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參數(shù)資料
| 型號： | SM5904BF |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | compression and non compression type shock-proof memory controller |
| 中文描述： | 壓縮和非壓縮式防震內(nèi)存控制器 |
| 文件頁數(shù)： | 1/35頁 |
| 文件大小： | 266K |
| 代理商： | SM5904BF |
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NIPPON PRECISION CIRCUITS INC.
NIPPON PRECISION CIRCUITS-1
SM5904BF
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
External DRAM configurations usable
2
×
4M DRAM (1M
×
4 bits)
Internal and External 4M DRAM
1
×
4M DRAM (1M
×
4 bits)
Only Internal 4M DRAM
- 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 4 extension I/O pins
- +2.4 to + 3.3 V operating voltage range
- Schmitt inputs
All input pins (including I/O pins) except CLK
(system clock)
- Reset signal noise elimination
Approximately 3.8
μ
s or longer (65 system
clock pulses) continuous LOW-level reset
- Digital audio interface (DIT)
- 44-pin QFP package (0.8 mm pin pitch)
The SM5904BF 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 4M DRAM can be
connected to expand the memory to 4M bits. Digital
attenuator, soft mute and related functions are also
incorporated. It operates from a 2.4 to 3.3 V supply
voltage range.
Features
Ordering Information
SM5904BF
44pin QFP
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SM5904CF | compression and non compression type |
| SM5905AF | compression and non compression type shock-proof memory controller |
| SM5906AF | Shock-proof Memory Controller for Video CD Players |
| SM5907 | compression and non compression type shock-proof memory controller |
| SM5907AF | compression and non compression type shock-proof memory controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM5904CF | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:compression and non compression type |
| SM5905AF | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:compression and non compression type shock-proof memory controller |
| SM5906AF | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:Shock-proof Memory Controller for Video CD Players |
| SM5907 | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:compression and non compression type shock-proof memory controller |
| SM5907AF | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:compression and non compression type shock-proof memory controller |
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