LG Electronics U250 MSM6245 device audio processing features, MSM6245 microprocessor subsystem

3. TECHNICAL BRIEF

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

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