SM5903BF(1999) Ver la hoja de datos (PDF) - Nippon Precision Circuits

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SM5903BF
(Rev.:1999)

compression and non compression type shock-proof memory controller

Nippon Precision Circuits  

NIPPON PRECISION CIRCUITS INC.

SM5903BF

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× 2, 16M). It

operates from a 2.4 to 3.6 V supply voltage range.

Features

- 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)

- Microcontroller interface

⋅ Serial command write and status read-out

⋅ Data residual detector:

15-bit operation, 16-bit output

⋅ 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 µs 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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