Program Example for 8-bit Serial Input, Pushw MOV

				CHAPTER 14 8-BIT SERIAL I/O
;--------------------	Interrupt processing routine----------------------------------------------------------
WARI	CLRB	SIOF	;	Clears the interrupt request flag.
	PUSHW	A
	XCHW	A,T	;	Saves A and T.
	PUSHW	A
	MOV	SDR,#55H	;	Resets transfer data (55H).
	SETB	SST	;	Starts serial I/O transfer.
	:
	User processing
	:
	POPW	A
	XCHW	A,T	;	Returns A and T.
	POPW	A
	RETI
	ENDS

; -------------------------------------------------------------------------------------------------------------------

END

■Program Example for 8-bit Serial Input

●Processing specifications

•The 8-bit serial input program inputs 8-bit serial data from the SI pin of the 8-bit serial I/O. When serial I/O transfer terminates, an interrupt occurs.

•The program reads transfer data with the interrupt processing routine and inputs it continuously.

•The program uses the external shift clock to be input from the SCK pin.

●Coding example

DDR3	EQU	000DH	;	Address of data direction register 3
SMR	EQU	0039H	;	Address of serial mode register
SDR	EQU	003AH	;	Address of serial data register
SSEL	EQU	003BH	;	Address of serial/UART selection register
SIOF	EQU	SMR:7	;	Defines the interrupt request flag bit.
SST	EQU	SMR:0	;	Defines the serial I/O transfer start bit.
ILR4	EQU	007EH	;	Address of interrupt request setting register 4
INT_V	DSEG	ABS	;	[DATA SEGMENT]
	ORG	0FFE2H
IRQC	DW	WARI	;	Sets an interrupt vector.
INT_V	ENDS
;--------------------		Main program---------------------------------------------------------------------------
	CSEG		;	[CODE SEGMENT]
			;	The stack pointer (SP), etc., is already initialized.
	:
	MOV	DDR3,#00000000B ;		Sets the P30/SCK and P32/SI pins to input.
	CLRI		;	Disables interrupts.
	CLRB	SST	;	Stops serial I/O transfer.
	MOV	ILR4,#11111101B	;	Sets the interrupt level to 1.

337 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 Program Example for 8-bit Serial Input, Wari Clrb Siof, Pushw MOV, 337

Models: F202RA MB89202

CHAPTER 14 8-BIT SERIAL I/O

WARI

CLRB

SIOF

PUSHW

MOV

SST

POPW

RETI

ENDS

END

■Program Example for 8-bit Serial Input

●Processing specifications

●Coding example

SST

337

F202RA, MB89202 specifications