MB86606A Datasheet, PDF (2/64 Pages) Fujitsu Component Limited. – FAST-20 SCSI Protocol Controller

MB86606A
s FEATURES
SCSI Protocol Controller Block:
• Operable as initiator and target
• WIDE and FAST-20 data transfers
Synchronous transfer (max. 40 Mbytes/s: Up to 256 offset values can be set.)
Asynchronous transfer (max. 10 Mbytes/s)
• 512-byte FIFO register for data phase
• Two types (send-only and receive-only) of 32-byte data buffers for message, command, and status phases
(MCS Buffers)
• On-chip totem pole type SCSI single-ended driver/receiver
• Supports external SCSI differential driver/receiver connectivity
• On-chip memory to store transfer parameters for each ID (up to 15 connected devices)
• On-chip 16-bit transfer block counter and 24-bit transfer byte counter
Maximum Transfer Byte : 1 Tbyte at fixed length data transfer
: 16 Mbyte at variable length data transfer
• Supports various control commands:
Sequential Commands : can perform phase-to-phase sequential operations (functions only when issuing
from a system side.)
Discrete Commands
: can perform any desired sequence to program in the user program memory
Data Transfer Commands : can program the transfer data length at the user program operation.
• On-chip direct control register for SCAM (SCSI Configured AutoMatically) Level-1 Protocol
• Supports Multi Selection/Reselection Responses
Selection and Reselection responses can be done to plural IDs.
• On-chip 2 Kbyte User Program Memory
Two Modes : 2 Kbyte × 1 bank and 1 Kbyte × 2 banks
(While 1 Kbyte × 2 banks are selected, host system can access another bank even if the user
program is executing.)
Access to User program : Burst transfer via I/O access port
: Direct access to 2 Kbyte user program memory (only for PCI bus I/F mode)
• User Selectable Interrupt Report
Unnecessary interrupt reports can be disabled depending on user’s applications to reduce a system ISR
overhead.
• Two automatic receive modes
Initiator : can automatically receive information for new phase to which target switched
Target : can automatically receive attention condition generated by initiator
• Automatic selection/reselection
For command issues
: automatically performs to receive MSG/CMD to the selection/reselection
request from partner device
For user program operation
• Operation Clock
: pauses the program currently executed and automatically jumps to the
specified selection /reselection routine in response to the selection/reselection
request from partner device.
System Clock: Max. 40 MHz
Internal Processor Operating Clock: Max. 20 MHz
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