analog input for stereo audio source.
• Analog multiplexer for Stereo Audio.
• FM Radio Recording.
• Stereo to Mono Conversion.
• HE-AAC decode support.
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