SN75C091A - Texas Instruments

SN75C091A SCSI Bus Controller

The SN75C091A provides the capability to interface a microprocessor subsystem to the ANSI Small Computer Systems Interface (SCSI). This single-ended SCSI implementation acts as one of up to eight nodes communicating over a maximum six-meter bus as detailed in the SCSI specification (ANSI X3.131-1986). Its microprocessor and DMA interfaces allow the SN75C091A.

Features

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• SCSI Bus Interface Complies with ANSI X3.131-1986 SCSI standard Performs INITIATOR and TARGET functions Supports arbitration, selection, and reselection Performs asynchronous data transfers of up to 5 Megabytes/second (MBps) Performs synchronous data transfers of up to 5 Megabytes/second (MBps) with programmable offset up to 15 Has on-chip 48-mA transceivers Provides optional parity generation, checking, and pass-through Reduces overhead associated with initiator multi-threading by automatically handling savedata-pointer messages, disconnects, and reconnects Perform.