Flag Addressing, TF1, *0x20 | Texas Instruments MSP50C614 instruction

Instruction Syntax and Addressing Modes

4.3.7Flag Addressing

This addressing mode addresses only the 17th bit (the flag/tag bit) located in data memory. This addressing applies to Class 8a instructions as explained in section 4.4. Using flag addressing, the flag bit can be loaded or saved. In addition, various logical operations can be performed without affecting the re- maining 16 bits of the selected word. Two addressing modes are provided. The first addressing mode, global flag addressing, has bit 0 set to zero and a six bit field (b1±b6) that defines the flag word address. The second mode, relative flag addressing, has bit 0 set to one and a six bit field (b1±b6) that defines the flag address relative to R6 (see Figure 4±2). In other words, the, i.e., effective address = (contents of R6) + (6 bit offset). In flag addressing, R6 contains the address that points to the 17th bit. This should not be confused with byte ad- dresses and word addresses.

Figure 4±2. Relative Flag Addressing

PAGE register

Address

6-Bit positive offset

		Operand
Syntax:
	name {dest}, {src}
Global Flag:	name TFn, dma6
	name dma6, TFn
Relative Flag:	name TFn, *R6+offset6
	name *R6+offset6, TFn
Example 4.3.24	MOV *0x02, TF2

Take the test flag 2 bit (TF2 in the status register) and place it into the 17th bit of the data memory location 0x02.

Example 4.3.25

AND TF1, *0x20

AND the test flag 1 bit (TF1 in status register) with the 17th bit of the data memory location 0x20 and store the result in the TF1 bit of the STAT.

Example 4.3.26

OR TF2, *R6+0x02

OR the test flag 2 bit (TF2 in status register) with the 17th bit of the data memory location *(R6+0x02) and store the result in the TF2 bit in of the status register. So, if R6=0x0100, then relative flag address is 0x0102.

Example 4.3.27

XOR TF1, *R6+0x20

XOR the test flag 1 bit (TF1 in status register) with the 17th bit of the data memory location *(R6+0x20) and store the result in TF1 bit of the status register. So, if R6=0x0100, then relative flag address is 0x0120.

Assembly Language Instructions

4-19

MSP50C614 specifications

The Texas Instruments MSP50C614 is a microcontroller that belongs to the MSP430 family, renowned for its low power consumption and versatile functionality. Primarily designed for embedded applications, this microcontroller is favored in various industries, including consumer electronics, industrial automation, and healthcare devices.

One of the standout features of the MSP50C614 is its ultra-low power technology, which enables it to operate in various power modes. This makes it ideal for battery-powered applications, where energy efficiency is crucial. The MSP430 architecture allows for a flexible power management system, ensuring that energy is conserved while providing robust performance.

The MSP50C614 is equipped with a 16-bit RISC CPU that delivers high performance while maintaining low power usage. With a maximum clock frequency of 16 MHz, it can execute most instructions in a single cycle, resulting in swift operation and responsive performance. This microcontroller also comes with a generous flash memory capacity, allowing developers to store large amounts of code and data conveniently.

In terms of peripherals, the MSP50C614 is highly versatile. It features a range of digital and analog input/output options, including multiple timers, GPIO ports, and various communication interfaces like UART, SPI, and I2C. This extensive set of peripherals allows for seamless integration with other components and simplifies the design of complex systems.

The integrated 12-bit Analog-to-Digital Converter (ADC) stands out as a valuable characteristic of the MSP50C614. This feature enables the microcontroller to convert physical analog signals into digital data, making it particularly useful for sensing applications and real-time monitoring.

Another noteworthy technology employed in the MSP50C614 is its support for low-voltage operations. With a broad supply voltage range, this microcontroller can function efficiently in diverse environments and is suitable for low-power applications, enhancing its practicality.

Moreover, Texas Instruments provides software support in the form of Code Composer Studio and various libraries that make it easier for developers to program and utilize the MSP50C614 effectively.

In summary, the Texas Instruments MSP50C614 microcontroller is a powerful, low-power solution equipped with the features and technologies necessary for efficient operation in a wide array of applications. Its blend of performance, flexibility, and energy efficiency makes it a popular choice among engineers and designers looking to create innovative, sustainable designs in the rapidly evolving tech landscape.

Texas Instruments MSP50C614 Flag Addressing, TF1, 0x20, Or TF2, R6+0x02, XOR TF1, *R6+0x20

Models: MSP50C614