CHAPTER 10 EXTERNAL INTERRUPT CIRCUIT 1 (EDGE)

●Edge detecting circuits

When the edge polarity of a signal input to one of the pins (INT10 to INT12) for external interrupt circuit 1 matches the selected edge polarity for the pin, stored in either the EIC1 or EIC2 registers in the appropriate bit position (SL00 to SL21), one of the external interrupt request flag bits (EIR0 to EIR2) corresponding to the pin is set to "1".

●External interrupt 1 control registers (EIC1, EIC2)

The EIC1 and EIC2 registers comprise bits for edge selection, for enabling or disabling interrupt requests, and for confirming an interrupt request.

●Triggers that cause external interrupt circuit 1 to generate an interrupt request

•IRQ0: When a signal with an edge or edges corresponding to the selected edge polarity is input to the INT10 pin for external interrupt circuit 1, if interrupt request outputs are enabled (EIC1:EIE0=1), external interrupt circuit 1 generates an IRQ0 interrupt request.

•IRQ1: When a signal with an edge or edges corresponding to the selected edge polarity is input to the INT11 pin for external interrupt circuit 1, if interrupt request outputs are enabled (EIC1:EIE1=1), external interrupt circuit 1 generates an IRQ1 interrupt request.

•IRQ2: When a signal with an edge or edges corresponding to the selected edge polarity is input to the INT12 pin for external interrupt circuit 1, if interrupt request outputs are enabled (EIC2:EIE2=1), external interrupt circuit 1 generates an IRQ2 interrupt request.

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Fujitsu MB89202, F202RA manual Edge detecting circuits, External interrupt 1 control registers EIC1, EIC2, 228
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F202RA, MB89202 specifications

The Fujitsu MB89202 and F202RA microcontrollers are part of the 16-bit microcontroller family, renowned for their robust performance and versatility in a variety of embedded system applications. These devices are tailored for high-efficiency operation across diverse industries, including automotive, consumer electronics, and industrial automation.

One of the main features of the MB89202 is its powerful CPU core, which operates at a clock speed of up to 20 MHz. This enables the microcontroller to perform complex calculations and consumer-grade applications seamlessly. The architecture is designed to handle multiple tasks effectively, making it suitable for real-time operations.

Memory capacity is a vital characteristic of the MB89202, featuring on-chip RAM and ROM configurations. The microcontroller can accommodate different memory variants, providing developers with flexibility in memory allocation based on their application requirements. This adaptability facilitates applications ranging from simple control systems to complex data processing tasks.

The F202RA variant extends the capabilities of the MB89202 by integrating advanced peripheral functions. It includes built-in timers, A/D converters, and serial communication interfaces, which are essential for interfacing with other hardware components or sensors. The availability of these peripherals reduces the need for additional external circuits, thus contributing to a more compact and cost-effective design.

In terms of power management, the MB89202 series employs advanced power-saving technologies. The microcontroller offers various low-power modes, enabling devices to conserve energy during idle times, making it highly suitable for battery-operated applications. This characteristic not only enhances the efficiency of devices but also extends their operational lifespan.

Moreover, the Fujitsu MB89202 series incorporates robust protection features, including watchdog timers and failure detection mechanisms. These safety features ensure reliable operation in critical systems, making them a preferred choice in applications where failure is not an option.

The MB89202 and F202RA microcontrollers also support a range of development tools and environments, including integrated development environments (IDEs) and software libraries, which facilitate rapid application development. With these tools, developers can efficiently prototype, debug, and optimize their applications.

In summary, the Fujitsu MB89202 and F202RA microcontrollers stand out with their efficient performance, extensive memory options, integrated peripherals, and power-saving capabilities, making them ideal for a wide array of embedded applications. Their reliability and robustness further enhance their attractiveness for designers seeking advanced microcontroller solutions.
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