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SAA7390

Features: 1.1 General· 8×speed CD-ROM, 4×speed Compact Disc-Recordable (CD-R) controller· 16.9 Mbytes/s burst rate to host controller· High performance CD-ROM and CD-R interface logic· 128 pin QFP package.1.2 Interface logic (CD-ROM operation)· Full 8´ speed hardware operation· Block decoder...

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SeekIC No. : 004484076 Detail

SAA7390: Features: 1.1 General· 8×speed CD-ROM, 4×speed Compact Disc-Recordable (CD-R) controller· 16.9 Mbytes/s burst rate to host controller· High performance CD-ROM and CD-R interface logic· 128 pin QFP p...

SAA7390 Data Sheet

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Part Number:
SAA7390
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/26

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Product Details

Description



Features:

1.1 General
· 8×speed CD-ROM, 4×speed Compact Disc-Recordable (CD-R) controller
· 16.9 Mbytes/s burst rate to host controller
· High performance CD-ROM and CD-R interface logic
· 128 pin QFP package.
1.2 Interface logic (CD-ROM operation)
· Full 8´ speed hardware operation
· Block decoder
· Sector sequencer
· CRC checking of Mode 1 and Mode 2, Form 1 sectors
· 212 ms watch-dog timer
· Sub-code interface with synchronization
· C-flag interface for absolute time stamp.
1.3 Hardware third-level error correction
· Third-level correction provides superior performance in unfavourable conditions
· Full hardware error correction to reduce microcontroller overhead
· Corrections are automatically written to the DRAM frame buffer.
1.4 Interface logic (CD-R operation)
· Block encoder (using a modified CDB2).
1.5 DRAM buffer controller (256 kbytes× 8,1 Mbyte×8, 4 Mbytes× 8)
· DRAM buffer manager
· Ten level arbitration logic
· Utilizes low cost 70 ns DRAMs
· Page mode DRAM access for high-speed error correction and host interface data transfers
· Data organization by 3 kbytes frames.
1.6 Additional product support
· Input clock doubler
· All control registers mapped into 80C32 special function memory space
· Red book audio pass through to host interface
· Sub-code and Q-channel support
· Dedicated Serial Peripheral Interface (SPI)
· Third level error correction and encoding
· 80C32 microcontroller interface
· 53CF90 or 53CF92A/B fast SCSI processor interface (may also use ATAPI processor).


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER MIN. MAX. UNIT
VDD digital supply voltage -0.5 +7 V
Vi(max) maximum input voltage on any pin VSS - 0.5 VDD + 0.5 V
VO output voltage on any output -0.5 +7 V
Tstg storage temperature -55 +150 °C



Description

The SAA7390 is a high integration ASIC that incorporates all of the logic necessary to connect a CD-60 based decoder to a SCSI or ATAPI host. SAA7390 also supports a data path from the host to the CDCEP (compact disc encoder) for CD-R applications. An 80C32 microcontroller and a 53CF94/92A (or an ATAPI interface device) are required to provide the full block encode/decode functions. The following functions are supported:
· Input clock doubler
· Block encoder (using a modified CDB2)
· Block decoder
· CRC checking of Mode 1 and Mode 2, Form 1 sectors
· Red book audio pass through to SCSI or ATAPI
· Sub-code and Q-channel support
· Dedicated S2B interface UART
· Dedicated SPI interface UART
· Up to 4 Mbytes DRAM buffer manager
· Third-level error correction and encoding
· Automatic storage of audio and data
· 80C32 microcontroller interface
· 53CF90 or 53CF92A/B fast SCSI or Wapiti ATAPI processor interface.

The SAA7390 uses a 33.8688 MHz clock and is capable of accepting data at eight times (n = 8 or 1.4 Mbytes/s) the normal CD-ROM data rate. The minimum host burst rate capability of the SAA7390 is 5 Mbytes/s.

Third level error correction hardware of SAA7390 is included to improve the correction efficiency of the system. The buffer manager hardware utilizes a ten-level arbitration unit and can stop the clock to the static microcontroller to emulate a wait condition when necessary. The host interface is capable of burst rates to 16.9 Mbytes/s.




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