The Emerson/Motorola/Force Computers CPU-33B/4 SYS68K is a single-board computer built around the Motorola MC68030 microprocessor for embedded systems and industrial control applications. Operating at 25 MHz, this VMEbus-resident module delivers high-performance computing in demanding environments through a flexible synchronous bus architecture and integrated floating-point coprocessor support. The board combines a Memory Management Unit with dual 256-byte instruction and data caches, supporting a 4 Gbyte addressing range. On-board static RAM enables zero wait-state memory operations. An integrated FORCE Gate Array (FGA-002) manages I/O and control functions. Automatic power-on and watchdog timer circuits ensure reliable system initialization and fault detection. The CPU-33B/4 maintains object code compatibility with the 68020 integer unit, enabling straightforward migration of legacy software.
## Technical Specifications
• Processor: Motorola MC68030 at 25 MHz
• Floating-Point Coprocessor: 68882
• Memory Management: Dual independent MMUs for instruction and data
• On-Chip Cache: 256 bytes instruction + 256 bytes data
• Addressing Range: 4 Gbyte
• On-Board Memory: Static RAM with zero wait-state operation
• Bus Standard: VMEbus (IEEE 1014)
• Gate Array: FORCE FGA-002
• Power Control: Voltage sensor and watchdog timer
## Key Features
• High-bandwidth synchronous bus for efficient data transfer
• 68020 upward user object code compatibility
• Dual caches reduce memory access latency
• Zero wait-state static RAM minimizes processor stalls
• Integrated watchdog timer and power monitoring for system reliability
## Typical Applications
Industrial automation and control systems, real-time embedded applications, process monitoring, data acquisition and logging in field environments.
## Compatibility & Integration
Designed for VMEbus systems with standard IEEE 1014 compliance. Supports integration with external VME-compatible modules and peripherals for system expansion. Compatible with 68561 Multi-Protocol Communications Controllers and 68230 Parallel Interface and Timer modules for extended I/O functionality.
