What are the working modes of the P0.0 pin of the 51 single-chip microcomputer? What is its input or output resistance in these working modes?

EEW2018

What are the working modes of the P0.0 pin of the 51 single-chip microcomputer? What is its input or output resistance in these working modes? [Copy link]

Excuse me

1. What are the working modes of the P0.0 pin of the 51 single-chip microcomputer?

2. What is its input or output resistance under these working modes, what is its output voltage, and what is its output resistance?

I have just started to learn microcontrollers, so please don't be annoyed.

maychang

Here I am asking about the input and output resistance of the microcontroller again.

I remember I have replied: In this working state, the input and output resistances are meaningless.

maychang

The P0 port of the 51 single-chip microcomputer has two "working modes", but unlike the P3 port, the functions of the P0 pins are the same, not that the pins of the P0 port have different functions. So it is meaningless to ask "what are the working modes of the P0.0 pin".

maychang

"What is the output voltage and output resistance?"

What is the output voltage of port P0? Didn't you even read the datasheet?

maychang

I have to say: this method of learning without even reading the datasheet is really a method of getting half the result with twice the effort. It is recommended to at least read the datasheet in full several times first, and read it backwards and forwards.

EEW2018

maychang posted on 2019-9-27 13:52 "What is the output voltage and output resistance?" What is the output voltage of the P0 port? Don't you even read the datasheet...

Thank you very much. Could you please provide the download link of this DATASHEET?

EEW2018

maychang posted on 2019-9-27 13:57 I have to say: this learning method without even reading the datasheet is really a method of getting twice the result with half the effort. It is recommended to at least read the datasheet several times in full first, and...

Thank you very much. What should I do if I don't understand the professional terms in DATASHEET, especially the abbreviations, and have no idea what they mean?

maychang

EEW2018 posted on 2019-9-27 14:26 Thank you very much. I don’t understand the professional terms in DATASHEET, especially the abbreviations. I don’t understand what they mean at all. What can I do?

89C51.pdf (143 KB, downloads: 3)

89c52.pdf (356 KB, downloads: 2)

AT89S51.pdf (202 KB, downloads: 1)

AT89S2051 4051.pdf (981.43 KB, downloads: 1)

Note: There are also some errors in these datasheets, which must be read together with the corrections.

AT89S2051 4051Err.pdf (56.45 KB, downloads: 2)

maychang

EEW2018 posted on 2019-9-27 14:26 Thank you very much. I don’t understand the professional terms in DATASHEET, especially the abbreviations. I don’t understand what they mean at all. What can I do?

What should I do if I don’t understand the professional terms in DATASHEET, especially the abbreviations, and have no idea what they mean?

There seems to be no other way except to learn English well. In fact, there is not much content, only a few professional terms, which is much easier than English newspapers and magazines.

EEW2018

maychang posted on 2019-9-27 14:47 Note: There are also some errors in these datasheets, which must be connected...

Thank you very much.

EEW2018

maychang posted on 2019-9-27 14:47 Note: There are also some errors in these datasheets, which must be connected...

I am grateful. Is there a Chinese PDF file corresponding to these files so that I can learn from them? Thank you very much again.

maychang

EEW2018 posted on 2019-9-27 15:55 I feel grateful. Is there a Chinese PDF file corresponding to these files so that I can learn from it. Thank you very much again.

"Is there a Chinese PDF file corresponding to these files so I can learn from them?"

Sorry! There is no Chinese manual for 51 MCU.

曹伟1993

EEW2018 posted on 2019-9-27 15:55 I feel grateful. Is there a Chinese PDF file corresponding to these files so that I can learn from it. Thank you very much again.

The datasheets are all in English. The Chinese ones are translated by others and may not be accurate. There may be translation errors.

maychang

EEW2018 posted on 2019-9-27 15:55 I feel grateful. Is there a Chinese PDF file corresponding to these files so that I can learn from it. Thank you very much again.

8051微控制器.pdf (29.33 MB, downloads: 19)

MCS-51系列单片机实用接口技术.pdf (11.46 MB, downloads: 12)

There are quite a few Chinese books about MCS51 series microcontrollers. You can refer to these two books.

曹伟1993

What is the external output resistor? I don't understand what you are asking first.

曹伟1993

What is the external output resistor? Are you wondering what is the maximum current that this pin can output?

led2015

There are indeed problems with many materials nowadays. Most of them are in English. Translators need to have a good command of English, otherwise the translated words may have multiple meanings.

zxdzxd38378

Read the datasheet several times and read it thoroughly

What are the working modes of the P0.0 pin of the 51 single-chip microcomputer? What is its input or output resistance in these working modes? [Copy link]

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There seems to be no other way except to learn English well. In fact, there is not much content, only a few professional terms, which is much easier than English newspapers and magazines.