MB86604L Datasheet, PDF (49/56 Pages) Fujitsu Component Limited. – SCSI-II Protocol Controller (with single-ended driver/receiver)

MB86604L
4. Programmable Commands
The user program is stored in the user program memory and begins operation when the user program head address
is written in the command register.
Programmable commands are composed of discrete and special commands and have a command length of one
(1) or two (2) bytes.
• Command field assign
Command type
Command code (1st byte)
Operand (2nd byte)
Message, command, or status phases
send command
Memory address of the data to be sent.
Discrete commands
Message, command, or status phases Memory address of received data being
receive command
stored.
Data phase receive/send command or
do not perform transfer command
—
AND command
Data for AND operation or memory
address of data for AND operation.
TEST AND command
Data for AND operation or memory
address of data for AND operation.
Special commands
COMPARE command
Data for COMPARE operation or
memory address of data for COMPARE
operation.
Conditional branch command
Jump head address
MOVE command
Memory address to be moved.
STOP command
User status code
NOP command
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