MB86604LPFV datasheet(10/56 Pages) FUJITSU

10 / 56 page

MB86604L

The main registers are listed.

• Command register

Command is specified by an 8-bit code.

Specifies the program head address assigned to the user program memory for user program applications.

• Chip status register

Shows the chip's operating state, nexus counterpart ID, and data register state.

• SCSI bus status register

Shows the SCSI control signal state.

• Interrupt status register

Shows 8-bit code.

• Command step register

Shows 8-bit code indicating the command execution state.

Error analysis can be performed by referring to the information in this register and the interrupt status register.

• Group 6/7 command length setting register

Sets the group 6/7 command length which is undefined by the SCSI standard.

By setting the command length in this register, the SPC can determine the command length.

Receive-MCS Buffer

A receive only, 32-byte data buffer which stores information received via SCSI (message, command, status)

M: Message, C: Command, S: Status

Send-MCS Buffer

A send only, 32-byte data buffer which stores information sent via SCSI (message, command, status)

Command User Program Memory

Program memory used for establishing programmable commands (256 bytes).

Data Register

FIFO-type data register which stores data in SCSI data phase (32 bytes).

MB86604LPFV Datasheet(PDF) 10 Page - fujitsu semiconductor