FAS236U

w w at .D w Features s s s s s s s U 4 t e e FAS216/216U/236/236U h aS Fast Architecture SCSI Processor Data Sheet s s s s s s s s s s m o .c QLogic Corporation Host application and 16-bit peripheral application support Compliance with ANSI SCSI standard X3.131-1994 Compliance with ANSI SCSI configured automatically (SCAM) protocol levels 1 and 2 Compliance with ANSI X3T10/855D SCSI-3 parallel interface (SPI) standard Compliance with ANSI X3T10/1071D Fast-20 standard Asynchronous data transfers up to 7 Mbytes/sec Synchronous data transfers up to 5 Mbytes/sec (normal SCSI), 10 Mbytes/sec (fast SCSI), and 20 Mbytes/sec (Ultra SCSI) Ì Programmable synchronous transfer period Ì Programmable synchronous transfer offsets up to 15 bytes DB BUS w PAD BUS NOTE: w REGISTER BUS (IN) .D w COMMAND TRANSFER COUNTER TRANSFER COUNT SEL/RESEL BUS ID SEL/RESEL TIMEOUT INTERRUPT STATUS SEQUENCERS SEQUENCE STEP SCSI CONTROL REGISTER BUS (OUT) t a S a e h 24-bit transfer counter Initiator and target modes Differential driver protection (DIFFSENS) Direct memory access (DMA) burst transfer rate up to 20 Mbytes/sec Pipelined command structure 16-byte data FIFO between DMA and SCSI channels Parity pass-through on FIFO data Part-unique ID code On-chip, single-ended SCSI transceivers (48-mA drivers) Clock rates up to 40 MHz t e U 4 .c m o SCSI DATA FIFO SYNC PERIOD SYNC OFFSET/ SYNC ASSERT/ SYNC DEASSERT CLOCK CONVERSION CONFIGURATION TEST (SCAM) SCAM APPLIES TO THE FAS216U ...