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Fujitsu MB89202, F202RA manual Interval Time and Square Wave Output Range in 16-bit Mode, 164

Models: F202RA MB89202

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CHAPTER 8 8/16-BIT CAPTURE TIMER/COUNTER

Table 8.1-3 Interval Time and Square Wave Output Range in 16-bit Mode

Count clock cycle

Interval time

Square wave output range (Hz)

 

 

 

 

 

 

 

 

 

 

 

 

2tINST

2t

 

to 217t

1/ (22t

INST

) to 1/ (218t

 

)

 

 

INST

INST

 

 

INST

 

 

 

 

 

 

 

 

 

 

 

 

4tINST

22t

INST

to 218t

1/ (23t

INST

) to 1/ (219t

 

)

 

 

 

INST

 

 

INST

 

16tINST

24t

INST

to 220t

1/ (25t

INST

) to 1/ (221t

 

)

 

 

 

INST

 

 

INST

Internal count clock

64tINST

26t

INST

to 222t

1/ (27t

INST

) to 1/ (223t

 

)

 

 

 

INST

 

 

INST

 

 

 

 

 

 

 

 

 

 

 

 

128tINST

27t

INST

to 223t

1/ (28t

INST

) to 1/ (224t

 

)

 

 

 

INST

 

 

INST

 

256tINST

28t

INST

to 224t

1/ (29t

INST

) to 1/ (225t

 

)

 

 

 

INST

 

 

INST

 

512tINST

29t

INST

to 225t

1/ (210t

 

) to 1/ (226t

 

)

 

 

 

INST

 

 

INST

 

INST

 

 

 

 

 

 

 

 

 

 

External clock

1tEXT

1t

to 216t

1/ (2t

 

) to 1/ (217t

EXT

)

 

 

 

EXT

EXT

 

EXT

 

 

tINST : Instruction cycle (this cycle is affected by the clock mode, etc.)

tEXT : External clock cycle (1tEXT greater than or equal to 4tINST)

Note:

Example of calculating interval time and square wave frequency

If the oscillation (FCH) is set to 12.5 MHz, the timer 0 data register (TDR0) value is set to DDH(221), and the count clock cycle is set to 2tINST 8-bit mode operation, the interval time of timer 0 and the square wave frequency output from the TO pin when the interval timer function is operated continuously without modifying the TDR0 register value are calculated from the following expressions: However, the values calculated from these expressions are valid when the highest speed clock of the normal mode (CS1, CS0 = 11B, 1 instruction cycle = 4/FCH) is selected according to the system clock control register (SYCC).

Interval time = (2 ⋅ 4/FCH) ⋅ (TDR0#1 register value + 1)

=(8/12.5 MHz) ⋅ (221 + 1) 142.1 ∝s

Output frequency = FCH/(2 ⋅ 8 ⋅ (TDR0#1 register value + 1))

=12.5 MHz/(16 ⋅ (221 + 1)) 3.53 kHz

164

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Fujitsu MB89202, F202RA manual Interval Time and Square Wave Output Range in 16-bit Mode, 164
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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.