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SAA7380 Datasheet(PDF) 3 Page - NXP Semiconductors

Part No. SAA7380
Description  Error correction and host interface IC for CD-ROM ELM
Download  60 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

SAA7380 Datasheet(HTML) 3 Page - NXP Semiconductors

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1996 Apr 25
3
Philips Semiconductors
Preliminary specification
Error correction and host interface IC for
CD-ROM (ELM)
SAA7380
1
FEATURES
• CD-ROM (Mode 1) and CD-I (Mode 2 - Form 1 and
Form 2) formats supported
• Real-time error detection and correction in hardware
• Suitable for 6 × speed, n = 6
• Maximum host transfer burst rate of 11.1 Mbyte/s
• Corrects two errors per symbol with erasure correction
• 36 kbit of on-chip error correction buffer RAM
• 12-byte command FIFO and 12-byte status FIFO
• Compatible with the Advanced Technology Attachment
(ATA) register set and the Advanced Technology
Attachment Program Interface (ATAPI) command set
• Operates with popular memories. (up to 128 kbyte
SRAM; 1 to 16 Mbit DRAM, different speed grades,
nibble or byte wide)
• Interface to Integrated Drive Electronics (IDE) bus
without external bus drivers
• Q-to-W subcode buffering, de-interleaving and
correction are supported
• Device can operate with audio RAMs. A RAM test allows
bad segments to be identified.
2
GENERAL DESCRIPTION
The SAA7380 decoder is a block decoder buffer manager
for high-speed CD-ROM applications that integrates
real-time error correction and detection and host interface
data transfer functions into a single chip.
The SAA7380 has an on-chip 36-kbit memory. This
memory is used as a buffer memory for error and erasure
corrections. The chip also has a buffer memory interface
thus enabling the connection of SRAM up to 128 kbytes, or
DRAM up to 16 Mbits. The on-chip memory is sufficient to
buffer 1 sector of data. The external memory can buffer
many more, depending on memory size.
The error corrector of the SAA7380 can perform 2-pass
error correction in real-time. Buffer memory for this
correction is integrated on-chip.
The SAA7380 has an host interface that is compatible with
the SANYO LC89510 or OAK OTI-012 and also
compatible with the ATA/IDE/ATAPI hard disc interface
bus. (All ATAPI registers are present in hardware).
Supply of this Compact Disc IC does not convey an implied
license under any patent right to use this IC in any
Compact Disc application.
3
QUICK REFERENCE DATA
4
ORDERING INFORMATION
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
VDDD1
digital supply voltage 1
3.0
3.3
3.6
V
VDDD2
digital supply voltage 2
4.5
5
5.5
V
IDDD
supply current
60
mA
fclk
clock frequency
15.2
33.8688 35
MHz
Tamb
operating ambient temperature
0
+70
°C
Tstg
storage temperature
−55
+125
°C
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
SAA7380GP
QFP80
plastic quad flat package; 80 leads; lead length 1.95 mm;
body 14
× 20 × 2.8 mm
SOT318-2


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