CHAPTER 8 8/16-BIT CAPTURE TIMER/COUNTER

Table 8.4-1 Explanation of Functions of Each Bit in Capture Control Register (TCCR)

 

Bit name

Function

 

 

 

 

CPIF:

• This bit is set to "1" when the edge specified by EDGS1 and EDGS0 is

 

detected.

bit7

Capture edge detection

An interrupt request is output when this bit and the capture interrupt request

 

flag bit

 

enable bit (CPIEN) are "1".

 

 

 

 

 

 

CFCLR:

• This bit is used to clear the capture edge detection flag.

bit6

Capture edge detection

• When this bit is "1" at write, the capture edge detection flag is cleared. When

 

flag clear bit

"0", the capture edge detection flag is not affected (remains unchanged).

 

 

 

 

CPIEN:

• This bit is used to allow and prohibit interrupt request output to the CPU.

bit5

Capture interrupt request

• An interrupt request is output when this bit and the capture edge detection flag

 

enable bit

bit (CPIF) are "1".

 

 

 

 

CCMSK:

• The counter state when a capture match is detected is set.

bit4

Counter clear mask bit

• When this bit is "0", the counter is cleared. When this bit is "1", the counter is

 

(at capture operation)

not cleared.

 

 

 

 

TCMSK:

• The counter state when a compare edge is detected is set.

bit3

Compare match counter

• When this bit is "0", the counter is cleared. When this bit is "1", the counter is

 

clear mask bit

not cleared.

 

 

 

 

 

• These bits are used to allow and prohibit the capture function and select

 

EDGS1 and EDGS0:

capture edges.

bit2,

Capture mode enable/

• When using the 8/16-bit capture timer/counter in the capture mode, set these

bit1

edge detection selection

bits to a value other than "00B".

 

bits

• When the edge set by these bits is input, the capture edge detection flag bit

 

 

(CPIF) is set to "1".

 

 

 

bit0

RESV: Reserved bit

• Even if this bit is set to "0" or "1", the operation is not affected. The value

previously written becomes the read value.

 

 

 

 

 

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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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