CHAPTER 8 8/16-BIT CAPTURE TIMER/COUNTER

8.1Overview of 8/16-bit Capture Timer/Counter

The 8/16-bit capture timer/counter consists of two 8-bit counters (timer 0 and timer 1). These counters can be used separately (8-bit mode) or in combination (16-bit mode). Timer 0 provides seven internal count clocks. This timer can select the interval timer function or counter function. The interval timer function increments the counter value in synchronization with one of the seven internal clocks. The counter function increments the counter value according to the clock to be input to an external pin. Timer 0 can output square waves of any frequency according to outputs from the interval timer and counter.

Timer 1 provides seven internal count clocks. This timer can output square waves of any frequency but can use only the interval timer function that increments the timer value in synchronization with one of the seven internal counter clocks. For the 16-bit mode, timer 0 and timer 1 are connected in series to serve as a 16-bit timer.

■Interval Timer Function

The interval timer function generates interrupt requests repeatedly at any time interval.

This function can also invert the output level of P34/TO/INT10 pin per time interval and output square waves of any frequency.

•In the 8-bit mode, the interval timer function operates as two independent timers: timer 0 (8-bit capture timer/counter) and timer 1 (8-bit timer). Interval timer operation from each count clock cycle to a 28 times cycle is possible.

•The interval timer function can select and output square waves to the TO pin according to the timer 0 or

1output.

•In the 16-bit mode, the interval timer function operates as a 16-bit capture timer/counter in which timer

0is concatenated as the lower counter and timer 1 is concatenated as the upper counter. Interval timer

operation from the count clock cycle to the 216 times cycle is possible.

•The count clock can be selected from the seven internal clock cycles (if timer 0 selects an external clock, the interval timer function operates as the capture/counter function).

•The timer 0 output cycle can be used as the clock for starting A/D converters continuously or as the 8- bit PWM timer count clock.

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Fujitsu MB89202, F202RA manual Overview of 8/16-bit Capture Timer/Counter, BIT Capture TIMER/COUNTER
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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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