CHAPTER 14 8-BIT SERIAL I/O

When the External Shift Clock is Used

8-bit serial I/O operation in sleep mode

In sleep mode, as shown in Figure 14.8-4 , the 8-bit serial I/O continues data transfer without stopping the

serial I/O operation.

Figure 14.8-4 8-bit Serial I/O Operation in Sleep Mode (External Shift Clock)

SCK input

SST bit

SIOF bit

SO pin output

STP bit

(STBC register)

Clock for the next data

Transfer stop state

Clear via program

Interrupt request

#0 #1 #2 #3 #4 #5 #6 #7

Sleep mode

Sleep mode release via IRQC

8-bit serial I/O operation in stop mode

In stop mode, as shown in Figure 14.8-5 , the 8-bit serial I/O stops the serial I/O operation and suspends data transfer. After stop mode has been released, a transfer destination error occurs because operation is resumed halfway. In this case, initialize the 8-bit serial I/O.

Figure 14.8-5 8-bit Serial I/O Operation in Stop Mode (External Shift Clock)

SCK input

 

 

 

 

 

 

Clock for the next data

 

 

 

 

 

 

 

 

SST bit

 

 

 

 

#6

#7

Oscillation stabilization

 

 

 

 

 

 

 

wait time

Clear via

 

 

 

 

 

Stop mode request

 

program

 

 

 

 

 

 

 

SIOF bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interrupt

 

 

 

 

 

 

 

 

request

SO pin output

#0

#1

#2

#3

#4

#5

#6

#7

 

 

 

 

 

 

 

 

 

 

 

 

 

Stop mode

Transfer error occurrence

 

 

 

 

 

 

 

STP bit

 

 

 

 

 

 

 

 

(STBC register)

 

 

 

 

Stop mode release via external interrupt

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Fujitsu F202RA, MB89202 manual When the External Shift Clock is Used, 331

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.