What happens to the R0 register value after the execution of DEC R0 in 8051(before the execution R0=0x00).

More Saranya B's questions See All

Can anyone suggest a basic controller to learn and implement Internet of Things (IoT)?

- A basic controller to learn and implement IoT concept

01 January 1970 6,888 6 View

Is it possible to control more nodes using IoT?

Is there any software to control more nodes using IoT?

01 January 1970 1,500 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

I need dataset for recommandation system?

Hi every body I need to collect datasets from different source to work on recommendation system algorithms, could you advise me how collect data?

27 February 2021 7,063 7 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

How to model Supercritical water gasification (SCWG) process in Homer software?

Hi everyone How to model Supercritical water gasification (SCWG) process in Homer software?

25 February 2021 4,075 1 View

U. Dreher

Honestly?

It's rollIng over to 0xFF.

Joerg Fricke

And the flag C is not affected. (It's nice to meet someone who is speaking the native language of the respective microcontroller instead of using newfangled unspecific contraptions like high level languages. ;-)

Rahis Kumar Yadav

Value remains same in register the register R0

@Rahis Kumar Yadav: Sorry, but that's not correct, and U. Dreher is right: Both "INC" and "DEC" cause cyclic counting, i. e. in the upward direction (INC) is the maximum value (0xFF for 8 bit) followed by the minimum value (0x00), and vice versa in the downward direction (DEC). INC and DEC work as well if you interpret the register content as two's complement numbers: Counting down, after 0 = 0x00 comes -1 = 0xFF.

P.S. @Rahis Kumar Yadav: On a second thought and reading the question again, you are right: After the execution of DEC R0 the content of the register remains 0xFF until another instruction changes it. ;-)