CHAPTER 16 WILD REGISTER FUNCTION

16.2Configuration of the Wild Register Function

The wild register function consists of the following two blocks:

Memory area part

Data setting register (WRDR)

Higher address set register (WRARH)

Lower address set register (WRARL) Control circuit part

Block Diagram of the Wild Register Function

Figure 16.2-1 Block Diagram of Wild Register Function

 

 

Incorporated ROM/RAM

 

 

 

Wild register function

 

 

 

 

Memory area part

Control circuit part

 

 

bus

Data setting register

Access control circuit

 

 

(WRDR)

 

 

 

Internal data

 

Address comparison

Decoder

Address

 

EN register (WREN)

Higher address set

 

register (WRARH)

Matching signal

 

 

Address comparison

 

 

 

Lower address set

 

 

 

 

register (WRARL)

 

 

 

 

 

Access control

 

 

Memory area part

This part consists of the data setting register, higher address set register ("H" address), and lower address set register ("L" address). Set the address and data to be replaced by the wild register. The MB89202/ F202RA series incorporates two bytes for each register.

Control circuit part

This part compares the data held in the address set registers and the actual data on the address bus. If it detects a match, it sets the data in the data setting register to the data bus. The control circuit part can control the operation by the address comparison EN register.

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Fujitsu F202RA, MB89202 manual Configuration of the Wild Register Function, Memory area part, Control circuit part

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.