SAA7380GP datasheet(3/60 Pages) PHILIPS

3 / 60 page

1996 Apr 25

Philips Semiconductors

Preliminary speciﬁcation

Error correction and host interface IC for

CD-ROM (ELM)

SAA7380

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.

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.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

VDDD1

digital supply voltage 1

3.0

3.3

3.6

VDDD2

digital supply voltage 2

4.5

5.5

IDDD

supply current

−

fclk

clock frequency

15.2

33.8688 35

MHz

Tamb

operating ambient temperature

−

+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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