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3.8. Subsystem of STn8810
3.8.1. 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 Medium+) 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.
3.8.2. 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
3.8.3. 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
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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LGE Internal Use Only
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