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SM5901AF Folha de dados(PDF) 1 Page - Nippon Precision Circuits Inc |
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SM5901AF Folha de dados(HTML) 1 Page - Nippon Precision Circuits Inc |
1 / 31 page NIPPON PRECISION CIRCUITS INC. SM5901AF compression and non compression type anti-shock memory controller with built-in 1M DRAM 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 0.70 s/Mbit •External memory can be connected 2 ×1M DRAM (256K×4 bits) Internal and external 1M DRAMs 1 ×1M DRAM (256K×4 bits) Only internal 1M DRAM - 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 +3.3 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 SM5901 is a compression and non compres- sion type anti-shock memory controller with built-in 1M DRAM LSI for compact disc players. The com- pression level can be set in 4 levels, and external 1M DRAM can be connected to expand the memo- ry to 2M bits. Digital attenuator, soft mute and relat- ed functions are also incorporated. It operates from a 2.7 to 3.3 V wide supply voltage range. Features |
Nº de peça semelhante - SM5901AF |
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Descrição semelhante - SM5901AF |
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