Relative Addressing, Inherent addressing, 386

APPENDIX B Overview of the Instructions

Figure B.1-8shows an example.

Figure B.1-8 Example of Vector Addressing

CALLV #5

(Conversion) F F C AH

F F C B H

F E H

D C H

F E D C H

●Relative Addressing

The addressing, which is indicated by rel in the instructions list, is used for branching to the area of 128 bytes before or after the PC (program counter). In this addressing, the contents of the operand with a sign are added to the PC. The results are then stored in the PC.

Figure B.1-9shows an example.

Figure B.1-9 Example of Relative Addressing

Old PC

BNE FEH
	9ABCH + FFFE H	New PC
9 A B CH

9 A B AH

In this example, the control jumps to the address holding the operation code of BNE, causing an endless loop.

●Inherent addressing

This addressing, which has no operand in the instructions list, is used for performing an operation determined on the basis of the operation code. In this addressing, the operations differ depending on the instructions.

Figure B.1-10shows an example.

Figure B.1-10 Example of Inherent Addressing

NOP

Old PC

9 A B CH New PC

9 A B DH

386 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 MB89202, F202RA manual Relative Addressing, Inherent addressing, 386

Models: F202RA MB89202