MC908GP32CFBR2 Integrated Circuits (ICs)

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MC908GP32CFBR2 Application Field and Working Principle

The MC908GP32CFBR2 (hereon referred to as MC908) is a family of 8-bit microcontrollers from Freescale Semiconductor’s 68HC08 product line that is well-suited for many embedded applications. Among other things, this microcontroller family is often selected for its support for both real-time interrupts and pulse-width modulation (PWM).

The MC908 comes in several flavors that vary in memory capacity, clock speed, package options, and integrated peripherals (such as serial data transceivers, analog-to-digital converters, or pulse-width-modulated outputs). However, the underlying architecture of this family is the same, featuring an 8-bit Harvard-architecture CPU, with separate memories and buses for instructions and data. Programs are typically written using a C compiler and are stored in on-chip flash memory, but some external memory may be used in some packages.

Application Field

The MC908 is applicable for many embedded applications, from consumer devices and automotive electronics to automation and security systems. Its minimal cost and power-efficiency make it one of the popular choices for embedded devices for everyday use such as cash registers, home appliances, and motor control systems. Additionally, its PWM capabilities make it a prime candidate for integration into lighting and motor control systems.

The MC908 can also be used for other applications, such as remote monitoring, data logging, and communication systems. The built-in analog-to-digital converter and serial transceiver can be used to interface this microcontroller with many different types of sensors, enabling it to be used in environment monitoring, automotive control, and robotics applications. It can also be used as an embedded controller in medical and medical supply systems, where its low power consumption is beneficial.

Working Principle

At the heart of the MC908 is its 8-bit Harvard-architecture CPU that can operate at up to 16MHz. It is designed to execute instructions in two bus cycles, and can execute instructions up to 8 bytes long. It supports arithmetic operations, logic operations, data transfer, and jump instructions.

The MC908 has separate memories for instructions and data, making it easier for the microcontroller to manipulate program data. In addition, it has integrated on-chip flash memory for storage and execution of program instructions. The amount of flash memory varies from device to device and can range from 2 kBytes to 1 MByte.

The MC908 also includes various peripherals that can be programmed to perform certain tasks. These include direct memory access controllers for data transfer, serial interface controllers for communication with external devices, analog-to-digital converters, pulse width modulator (PWM) outputs, and timer/counters.

The MC908 can be programmed in C using a program such as CodeWarrior. This software package supports debugging and code optimization functions, making it easier to develop program code for this microcontroller family.

Conclusion

The MC908 is a family of 8-bit microcontrollers with a robust architecture, a wide range of integrated peripherals, and superior power-efficiency, therefore it is well-suited for many embedded applications. Its minimal cost, diverse integrated peripherals, and efficient architecture make it an attractive option for many embedded designs.

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