MC908GR48ACFUE

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The MC908GR48ACFUE is an 8-bit microcontroller targeted with code compatibility to the popular Freescale HCS08 family of cores. It is specifically designed to address embedded system demands for general control, event control and timing control. The device integrates a 32 Kbyte on-chip flash memory, two-channel 16-bit timer and other peripheral functions into a 40-pin package.

MA908GR48ACFUE is a low cost, low power consumption and low pin count microcontroller. It is usually used in applications such as home appliances, industrial control, and office automation. It provides an ideal solution for applications that need to manage and optimize power consumption for reduced battery size and longer product life.

The MC908GR48ACFUE comes with an architecture that contains three key sections: Central Processor Unit (CPU), Memory, and Peripheral. The central processor unit consists of a 32-bit RISC core. Its instruction set allows complex algorithms to be efficiently implemented. The memory section consists of 21KB of SRAM along with 32KB of on-board flash memory. The 8-bit MCU with Flash/EEPROM Memory has an array of peripheral support.

In addition to timers, address lines, input/outputs, transceiver and other integrated functions, there are two serial communication interfaces on the MC908GR48ACFUE. The KEYPAD module supports key debouncing and up to 10 programmable hardware keys. Analog-to-digital conversion and pulse width modulation are also integrated.

The working principle of MC908GR48ACFUE starts with the program counter, which is used to fetch instructions from the program memory. The instructions are then decoded and executed by the CPU. The data memory and processor communicate as words are read and written. Then the correct address is provided to the data memory and specified data is written at that address.

The CPU also communicates with the integrated peripherals and I/O - this is done through a set of registers. For example, the timer module can be read or written to a specific address, allowing the processor to program or check a timer\'s condition. Similarly for other peripherals, such as GPIOs, the address lines can be used to read/write data.

The MC908GR48ACFUE also has a power down mode that allows the system to lower its power consumption. When the power supply is turned off, the system will enter the halt mode and all clocks will stop. When power is restored, the system will resume at the point it was before entering the halt mode. The system will also support multiple low power modes, which allows it to efficiently manage power, while all parts of the system remain operational and available.

In conclusion, the MC908GR48ACFUE is an 8-bit microcontroller designed for embedded applications. It features a powerful and efficient RISC core, 21KB SRAM and 32KB on-board flash memory. The microcontroller supports two serial interfaces, as well as analog-to-digital conversion and pulse width modulation. Its power saving modes also allow the system to reduce power consumption and remain operational in low power modes.

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