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SM5902 Datenblatt(PDF) 1 Page - Nippon Precision Circuits Inc |
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SM5902 Datenblatt(HTML) 1 Page - Nippon Precision Circuits Inc |
1 / 40 page NIPPON PRECISION CIRCUITS INC. NIPPON PRECISION CIRCUITS-1 SM5902AF compression and non compression type shock-proof memory controller Overview - 2-channel processing - Serial data input ⋅ 2s complement, 16-bit/MSB first, right-justified format ⋅ Wide capture function (up to 3 × speed input rate) - System clock input ⋅ 384fs (16.9344 MHz) - Shock-proof 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 1 × 16M DRAM (4M × 4 bits, refresh cycle = 2048 cycle) 1 × or 2 × 4M DRAM (1M × 4 bits) 1 × 1M DRAM (256k × 4 bits) ⋅ DRAM at 5V operation is usable for Low-volt- age operation - Compression mode selectable - Microcontroller interface ⋅ Serial command write and status read-out ⋅ Data residual detector: 15-bit operation, 16-bit output ⋅ Digital attenuator 8-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 - +2.4 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 - Digital audio interface (DIT) - 44-pin QFP package (0.8 mm pin pitch) The SM5902 is a compression and non compres- sion type shock-proof memory controller LSI for compact disc players. The compression level can be set in 4 levels, and external memory can be selected from 4 options (1M, 4M, 4M × 2, 16M). Digital attenuator, soft mute and related functions are also incorporated. It operates from a 2.4 to 5.5 V wide supply voltage range. Features Ordering Information SM5902AF 44pin QFP |
Ähnliche Teilenummer - SM5902 |
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Ähnliche Beschreibung - SM5902 |
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