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SM5903BF Datasheet

  • SM5903BF

  • Nippon Precision Circuits Inc [compression and non compress...

  • NPC

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SM5903BF
NIPPON PRECISION CIRCUITS INC.
compression and non compression type
shock-proof memory controller
Overview
The SM5903BF is a compression and non com-
pression 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脳 2, 16M). It
operates from a 2.4 to 3.6 V supply voltage range.
Features
- 2-channel processing
- Serial data input
鈰?/div>
2s complement, 16-bit/MSB first, right-justified
format
鈰?/div>
Wide capture function
(up to 3
脳
speed input rate)
- System clock input
鈰?/div>
384fs (16.9344 MHz)
- Shock-proof memory controller
鈰?/div>
ADPCM compression method
鈰?/div>
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
鈰?/div>
4 external DRAM configurations selectable
1
脳
16M DRAM (4M
脳
4 bits, refresh cycle =
2048 cycle)
1
脳
or 2
脳
4M DRAM (1M
脳
4 bits)
1
脳
1M DRAM (256k
脳
4 bits)
- Microcontroller interface
鈰?/div>
Serial command write and status read-out
鈰?/div>
Data residual detector:
15-bit operation, 16-bit output
鈰?/div>
Forced mute
- Extension I/O
Microcontroller interface for external control
using 5 extension I/O pins
- +2.4 to +3.6 V operating voltage range
- Schmitt inputs
All input pins (including I/O pins) except CLK
(system clock)
- Reset signal noise elimination
Approximately 3.8
碌s
or longer (65 system
clock pulses) continuous LOW-level reset
- 44-pin QFP package (0.8 mm pin pitch)
Ordering Information
SM5903BF
44pin QFP
NIPPON PRECISION CIRCUITS-1

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