LG KT610, Руководство по обслуживанию

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3. TECHNICAL BRIEF
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.9 Subsystem of STn8810
3.9.1 ARM926EJ processor
The STn8810 CPU is an ARM926EJ reduced instruction set computer (RISC) processor.
This 32-bit processor core supports 32-bit ARM® and 16-bit Thumb instruction sets, enabling the user
to trade off between high performance and high code density.
The cached ARM CPU features a memory management unit (MMU) and is clocked at 264 MHz.
It has a 32-Kbyte instruction cache and a 16-Kbyte data cache, and supports the Jazelle¢‚ extensions
for Java acceleration. It also includes an embedded trace module (ETM ) for real-time CPU
activity tracing and debugging. It supports 4-bit and 8-bit normal trace mode and 4-bit demultiplexed
trace mode, with normal or half-rate clock.
3.9.2 Smart video accelerator (SVA)
Using leading-edge technology, this block is a low-power, high-performance video accelerator that
supports the following features:
■
MPEG-4 simple profile level 3 video encoder and decoder; real time up to VGA 30 fps encode only
or decode only)
■
H.263 profile 3 level 10 video codec; real time subQCIF or QCIF 15 fps for videoconferencing
■
H.263 profile 3 level 30 video encoder or decoder; real-time up to CIF 30 fps
■
JPEG baseline accelerated encoder or decoder, up to 4080 x 4080 pixels
■
Programmable DSP (MMDSP+) for intermediate level processing, clocked at 66 MHz
■
Picture pre-/post-processing
■
Low-power implementation
3.9.3 Smart audio accelerator (SAA)
This high-performance block is a flexible sophisticated audio accelerator based on the MMDSP+
programmable audio DSP, clocked at 133 MHz, and features:
■
24-bit data path
■
Ultra-low power implementation
The audio accelerator features:
■
MP3, AAC, AAC+ (SBR) decoding, Midi synthesis, and more
■
Speech codecs: AMR (WB, NB), and more
■
Audio sample rates of 32 kHz, 44.1 kHz and 48 kHz
■
Noise reduction and echo cancelling
■
Stereo enhancements and surround effects