CHAPTER 11 EXTERNAL INTERRUPT CIRCUIT 2 (LEVEL)

Table 11.4-2 Functions of the Bits of the External Interrupt 2 Control Register (EIE2)

 

Bit name

 

 

 

Function

 

 

 

 

 

• These bits enable or disable the interrupt inputs to external

 

 

interrupt pins

 

to

 

 

 

 

 

 

 

 

INT20

INT27.

 

 

• When one of these bits is set to "1", the corresponding external

 

 

interrupt pin functions as an external interrupt input pin and

 

 

accepts external interrupt inputs.

 

 

• When the bit is set to "0", the corresponding pin functions as a

 

 

general-purpose port, but does not accept external interrupt

bit7

IE27 to IE20:

inputs.

Notes:

to

External interrupt

• When using a pin as an external interrupt pin, write "0" in the

bit0

input enable bits

port 0 data direction register (DDR0) in the bit corresponding to

 

 

 

 

the pin so that the pin serves inputs only.

 

 

• Regardless of the external interrupt input enable bit state, the

 

 

state of the external interrupt pin can be read directly from the

 

 

port 0 data register (PDR0). For pins

 

to

 

 

 

 

INT20

INT23,

 

 

furthermore, write "0" into A/D enable register (ADEN) in the

 

 

bits corresponding to the pins to use the pins for external

 

 

interrupt inputs.

 

 

 

 

 

 

 

 

 

 

 

251

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Fujitsu F202RA, MB89202 manual Bit name Function, 251
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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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