Operations of Port 7 Functions | Fujitsu F202RA, MB89202 specification

CHAPTER 4 I/O PORTS

4.7.2Operations of Port 7 Functions

This section describes the operation of port 7.

■Operation of Port 7

●Operation in output port mode

When "1" is written for a bit of the DDR7 register, the bit corresponding to a pin of port 7, the pin functions as an output port.

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

Once data has been written into the PDR7 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 PDR7 register.

●Operation in input port mode

When "0" is written for a bit of the DDR7 register, the bit corresponding to a pin of port 7, the pin functions as an input port.

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

Once data has been written into the PDR7 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 PDR7 register.

●Operation when a reset is performed

When the CPU is reset, the bits of the DDR7 register are initialized to "0". Thus, all output transistors become OFF and the pins become Hi-Z.

However, CPU resets do not initialize the PDR7 register. If a pin is used as an output port after the reset, reinitialize the PDR7 register to contain new output data in the bit position corresponding to the pin and then set the corresponding bit of the DDR7 register so that the pin will function as an output port.

●Operation in stop mode

When the pin state setting bit of the standby control register (STBC: SPL) is "1" and when the stop mode is entered, the output transistor is turned OFF and the pin becomes Hi-Z because the output transistor is forcibly turned OFF without respect to the value existing on the DDR7 register in the bit position corresponding to the pin.

Input remains fixed to prevent leaks by input open.

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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.

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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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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.

Fujitsu F202RA, MB89202 manual Operations of Port 7 Functions, Operation in output port mode

Models: F202RA MB89202