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Simple Micro APB Bus Controller
CoreABC is a simple, low gate count controller for Advanced Microcontroller Bus Architecture (AMBA®) advanced peripheral bus (APB) based designs. In particular, it is targeted to control CoreAI and CorePWM in mixed-signal applications, but it can be used to control any APB or APB3 bus IP core. CoreABC supports a comprehensive assembler-based configurable instruction set architecture and extensive and flexible configuration of size and feature options allowing it to be tuned to meet the resource constraints and processing power requirements of a wide variety of applications. The instructions executed are either held in a small internal ROM constructed from logic tiles ("hard" configuration), stored in RAM blocks internal to CoreABC ("soft" configuration), or in Fusion or SmartFusion devices, in on-chip nonvolatile memory ("NVM" configuration). The core is easy to configure and program offering efficient local control for use in real-time applications in Microsemi FPGAs.
The core consists of six main blocks:
* Instruction block
* Sequencer
* ALU and flags
* Storage
* ACM
* APB controller
* AMBA3 APB master interface controller
The core consists of six main blocks:
* Instruction block
* Sequencer
* ALU and flags
* Storage
* ACM
* APB controller
* AMBA3 APB master interface controller
Features
- Programmable APB bus controller
- Hard, soft (RAM), or NVM instruction storage on Fusion devices; hard instruction storage on SmartFusion2, IGLOO2, RTG4, and PolarFire devices; hard or soft instruction storage on other device families
- Automatic detection of CoreAI in CoreABC’s APB address space and auto-creation of analog configuration MUX (ACM) data, based on CoreAI configuration
- Extensive configurability, allowing very low cost and resource efficient implementations
- APB interface can be configured for 8, 16, or 32-bit data
- In NVM instruction storage mode, APB data type read and write access to the instruction store memory (through an APB slave interface) is supported
- Built in general purpose input/output (GPIO) signals
- Interrupt driven operation using interrupt request and interrupt active signals
Block Diagram of the Simple Micro APB Bus Controller IP Core
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