Description
Motorola MVME327A
Technical Specifications
- Part Number: MVME327A
- Manufacturer: Motorola
- Product Type: VME SCSI and Floppy Disk Controller
- SCSI Controller: WD33C93 (accessed through firmware interface)
- Base Address Configuration: Through J5 jumper block (8 jumpers)
- Supported Addresses: 0xffffa600 (first board), 0xffffa700 (second board)
- Interrupt Level: IPL 2
Key Features
- Integrated SCSI and floppy disk dual controller functions
- WD33C93 SCSI controller operates through firmware interface
- Floppy disk controller function
- Base address configurable through J5 jumper block
- Supports multi-board installation (at least two boards)
- VME bus interface
Application Scenarios VME system external storage expansion, industrial control system data storage, military electronic equipment storage interface, data acquisition system storage backup, embedded system program loading
Performance Parameters
- SCSI Controller: WD33C93
- Base Address Options: 0xffffa600, 0xffffa700
- Interrupt Level: IPL 2
- Jumper Configuration: J5 jumper block (8 jumpers)
Material Composition Industrial-grade printed circuit board with WD33C93 SCSI controller chip and floppy disk controller chip meeting industrial standards, connectors using high-reliability processes.
Structural Characteristics Standard VME board size, on-board J5 jumper block located near the board center for base address configuration. VME connector located at the top of the board, front panel at the bottom.
Working Principle The MVME327A communicates with the main processor board through the VME bus. SCSI function is implemented through the WD33C93 controller, but this controller is not directly accessed by software; instead, SCSI commands are executed through the on-board firmware interface. The floppy disk controller function operates independently, managing floppy disk drive read and write operations. The J5 jumper block is used to configure the board’s VME base address, supporting installation of multiple MVME327A boards in the same system.
