LG U250 Service Manual page 38

3.8.6. MSM6245 device audio processing features
■ Integrated wideband stereo CODEC
❏ 16-bit DAC with typical 88 dB dynamic range
❏ Supports sampling rates up to 48 kHz on the speaker path and 16 kHz on the microphone path
■ VR- Voice mail + voice memo
■ Acoustic echo cancellation
■ Audio AGC
■ Audio Codecs: AMR-NB, AAC, AAC Plus, Enhanced AAC Plus, Windows Audio v9, Real Audio 8
(G2)
■ Internal vocoder supporting AMR, FR, EFR, and HR
3.8.7. MSM6245 microprocessor subsystem
■ Industry standard ARM926EJ-S embedded microprocessor subsystem
❏ 16 kB instruction and 16 kB data cache
❏ Instruction set compatible with ARM7TDMI®
❏ ARM version 5TEJ instructions
❏ Higher performance 5 stage pipeline, Harvard cached architecture
❏ Higher internal CPU clock rate with on-chip cache
■ Java hardware acceleration
■ Enhanced memory support
❏ 75 MHz and 90 MHz bus clock for SDRAM
❏ 32-bit SDRAM
❏ Dual memory buses separating the high-speed memory subsystem (EBI1) from low-speed
peripherals (EBI2) such as LCD panels
❏ 1.8 memory interface support for EBI1 and 1.8 V or 2.6 V memory interface support EBI2
❏ NAND FLASH memory interface
- 8/16-bit data I/O width NAND flash support
- 1- or 4-bit ECC
- 512-byte/2KB page-size support
- 2 chip selects supported for NAND Flash
❏ Boot from NAND
❏ Low-power SDRAM (LP-SDRAM) interface
■ Internal watchdog and sleep timers
3.8.8. Supported interface features
■ USB On-the-Go core supports both slave and host functionality
■ Three universal asynchronous receiver transmitter (UART) serial ports
■ USIM controller (via UART)
■ Integrated 4-bit secure digital (SD) controller for SD and Mini SD cards
■ Parallel LCD interface
■ General-purpose I/O pins
■ External keypad interface
3. TECHNICAL BRIEF
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