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Texas Instruments MSP50C614 manual Cmpb Compare Two Bytes, Cmpb R3

Models: MSP50C614

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Individual Instruction Descriptions

4.14.11 CMPB

 

 

Compare Two Bytes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Syntax

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[label]

name

 

src, src1

 

 

 

 

 

 

Clock, clk

 

Word, w

 

 

With RPT, clk

 

Class

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CMPB

 

An, imm8

 

 

 

 

 

 

 

1

 

 

 

1

 

 

 

 

 

N/R

 

 

 

2a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CMPB

 

Rx, imm8

 

 

 

 

 

 

 

1

 

 

 

1

 

 

 

 

 

N/R

 

 

 

4b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Execution

status flags set by

src

±

src1 byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PC ⇐ PC + 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flags Affected

src is An:

 

 

 

OF, SF, ZF, CF are set accordingly

 

 

 

 

 

 

 

 

 

src is Rx:

 

 

 

RCF, RZF are set accordingly

 

 

 

 

 

 

 

 

Opcode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Instructions

 

16

 

15

14

13

12

 

11

10

9

8

 

7

 

6

 

5

 

4

3

2

1

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CMPB An, imm8

 

1

 

0

1

0

0

 

1

1

An

 

 

 

 

 

 

 

 

imm8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CMPB Rx, imm8

 

 

1

 

0

1

1

1

 

1

k4

k3

k2

 

k7

 

k6

 

k5

 

 

Rx

 

k1

 

k0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Description

Subtract value of src1 (zero filled in upper 8 bits) from src (i.e., src±src1) and

 

 

 

only modify the status flags. Contents of src not changed.

 

 

 

 

 

 

See Also

CMP, CMPS, Jcc, Ccc

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Example 4.14.11.1

CMPB A0, 0xf3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compare immediate value 0xf3 to accumulator A0.

Example 4.14.11.2

CMPB R3, 0x21

Compare immediate value 0x21 to R3.

4-92

Page 183 Page 185
Page 184
Image 184
Texas Instruments MSP50C614 manual Cmpb Compare Two Bytes, Cmpb R3
Page 183 Page 185

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.