Now CPU core plate welding SN74LVTH16245ADGGR chip as the bus transceiver, separate test chip on board, the input and output waveform is consistent, but burn into the chip will STM32F207ZG FSMC test procedure for data reading and writing test, the output end of the 74 chip signal waveform is abnormal, figure 1 as the input waveform with 74 chip, the following figure 2 to write output waveform, figure 3 to read the output waveform, bosses, explain genuflect is begged grateful!!!!!!

CodePudding user response:

Scroll painting that is the ideal waveform, see the oscilloscope is contain interference waveforms, to adapt to this kind of difference,

CodePudding user response:

reference 1st floor xuyaqi029 response:

scroll painting that is the ideal waveform, see the oscilloscope is contain interference waveforms, to adapt to this kind of difference,

That I'm the waveform after low level rise will not come, how do you explain? Or how do you explain the waveform?

CodePudding user response:

Explanation of pulse output somewhere to load, high level haven't put enough voltage to charge low level came,

reference

CodePudding user response:

refer to the second floor weixin_43571548 response:

Quote: refer to 1st floor xuyaqi029 response:

Scroll painting that is the ideal waveform, see the oscilloscope is contain interference waveforms, to adapt to this kind of difference,

That I'm the waveform after low level rise will not come, how do you explain? Or how do you explain the waveform?

Explanation of pulse output somewhere to load, high level has not put enough voltage to charge low level came,

CodePudding user response:

reference 4 floor xuyaqi029 response:

Quote: refer to the second floor weixin_43571548 response:

Quote: refer to 1st floor xuyaqi029 response:

Scroll painting that is the ideal waveform, see the oscilloscope is contain interference waveforms, to adapt to this kind of difference,

That I'm the waveform after low level rise will not come, how do you explain? Or how do you explain the waveform?

Explanation of pulse output somewhere to load, high level haven't put enough voltage to charge low level came,

But I really no output load ah, can add a contact number? I private chat you

CodePudding user response:

There is my definition of a global variable M4 plans to use the watch window to observe the original data, using the function is the M4=* ((__IO uint8_t *) 0 x64000007), but why show a value of 0 XFF ', also have to take a single quotation marks? Is the place below the red box, what causes this kind of situation, explain bosses genuflect is begged!

CodePudding user response:

reference 5 floor weixin_43571548 reply:

Quote: refer to 4th floor xuyaqi029 response:

Quote: refer to the second floor weixin_43571548 response:

Quote: refer to 1st floor xuyaqi029 response:

Scroll painting that is the ideal waveform, see the oscilloscope is contain interference waveforms, to adapt to this kind of difference,

That I'm the waveform after low level rise will not come, how do you explain? Or how do you explain the waveform?

Explanation of pulse output somewhere to load, high level haven't put enough voltage to charge low level came,

But I really no output load ah, can add a contact number? I private chat you

Oscilloscope detecting head is your output load, the test head not appropriate will affect the output signal,

reference 5 floor weixin_43571548 reply:

Quote: refer to 4th floor xuyaqi029 response:

Quote: refer to the second floor weixin_43571548 response:

Quote: refer to 1st floor xuyaqi029 response:

Scroll painting that is the ideal waveform, see the oscilloscope is contain interference waveforms, to adapt to this kind of difference,

That I'm the waveform after low level rise will not come, how do you explain? Or how do you explain the waveform?

Explanation of pulse output somewhere to load, high level haven't put enough voltage to charge low level came,

But I really no output load ah, can add a contact number? I private chat you

Oscilloscope detecting head is your output load, the detection head not appropriate will affect the output signal,