SAA7382 Datasheet, PDF (3/60 Pages) NXP Semiconductors – Error correction and host interface IC for CD-ROM ELM

Philips Semiconductors
Error correction and host interface IC for
CD-ROM (ELM)
Preliminary specification
SAA7382
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 double speed, n = 2.
• Maximum host transfer burst rate of 8.3 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 SAA7382 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 SAA7382 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 SAA7382 can perform 2-pass
error correction in real-time. Buffer memory for this
correction is integrated on-chip.
The SAA7382 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
SYMBOL
V_DDD1
V_DDD2
I_DDD
f_clk
T_amb
T_stg
PARAMETER
digital supply voltage 1
digital supply voltage 2
supply current
clock frequency
operating ambient temperature
storage temperature
MIN.
3.0
4.5
−
15.2
0
−55
TYP. MAX.
3.3
3.6
5
5.5
60
−
16.9344 18.0
−
+70
−
+125
UNIT
V
V
mA
MHz
°C
°C
4 ORDERING INFORMATION
TYPE NUMBER
SAA7382GP
NAME
QFP80
PACKAGE
DESCRIPTION
plastic quad flat package; 80 leads; lead length 1.95 mm;
body 14 × 20 × 2.8 mm
VERSION
SOT318-2
1996 Apr 25
3