APPENDIX B Overview of the Instructions

●CALLV #vct

This addressing is used for branching to one of the subroutine addresses registered in the table. After the return address (the contents of PC) is saved to the address indexed by SP (stack pointer), the control is branched to the address listed in the vector table via the vector addressing. This instruction is one byte, so using it for the frequently used subroutines enables the entire program size to be smaller.

Figure B.2-7shows the overview.

Figure B.2-7 Executing Example of CALLV #3

(Before execution)

PC

5678H

 

 

 

 

 

 

 

 

 

S P

1234H

(- 2)

1232H

 

 

 

 

 

 

 

 

X XH

 

 

 

1233H

X XH

 

 

 

FFC6H

 

 

 

 

F EH

 

 

 

FFC7H

D CH

 

 

 

 

 

 

 

 

 

(After execution)

PC

FEDCH

 

 

 

S P

1232H

1232H

 

5 6 H

1233H

7 9 H

 

FFC6H

F E H

FFC7H

DCH

When this instruction is executed, the contents of the PC to be saved in the stack area are not the address holding the operation code of this instruction. Instead, they comprise the address holding the next instruction. In Figure B.2-7 , therefore, the value saved in the stack (1232H and 1233H) is the same as the address holding the operation code next to CALLV #vct (return address), i.e. 5679H.

390

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Fujitsu MB89202, F202RA manual Appendix B Overview of the Instructions Callv #vct, 390
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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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