AT91SAM7X128-CU-999

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AT91SAM7X128-CU-999 Application Field and Working Principle

The AT91SAM7X128-CU-999 Microcontroller is an embedded, microcontroller system-on-chip (SoC) from Atmel Corporation. This device is a member of the SAM7X family of ARM7TDMI-S based microcontrollers. It contains a ARM7TDMI-S core, 128KB of Flash memory, 16KB of SRAM and a wide range of peripherals, allowing it to be used in embedded systems with high performance demands.

The AT91SAM7X128-CU-999 is widely used in industrial and commercial embedded applications, such as in robotics and automation, sensor-based control systems, telecom and cellular equipment, medical instruments, automotive systems and office automation. It is also used in consumer embedded applications, such as for the developing of advanced wearable devices and the Internet of Things (IoT) applications.

Architecture and Core Features

The ARM7TDMI-S core integrated in the AT91SAM7X128-CU-999 features a 16-bit RISC architecture and a 128-bit data bus. It allows the microcontroller to execute up to 100 MIPS (million instructions per second) at a maximum frequency of 50 MHz. It also contains 16KB of SRAM, 128KB of Flash memory, a 4-input external bus interface, a four-channel digital-to-analog converter (DAC), a phase-locked loop (PLL) and a Power-down Mode. Furthermore, the processor integrates a variety of peripherals, such as a timer/counter, an watchdog timer, a UART and a communications interface.

Working Principle

The AT91SAM7X128-CU-999 microcontroller is based on the ARM7TDMI-S core which follows the RISC 16-bit architecture. This architecture works using Reduced Instruction Set Computer (RISC) concepts, in which all instructions are of fixed length and the machine cycles are reduced and standardized, thus aiming to reduce the number of transistors, improve the performance, and reduce the power consumption of the processor. The reduced number of transistors also reduces the chip production cost.

The ARM7TDMI-S core is also based on the Harvard Memory Architecture. This means that the CPU can simultaneously access and read information from both the Flash and SRAM memory, thus making the controller’s operations more efficient. Furthermore, the processor can be clocked up to 50 MHz and can execute up to 100 MIPS.

Peripherals

The AT91SAM7X128-CU-999 integrates several peripheral devices which allow it to interface with other external devices and control the application\'s needed features. Some of the peripherals included are a Timer/Counter, a Watchdog Timer, 4-input External Bus Interface, 4KB of DMA, a 4-channel DAC, a PLL, a PIO and a UART. All these peripherals enable the use of the microcontroller in a wide range of applications.

The Timer/Counter, as the name suggests, is used to count time intervals. The Timer/Counter can also be used as counter and event capture timer. The Watchdog Timer is implemented in order to constantly control the processor’s operation and reset it when an error is detected. The 4-input External Bus Interface is used to connect the microcontroller to external memories and other devices, allowing it to access and control their behavior. The PIO is also used to allow for the connection of external devices.

Conclusion

The AT91SAM7X128-CU-999 microcontroller from Atmel Corporation is a high-performance embedded microcontroller. It contains a ARM7TDMI-S Core, 128KB of Flash memory, 16KB of SRAM and a wide range of peripherals, allowing it to be used in a wide range of embedded applications. It is widely used in industrial, commercial and consumer embedded applications, such as in robotics, medical instruments, automotive systems, office automation, wearable devices and IoT applications. The processor is based on a Reduced Instruction Set Computer (RISC) architecture and is clocked up to 50 MHz and can execute up to 100 MIPS.

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