Addressing Modes

3.3.4Absolute Mode

The absolute mode is described in Table 3−7.

Table 3−7. Absolute Mode Description

Assembler Code

Content of ROM

MOV

&EDE,&TONI

MOV X(0),Y(0)

 

 

X = EDE

 

 

Y = TONI

Length:

Two or three words

 

Operation:

Move the contents of the source address EDE to the

 

destination address TONI. The words after the instruction

 

contain the absolute address of the source and destination

 

addresses. With absolute mode, the 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 Space

01114h

0F016h

04292h

0xxxxh

0A123h

0xxxxh

0xxxxh

01234h

0xxxxh

After:

Register

0FF16h

0FF14h

PC0FF12h

0F018h

0F016h

0F014h

01116h

01114h

01112h

Address Register

Space

0xxxxh PC

01114h

0F016h

04292h

0xxxxh

0A123h

0xxxxh

0xxxxh

0A123h

0xxxxh

This address mode is mainly for hardware peripheral modules that are located at an absolute, fixed address. These are addressed with absolute mode to ensure software transportability (for example, position-independent code).

RISC 16-Bit CPU

3-13

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Texas Instruments MSP430x1xx manual 7. Absolute Mode Description
Page 48 Page 50

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.
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