Operation at Serial Output Completion, 326

CHAPTER 14 8-BIT SERIAL I/O

●Serial output operation using external shift clock

Serial output operation with the external shift clock requires the settings shown in Figure 14.6-2 .

Figure 14.6-2 Settings Required for Serial Output Operation using External Shift Clock

	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
SMR	SIOF	SIOE	SCKE	SOE	CKS1	CKS0	BDS	SST
			0	1	1	1		1
SDR			Transmission data setting
DDR3
								0
SSEL								SSEL
								1
	: Used bit
	: Unused bit
0	: Set "0"
1	: Set "1"

When serial output operation is allowed, the contents of the SDR are output to the SO pin in synchronization with the falling edge of the external shift clock. When serial operation is completed, immediately reset the SDR, set it again, then allow serial output operation (SMR: SST = 1) to prepare for the output of the next data.

When the remote serial input operation (rising edge) is completed and the 8-bit serial I/O enters the idle state (state in which it waits for the output of the next data), set the external shift clock to a high level.

Figure 14.6-3shows 8-bit serial output operation.

Figure 14.6-3 8-bit Serial Output Operation

For LSB first
	bit7	bit6	bit5	bit4	bit3		bit2	bit1	bit0	SO pin
										SO pin
SDR	#7	#6	#5	#4	#3		#2	#1	#0
Serial output data
		#0	#1		#2	#3	#4	#5	#6	#7
Shift clock										Clear via program
Shift clock		0	1	2	3		4	5	6	7
		0	1	2	3		4	5	6	7
SIOF bit
	Transfer start									Interrupt request
SST bit
									Automatic clear at transfer end

■Operation at Serial Output Completion

At the rising edge of the shift clock for serial data of the 8th bit, the interrupt request flag bit (SMR: SIOF)

is set to "1" and the serial I/O start bit (SMR: SST) is set (cleared) to "0".

326 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.

Fujitsu MB89202, F202RA manual Operation at Serial Output Completion, 326

Models: F202RA MB89202