Symbolic Mode | Texas Instruments MSP430x1xx specs

Addressing Modes

3.3.3Symbolic Mode

The symbolic mode is described in Table 3−6.

Table 3−6. Symbolic Mode Description

	Assembler Code	Content of ROM
	MOV EDE,TONI	MOV X(PC),Y(PC)
		X = EDE − PC
		Y = TONI − PC
Length:	Two or three words
Operation:	Move the contents of the source address EDE (contents of
	PC + X) to the destination address TONI (contents of PC + Y).
	The words after the instruction contain the differences
	between the PC and the source or destination addresses.
	The assembler computes and inserts offsets X and Y
	automatically. With symbolic mode, the program counter (PC)
	is incremented automatically so that program execution
	continues with the next instruction.
Comment:	Valid for source and destination
Example:	MOV EDE,TONI ;Source address EDE = 0F016h
		;Dest. address TONI=01114h

Before:

0FF16h

0FF14h

0FF12h

0F018h

0F016h

0F014h

01116h

01114h

01112h

Address		Register	After:
Address		Register
Space
			0FF16h

011FEh

0F102h			0FF14h

04090h	PC		0FF12h
		0FF14h



0xxxxh		+0F102h	0F018h
		0F016h
0A123h		0F016h	0F016h
0A123h			0F016h

0xxxxh			0F014h
		0FF16h



0xxxxh		+011FEh	01116h
		01114h
05555h		01114h	01114h
05555h			01114h

0xxxxh			01112h

Address Register

Space

0xxxxh PC

011FEh

0F102h

04090h

0xxxxh

0A123h

0xxxxh

0A123h

0xxxxh

3-12RISC 16-Bit CPU

MSP430x1xx specifications

The Texas Instruments MSP430x1xx series is a family of ultra-low-power microcontrollers that are highly regarded in the embedded systems community for their versatility and performance. Designed for applications ranging from portable instrumentation to low-power industrial devices, the MSP430x1xx combines flexibility and efficiency with advanced features tailored for energy-sensitive applications.

One of the standout characteristics of the MSP430x1xx is its ultra-low-power operation. This series offers several low-power modes that can significantly extend battery life in portable devices. The microcontroller can be in active mode, low-power mode, or even in a deep sleep state, allowing developers to optimize power consumption based on the application's requirements. In fact, some configurations can operate at just a few microamps, making it ideal for battery-operated devices.

Another key feature is the 16-bit RISC architecture that provides powerful processing capabilities while maintaining a low power profile. The MSP430x1xx series supports a maximum clock speed of 16 MHz, allowing for efficient task execution while consuming minimal energy. This architecture ensures that programs run smoothly while the microcontroller remains energy efficient.

The MSP430x1xx is equipped with various integrated peripherals, including analog-to-digital converters (ADCs), timers, and communication interfaces like UART, SPI, and I2C. The inclusion of a powerful ADC enables the microcontroller to handle sensor readings with high accuracy, making it suitable for applications like environmental monitoring and medical devices. The integrated timers provide essential functionality for real-time applications, allowing for event-driven programming and precise timing control.

Memory options in the MSP430x1xx series are also robust, with configurations offering flash memory sizes from 1 KB to 64 KB. This flexibility allows developers to choose the optimal memory size for their specific applications, accommodating a wide range of requirements.

Additionally, the MSP430x1xx microcontrollers are designed with a wide operating voltage range, typically from 1.8V to 3.6V, making them compatible with various power sources and further enhancing their usability in diverse applications.

In summary, the Texas Instruments MSP430x1xx series of microcontrollers is an excellent choice for developers seeking low-power, high-performance solutions for embedded applications. With an efficient architecture, a rich set of peripherals, and flexible memory options, these microcontrollers are positioned to meet the growing demands of modern electronic designs, particularly in battery-powered and energy-sensitive applications.

Texas Instruments MSP430x1xx manual 6. Symbolic Mode Description

Models: MSP430x1xx

3.3.3Symbolic Mode

Table 3−6. Symbolic Mode Description

Assembler Code

Comment:

Valid for source and destination

Example:

;Dest. address TONI=01114h

MSP430x1xx specifications