Operation at Serial Input Completion, 328

CHAPTER 14 8-BIT SERIAL I/O

●Serial input operation using external shift clock

Serial input operation with the external shift clock requires the settings shown in Figure 14.7-2 .

Figure 14.7-2 Settings Required for Serial Input 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
SDR				Reception data storage
DDR3
							0		0
SSEL									SSEL
									1
	: Used bit		0	: Set "0"
	: Unused bit		1	: Set "1"

When serial input operation is allowed, the value of the SI pin is captured and held in the SDR in synchronization with the rising edge of the external shift clock. When serial input is completed, immediately read the SDR and allow serial input operation (SMR: SST = 1) to prepare for the input of the next data. In this case, when the 8-bit serial I/O is idle (state in which it is waiting for the output of the next data), keep the external shift clock at a "H" level.

Figure 14.7-3shows 8-bit serial input operation.

Figure 14.7-3 8-bit Serial Input Operation

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

■Operation at Serial Input Completion

At the rising edge of the shift clock for the 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".

328 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 Input Completion, 328

Models: F202RA MB89202