53236-580-00 C
FAS216/216U/236/236U
1
Features
s
Host application and 16-bit peripheral application
support
s
Compliance with ANSI SCSI standard
X3.131-1994
s
Compliance with ANSI SCSI configured
automatically (SCAM) protocol levels 1 and 2
s
Compliance with ANSI X3T10/855D SCSI-3
parallel interface (SPI) standard
s
Compliance with ANSI X3T10/1071D Fast-20
standard
s
Asynchronous data transfers up to 7 Mbytes/sec
s
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
s
24-bit transfer counter
s
Initiator and target modes
s
Differential driver protection (DIFFSENS)
s
Direct memory access (DMA) burst transfer rate up
to 20 Mbytes/sec
s
Pipelined command structure
s
16-byte data FIFO between DMA and SCSI
channels
s
Parity pass-through on FIFO data
s
Part-unique ID code
s
On-chip, single-ended SCSI transceivers
(48-mA drivers)
s
Clock rates up to 40 MHz
Figure 1. FAS2x6 Block Diagram
SEQUENCERS
FIFO
SCSI
CONTROL
SCSI
DATA
CLOCK
CONVERSION
DB BUS
SYNC OFFSET/
SYNC ASSERT/
SYNC DEASSERT
SYNC PERIOD
SEQUENCE
STEP
STATUS
INTERRUPT
COMMAND
TRANSFER
COUNTER
PAD BUS
SEL/RESEL
BUS ID
SEL/RESEL
TIMEOUT
TRANSFER
COUNT
CONFIGURATION
TEST (SCAM)
NOTE:
SCAM APPLIES TO THE FAS216U AND FAS236U ONLY.
QLogic Corporation
FAS216/216U/236/236U
Fast Architecture SCSI Processor
Data Sheet
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