MPC860DECVR66D4

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The MPC860DECVR66D4, an embedded microprocessor from the MPC860 family, is a core assembly of General Electric\'s VersaModular Eurocard (VME) system, handling operations such as manipulating registers and control buses, interrupt and DMA services. It is an efficient, low-power and highly integrated device, suitable for embedded systems, industrial automation and process control applications.

As a part of the PowerPC family of RISC microprocessors, the MPC860DECVR66D4 is equipped with several remarkable features, including floating-point support and data compression. It is designed with a 32-bit architecture and offers a 32-bit address space. It has an integrated memory management unit (MMU), providing virtual memory support and trap services, which allows the processor to access any system memory address.

Besides the general capabilities of a modern embedded microprocessor, the MPC860DECVR66D4 also offers advanced features such as a Variable Length Decode (VLD) instruction buffer that reduces the number of branch instructions executed and predicts branch targets. It also features configuration registers that allow the user to configure specific chip functions as needed.

The MPC860DECVR66D4 supports two instruction sets - the PowerPC and the IEEE 488.2 standard. The PowerPC instruction set is similar to other RISC-based microprocessors, providing basic arithmetic and Boolean operations, as well as certain privileged instructions. With its IEEE 488.2 support, the MPC860DECVR66D4 is able to operate with the IEEE-488 data transfer protocol and to access IEEE-488 compatible peripherals.

In terms of memory support, the MPC860DECVR66D4 has 64KB of external instruction cache and 32KB of external data cache, as well as an internal instruction and data cache of 16KB each. The processor also supports up to 16MB of external RAM and up to 128MB of external ROM, which can be connected over 32-bit address and data busses. For its internal logic, the MPC860DECVR66D4 features two on-chip buses - a dedicated DMA/interrupt controller bus and an asynchronous request bus.

The MPC860DECVR66D4 employs the VMEbus standard as its main data communications protocol, allowing the processor to access various external bus masters and slave devices. The processor is also equipped with an internal general purpose timer (GPT) and a system-level management unit (SLMU), providing power management and system monitoring. In addition, the MPC860DECVR66D4 can be further expanded with peripheral interface components like real-time clocks, EEPROM, A2D and D2A converters, and others.

The MPC860DECVR66D4 is a versatile and efficient embedded microprocessor, capable of handling operations for industrial automation and process control. Its powerful features and advanced technologies offer users the flexibility and reliability needed for a wide range of applications, including embedded systems and industrial instrumentation.

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