MC68302AG25C

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The MC68302AG25C is an embedded microprocessor from Freescale Semiconductor. It is a 32-bit processor that uses an on-chip memory management unit (MMU) to support 32-bit virtual addressing and provide an embedded processor solution with maximum system performance and flexibility. Designed for a wide range of real-time applications, this system on chip (SoC) combines superior 32-bit processing, memory and peripheral integration and advanced power management features.

The MC68302AG25C is ideal for designing embedded systems with real time requirements such as automotive, communication, consumer electronics, networking, and industrial control applications. It has a low cycle count full-duplex sequential access memory controller providing access to up to 2 MB of external memory. It is also suitable for creating embedded systems requiring communications, such as routers, firewalls and switches. The processor also includes an on-chip Cache Controller to reduce the memory latency, integrated clock management unit and DMA controller for system performance.

The MC68302AG25C includes a 16KB instruction cache, 8KB data cache, MMU and a three-stage pipeline that enable it to execute instructions at full speed. The MMU supports four pages of virtual address space and provides segmented protection and control as well as separate user and supervisor modes. The processor also includes a single cycle multiply/divide unit and a debugging unit to monitor program execution and access on-chip and off-chip memory.

The MC68302AG25C supports different levels of instruction set architectures (ISAs) including the MOTOROLA 68000 and 68K family. It also supports 32-bit linear addressing, providing a low-cost way to port designs over to the new processor. Furthermore, it offers an integrated Direct Memory Access (DMA) controller, which provides considerable flexibility in data and address communication between system modules.

In terms of power management, the MC68302AG25C can operate in two power modes: Normal Mode and Sleep Mode. In Normal Mode, the processor remains on and requires a voltage supply of 5V. When in Sleep Mode, the processor powers down and requires only 3.3V. The processor can wake up from Sleep Mode quickly and perform operations such as timeout control and data collection. In addition, the MC68302AG25C supports multiple clock modes, allowing designers to adjust clock frequency for power consumption optimization.

The MC68302AG25C comes with a range of on-chip peripherals for communication, system control and timing. These include a real time clock (RTC), timer/counter array, pulse width modulator (PWM) and pulse stretcher, serial communications interfaces (SCIs), general purpose I/O (GPIO), and a variety of interrupt sources. It also supports multiple types of external data buses including the MC68K, Video, Audio and Serial Peripheral Interface (SPI) buses. Furthermore, the processor can handle up to 60 MHz clock speed and includes an on-chip physical layer interface for controlling external peripherals.

The MC68302AG25C is a highly integrated system on chip solution for embedded applications. It is designed for maximum system performance and flexibility by combining an on-chip MMU with 32-bit linear addressing, advanced power management features, and multiple clock modes. This processor offers a low-cost way to port designs over to the new processor, while its range of on-chip peripherals and integrated direct memory access controller make it suitable for a variety of embedded real-time applications.

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