Interrupt request generating circuit | Fujitsu F202RA, MB89202

CHAPTER 11 EXTERNAL INTERRUPT CIRCUIT 2 (LEVEL)

11.2Configuration of External Interrupt Circuit 2

The external interrupt circuit 2 comprises the following three blocks:

•Interrupt request generating circuit

•External interrupt 2 control register (EIE2)

•External interrupt 2 flag register (EIF2)

■Block Diagram of External Interrupt Circuit 2

Figure 11.2-1 Block Diagram of External Interrupt Circuit 2

External interrupt 2 control register (EIE2)

IE27 IE26 IE25 IE24 IE23 IE22 IE21 IE20

External interrupt 2 flag register (EIF2)

IF20

Interrupt request generating circuit

P00/INT20/AN4 Pin

P01/INT21/AN5 Pin

P02/INT22/AN6 Pin

P03/INT23/AN7 Pin

P04/INT24	Pin	External interrupt
P05/INT25	Pin	request
P05/INT25	Pin	IRQA
P06/INT26	Pin
P07/ INT27	Pin

●Interrupt request generating circuit

The interrupt request generating circuit generates an interrupt request signal in accordance with the signal input to one of the external interrupt pins (INT20 to INT27) and the contents of an external interrupt input enable bit.

●External interrupt 2 control register (EIE2)

The external interrupt input enable bits (IE20 to IE27) enable or disable "L" level input from the external interrupt pins, with each bit corresponding to a pin.

●External interrupt 2 flag register (EIF2)

The external interrupt request flag bit (IF20) is used to hold or clear an interrupt request signal.

●Trigger causing external interrupt circuit 2 to generate an interrupt

•IRQA:When an "L" level signal is input to any of the external interrupt pins INT20 to INT27 and the external interrupt input enable bit corresponding to the pin is "1", external interrupt circuit 2 generates an interrupt request.

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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.

Fujitsu F202RA Interrupt request generating circuit, External interrupt 2 control register EIE2

Models: F202RA MB89202