Siof, Sioe, CKS1, CKS0, 321 | Fujitsu F202RA, MB89202 specification

CHAPTER 14 8-BIT SERIAL I/O

Table 14.4-1 Explanation of Functions of Each Bit in Serial Mode Register (SMR) (1/2)

	Bit name		Function

		• When 8-bit serial data is input or output during serial I/O operation, this
	SIOF:		bit is set to "1". When this bit and the interrupt request allowance bit
bit7	SIOF:		(SIOE) are "1", an interrupt request is output.
bit7	Interrupt request flag bit		(SIOE) are "1", an interrupt request is output.
	Interrupt request flag bit	• Setting this bit to "0" clears it, while setting it to "1" does not affect this

			bit or implement any changes.

	SIOE:	This bit is used to allow and prohibit interrupt request output to the CPU.
bit6	Interrupt request	When this bit and the interrupt request allowance bit (SIOF) are "1", an
	allowance bit	interrupt request is output.

		• This bit is used to control shift clock I/O.
		• When this bit is "0", the P30/UCK/SCK pin functions as the shift clock
			input pin. When "1", it functions as the shift clock output pin.
		Notes:
		•	To use the P30/UCK/SCK pin as the shift clock input pin, it must be set
			as an input port. Also select the external shift clock with the shift clock
	SCKE:		selection bits (Set the CKS1 and CKS0 bits to 11B).
bit5	Shift clock output	•	For shift clock output (SCKE bit = 1), select an internal shift clock (do
	allowance bit		not set the CKS1 and CKS0 bits to 11B).
		Notes:
		•	When shift clock output is allowed (when this bit is "1"), the P30/UCK/
			SCK pin functions as the UCK/SCK output pin irrespective of the
			general-purpose port (P30) state.
		•	When using the P30/UCK/SCK pin as a general-purpose port (P30), set
			its pin as the shift clock input pin (set this bit to "0").

		When this bit is "0" the P31/UO/SO pin functions as a general-purpose port
		(P31). When "1", the P31/UO/SO pin functions as the serial data output pin
	SOE:	(UO/SO).
bit4	Serial data output	Note:
	allowance bit		When serial data output is allowed (when this bit is set to "1"), the P31/
			UO/SO pin functions as the UO/SO pin irrespective of the general-
			purpose port (P31) state.

		• These bits are used to select three internal shift clocks or one external
			shift clock.
		• When these bits are not 11B, an internal shift clock is selected. When the
bit3,	CKS1, CKS0:		shift clock output allowance bit (SCKE) is "1", a shift clock is output
bit3,	CKS1, CKS0:		from the UCK/SCK pin.
bit2	Shift clock selection bits		from the UCK/SCK pin.
bit2	Shift clock selection bits	• When these bits are 11B, the external clock is selected. When the P30/

			UCK/SCK pin is set as the shift clock input pin, a shift clock is input
			from the UCK/SCK pin (when the SCKE bit and bit0 of the DDR3 are
			"0").

321 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 F202RA, MB89202 manual Siof, Sioe, CKS1, CKS0, 321

Models: F202RA MB89202

CHAPTER 14 8-BIT SERIAL I/O

Bit name

SIOF:

SIOE:

SCKE:

SOE:

CKS1, CKS0:

321

F202RA, MB89202 specifications