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SM5903CF Datasheet

  • SM5903CF

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

  • NPC

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SM5903CF
NIPPON PRECISION CIRCUITS INC.
compression and non compression type
anti-shock memory controller
Overview
The SM5903CF is a compression and non com-
pression type anti-shock 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 4.5 to 5.5 V supply voltage range.
Features
- 2-channel processing
- Serial data input
format
鈰?/div>
Wide capture function
(until triple speed available)
- System clock input
鈰?/div>
384fs (16.9344 MHz)
- Anti-shock memory controller
鈰?/div>
ADPCM compression method
鈰?/div>
2s complement, 16-bit/MSB first, rear-packed
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
16M DRAM (4M
脳
4 bits
脳1,refresh
cycle
2048 cycle)
4M DRAM (1M
脳
4 bits
脳1
or
脳2)
1M DRAM (256k
脳
4 bits
脳1)
lim
44pin QFP
鈰?/div>
4-level compression mode selectable
pre
Ordering Information
SM5903CF
NIPPON PRECISION CIRCUITS-1
ina
鈰?/div>
Forced mute
- Microcontroller interface
鈰?/div>
Serial command write and state read-out
鈰匘ata
residual quantity detector:
15-bit operation, 16-bit output
- Extension I/O
Microcontroller interface for external control
using 5 extension I/O pins
- +4.5 to +5.5 V operating voltage range
- Schmidt 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)
ry

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