Individual Instruction Descriptions

4.14.7 BEGLOOP

Begin Loop

 

 

 

Syntax

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[label]

name

 

Clock, clk

Word, w

With RPT, clk

Class

 

 

 

 

 

 

 

 

 

 

BEGLOOP²

 

1

1

N/R

9d

²Loop must end with ENDLOOP.

Execution

Save next instruction address (PC + 1)

 

(mask interrupts)

 

PC PC + 1

Flags Affected

none

Opcode

 

Instructions

BEGLOOP

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Description

This instruction saves the next sequential address in a shadow register and

 

masks interrupts. Interrupts occurring during execution of this and following

 

instructions are actually queued until the loop is complete (see ENDLOOP).

 

The loop executes N number of times. Thus, N ± 2, should be loaded in R4

 

in order to loop N times.

BEGLOOP and ENDLOOP block has following restrictions:

-No CALL instructions can be used.

-All maskable interrupts are queued.

-BEGLOOP/ENDLOOP block cannot be nested.

See Also

ENDLOOP

Example 4.14.7.1 MOV R4, count ± 2 ;init R4 with loop count

BEGLOOP

ADD A0, A0~, A0 ;add A0~ to A0 (count) times

ENDLOOP

Initialize R4 with the loop count value minus 2 to repeat the loop for count times. Execute the ADD A0, A0~, A0 instruction until R4 is negative. R4 is decremented each time ENDLOOP is encountered. When R4 is negative, ENDLOOP becomes a NOP and execution continues with the next instruction after

ENDLOOP.

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Texas Instruments MSP50C614 Begloop Begin Loop, Save next instruction address PC +, Flags Affected None Opcode, Endloop

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.