Operations of Port 3 Functions | Fujitsu MB89202, F202RA guide

CHAPTER 4 I/O PORTS

4.3.2Operations of Port 3 Functions

This section describes the operation of port 3.

■Operation of Port 3

●Operation in output port mode

When "1" is written for a bit of the DDR3 register, the bit corresponding to a pin of port 3, the pin functions as an output port.

In output port mode, output transistor operation is enabled and output latch data is output to the pin.

Once data has been written into the PDR3 register, the written data is held in the output latch and output to the pin as it is.

The value state of the pin can be read by reading the PDR3 register.

●Operation in input port mode

When "0" is written for a bit of the DDR3 register, the bit corresponding to a pin of port 3, the pin functions as an input port.

In input port mode, the output transistor is OFF and the pin state is Hi-Z.

Once data has been written into the PDR3 register, the written data is held in the output latch but is not output to the pin.

The value state of the pin can be read by reading the PDR3 register.

●Operation in external interrupt input mode

Set a bit of the DDR3 register to "0", the bit corresponding to a pin of port 3 that is to serve as an external interrupt input pin, to set the pin to function as an input port.

The value state of the pin can be read by reading the PDR3 register regardless of whether or not the external interrupt inputs or interrupt request outputs are enabled.

●Operation in mode enabling the output from a peripheral

When the output enable bit for a peripheral is set to enable, the corresponding pin is set to serve the output from the peripheral.

Because the value state of the pin can be read from the PDR3 register even when the output from the peripheral is enabled, the value output from the peripheral can be read.

●Operation in mode enabling the input to a peripheral

Set a bit of the DDR3 register to "0", the bit corresponding to the pin of port 3 assigned for the input to the desired peripheral, for the pin to function as an input port.

The value state of the pin is always input to the peripheral (except during stop mode).

The value state of the pin can be read by reading the PDR3 register regardless of whether or not the peripheral is using the input pin.

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.

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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.

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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.

Fujitsu MB89202, F202RA manual Operations of Port 3 Functions

Models: F202RA MB89202