SAB82C257

Features: • 16-bit DMA controller for 16-bit family processors SAB 80286 SAB 80186 188 SAB 8086/88• 4 independent high-speed DMA channels• 16 Mbyte addressing range• 16 Mbyte maximum block length• Memory based communication with CPU• On-the fly compare, transl...

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SeekIC No. : 004484158 Detail

SAB82C257: Features: • 16-bit DMA controller for 16-bit family processors SAB 80286 SAB 80186 188 SAB 8086/88• 4 independent high-speed DMA channels• 16 Mbyte addressing range• 16 Mbyte...

floor Price/Ceiling Price

Part Number:
SAB82C257
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: 2024/7/12

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Product Details

Description



Features:

• 16-bit DMA controller for 16-bit family processors
SAB 80286
SAB 80186 188
SAB 8086/88
• 4 independent high-speed DMA channels
• 16 Mbyte addressing range
• 16 Mbyte maximum block length
• Memory based communication with CPU
• "On-the fly" compare, translate and verify operations
• Transfer rates up to 10 Mbyte/s
• 32-bit-fly-by transfers with up to 20 Mbyte/s (10-MHz system)
• Single cycle and two cycle transfer
• Automatic chaining of command blocks
• Variable chaining of data blocks
• Multiplexer mode operation with up to 32 subchannels
• Local and remote (standalone) mode
• Support of 16-bit and 8-bit data buses
• Multiple programmable control of channel priorities
• Direct and fast CPU/channel communication



Description

The SAB 82258A is an advanced general-purpose fourchannel DMA controller tailored for efficient high speed data transfer between peripheral devices and memories. SAB82C257 is either coupled tightly with a companion CPU (local mode) or
working in stand alone applications using the remote mode. The SAB 82258A is unique among DMA controllers SAB82C257 providing complete direct interfacing to the SAB 80286 as well as to SAB 80186/188/86/88 bus.

SAB82C257 four superfast DMA channels transfer rate up to 10 Mbytes per second are possible. If the maximum transfer rate
reaches as much as 20 Mbyte/second. In addition one of the DMA channels may be configured as multiplexer channel so that a large number of low speed peripherals can share the use of the same channel. The interrupt structure of SAB82C257 belongs to the fastest and most versatile ones available. Multiple SAB 82258A DMAs can be integrated very easily by using a simple local bus arbiter logic.

The SAB 82258A is the only DMA controller that provides source or destination-oriented data chaining (two chaining modes) as well as conditional command chaining (jumps within channel program based on several conditions).




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