SM5903CF datasheet(1/31 Pages) NPC

No. de pieza	SM5903CF

Descripción Electrónicos	compression and non compression type anti-shock memory controller

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Fabricante Electrónico	NPC [Nippon Precision Circuits Inc]

Página de inicio	http://www.npc.co.jp/en

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NIPPON PRECISION CIRCUITS INC.

NIPPON PRECISION CIRCUITS-1

SM5903CF

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

⋅ Wide capture function

(until triple speed available)

- 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

16M DRAM (4M

× 4 bits ×1,refresh cycle

2048 cycle)

4M DRAM (1M

× 4 bits ×1 or ×2)

1M DRAM (256k

× 4 bits ×1)

- Microcontroller interface

⋅ Serial command write and state read-out

⋅Data residual quantity detector:

15-bit operation, 16-bit output

⋅ Forced mute

- 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

µs or longer (65 system

clock pulses) continuous LOW-level reset

- 44-pin QFP package (0.8 mm pin pitch)

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

× 2, 16M). It

operates from a 4.5 to 5.5 V supply voltage range.

Features

Ordering Information

SM5903CF

44pin QFP

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SM5903CF Datasheet(PDF) 1 Page - Nippon Precision Circuits Inc

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