CHAPTER 10 EXTERNAL INTERRUPT CIRCUIT 1 (EDGE)

10.3Pins of External Interrupt Circuit 1

This section describes the pins associated with external interrupt circuit 1 and illustrates a block diagram of circuitry terminating at the pins with reference to the registers and external interrupt triggering.

■Pins Associated with External Interrupt Circuit 1

The pins associated with external interrupt circuit 1 are the P34/TO/INT10 to P36/INT12 pins.

●P34/TO/INT10 pin

This pin functions as a general-purpose I/O dedicated port and may also serve 8/16-bit capture timer outputs (TO) and external interrupt inputs (hysteresis inputs) (INT10).

If the timer 1 control register (TCR0) disables 8/16-bit capture timer outputs and, by the port data direction register (DDR3), the pin is set to function as an input port only. The pin can also function as an external interrupt input pin (INT10). When external interrupt 1 control register 1 (EIC1) sets edge detection to OFF, however, no external interrupt requests are generated, and when interrupt request outputs are disabled, no interrupt requests are output. The pin state can be read directly from the port data register (PDR3) at any time.

●P35/INT11 and P36/INT12 pins

These pins function as a general-purpose I/O dedicated port (P35, P36) and may also serve external interrupt inputs (hysteresis inputs) (INT11, INT12).

If, by the port data direction register (DDR3), these pins are set to function as an input port only, they also function as external interrupt input pins (INT11, INT12). When external interrupt 1 control registers 1 and 2 (EIC1, EIC2) set edge detection to OFF, however, no external interrupt requests are generated, and when interrupt request outputs are disabled, no interrupt requests are output. The pin state can be read directly from the port data register (PDR3) at any time.

Table 10.3-1lists the pins associated with external interrupt circuit 1.

Table 10.3-1 Pins Associated with External Interrupt Circuit 1

 

Use for external interrupt input

Use for input port only

External interrupt pin

(Interrupt request output or edge detection

(Interrupt request output enabled)

 

disabled)

 

 

 

 

 

P34/TO/INT10

INT10 (EIC1:EIE0=1, DDR3:bit4=0,

P34(EIC1:EIE0=0 or SL01, SL00=00B)

TCR2:PEN=0)

 

 

 

 

 

P35/INT11

INT11 (EIC1:EIE1=1, DDR3:bit5=0)

P35(EIC1:EIE1=0 or SL11, SL10=00B)

 

 

 

P36/INT12

INT12 (EIC2:EIE2=1, DDR3:bit6=0)

P36(EIC2:EIE2=0 or SL21, SL20=00B)

 

 

 

INT10 to INT12: When a signal with an edge or edges corresponding to the selected edge polarity is input to these pins, an interrupt corresponding to the pin is generated.

229

Page 244 Page 246
Page 245
Image 245
Fujitsu F202RA, MB89202 manual Pins of External Interrupt Circuit, P35/INT11 and P36/INT12 pins, TCR2PEN=0
Page 244 Page 246

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.
Top Page Image Contents