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SAA7380 Datasheet(PDF) 3 Page - NXP Semiconductors |
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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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