Description

The Electronic Component Model AM53CF94JC is an enhanced SCSI-2 controller designed to support fast SCSI-2 transfer rates. It is downward compatible with the Am53C94/96 and combines its functionality with features such as fast SCSI, programmable active negation, a 24-bit transfer counter, and a part-unique ID code containing manufacturer and serial number information.

Specifications and features

• Pin/function compatible with Emulex FAS216/236
• AMD's Patented programmable GLITCH EATERTM Circuitry on REQ and ACK inputs
• 10 Mbytes/s synchronous Fast SCSI transfer rate
• 20 Mbytes/s DMA transfer rate
• 16-Bit DMA interface plus 2 bits of parity
• Flexible three bus architecture
• Single-ended SCSI bus supported by Am53CF94
• Differential SCSI bus supported by Am53CF96
• Selection of multiplexed or non-multiplexed address and data bus
• High current drivers (48 mA) for direct connection to the single-ended SCSI bus
• Supports Disconnect and Reselect commands
• Supports burst mode DMA operation with a threshold of eight
• Supports 3-byte tagged-queueing as per the SCSI-2 specification
• Supports group 2 and 5 command recognition as per the SCSI-2 specification
• Advanced CMOS process for lower power consumption
• AMD's exclusive programmable power-down feature
• 24-Bit extended transfer counter allows for data block transfer of up to 16 Mbytes
• Independently programmable 3-byte message and group 2 identification
• Additional check for ID message during bus-initiated Select with ATN
• Reselection has QTAG features of ATN3
• Access FIFO Command
• Delayed enable signal for differential drivers avoid contention on SCSI differential lines
• Programmable Active Negation on REQ, ACK and Data lines
• Register programmable control of assertion/deassertion delay for REQ and ACK lines
• Part-unique ID code
• Am53CF94 available in 84-pin PLCC package
• Am53CF96 available in 100-pin PQFP package
• Am53CF94 available in 3.3 V version
• Supports clock operating frequencies from 10 MHz–40 MHz
• Supports Scatter-Gather or Back-to-Back synchronous data transfers

Application Scenarios

The Electronic Component Model AM53CF94JC can be used in various applications that require fast SCSI-2 transfer rates. Some examples include:

• Data storage systems
• Network attached storage
• High-speed data transfer
• Server systems
• RAID systems
• Industrial automation

Comparison

• Supports fast SCSI-2 transfer rates
• Downward compatible with Am53C94/96
• Programmable active negation
• 24-bit transfer counter
• Part-unique ID code
• Flexible three bus architecture
• Supports both single-ended and differential SCSI bus
• Low power consumption
• Programmable power-down feature
• Supports burst mode DMA operation
• High current drivers for direct connection to the SCSI bus
• Supports advanced features like tagged-queueing and command recognition
• Multiple package options available

• Requires external components for complete system implementation
• Not compatible with all types of electronic systems