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SM5859AF データシート(PDF) 1 Page - Nippon Precision Circuits Inc |
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SM5859AF データシート(HTML) 1 Page - Nippon Precision Circuits Inc |
1 / 33 page NIPPON PRECISION CIRCUITS INC. NIPPON PRECISION CIRCUITS-1 SM5859AF compression and non compression type anti- shock memory controller Overview - 2-channel processing - Serial data input •2s complement, 16-bit/MSB first, rear-packed format - System clock input •384fs (16.9344 MHz) - Anti-shock memory controller - ADPCM compression method •4-level compression mode selectable 4-bit compression mode 2.78 s/Mbit 5-bit compression mode 2.22 s/Mbit 6-bit compression mode 1.85 s/Mbit Full-bit non compression mode 0.74 s/Mbit •4 external DRAM configurations selectable 2 ×4M DRAM (1M×4 bits) 1 ×4M DRAM (1M×4 bits) 2 ×1M DRAM (256K×4 bits) 1 ×1M DRAM (256K×4 bits) - Compression mode selectable - Microcontroller interface •Serial command write and state read-out •Data residual quantity detector: 15-bit operation, 16-bit output •Digital attenuator Full-bit setting •Soft attenuator function Noiseless attenuation-level switching (256- step switching in 23 ms max.) •Soft mute function Mute ON in 23 ms max. Direct return after soft mute release •Forced mute - Extension I/O Microcontroller interface for external control using 5 extension I/O pins - +2.7 to +5.5 V wide operating voltage range - Schmitt inputs All input pins (including I/O pins) except CLK (system clock) - Reset signal noise elimination Approximately 3.8 µs or longer (65 system clock pulses) continuous LOW-level reset - 44-pin QFP package (0.8 mm pin pitch) The SM5859 is a compression and non compres- sion type anti-shock memory controller LSI for com- pact disc players. The compression level can be set in 4 levels, and external memory can be selected from 4 options (1M, 1M ×2, 4M, 4M×2). Digital atten- uator, soft mute and related functions are also incorporated. It operates from a 2.7 to 5.5 V wide supply voltage range. Features |
同様の部品番号 - SM5859AF |
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同様の説明 - SM5859AF |
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