About Lyu.1

Lyu.1 · 2024-12-19

Master: I've been learning stm32mp157 recently, and I've encountered some problems with less detailed attribute descriptions in the yaml documentation of mp157 in the linux directory, and I want to understand their usage clearly. For example, the cl...

Lyu.1 · 2024-09-25

Master:Platform: stm32G070cbQuesion:The MCU pin is driven through a 100R resistor to drive an N-channel MOS transistor (2N7002, Ciss < 50pF).When the pin is given a high output, the starting transient current peak approximates I = 3.3V / 100R = 33mA,...

Lyu.1 · 2024-08-19

Hi,Master:platform: STM32G070CBQuesion: Regarding CMOS - and TTL compliant, the manual provides the above diagram. How does it achieve compatibility? When Vin>min (07 x VDDIO, 2), is it considered that the input is at a high level? When Vin<min...

Lyu.1 · 2024-08-16

Hi,Master:platform: STM32G070CBphenomenon:When the MCU is empty (without any program), connect an external pull-up resistor 10K to the adjustable voltage source on the PA4 pin, adjust the voltage in the range of 4~18V, and find that the maximum clamp...

Lyu.1 · 2024-03-28

Hi,Master:platform: STM32G070CBkeil ide: arm Compiler:version 5 (c99 mode)Question: #pragma pack(8) typedef struct{ uint32_t a; uint8_t b; uint32_t c; uint32_t d; uint32_t e; } x_t; #pragma pack() x_t a[10] = {0}; int sz = siz...

Lyu.1 · 2024-09-26

Thank you for your answer, very beneficial.

Lyu.1 · 2024-09-26

Thank you for your answer."For short transient x3-5 times overload is o'k." Is there any documentation for this? Or a potential default design？

Lyu.1 · 2024-09-25

Ok, thank you very much for the suggestion.

Lyu.1 · 2024-09-06

Master,I'm sorry, Please allow me to ask one more question: The red line indicates that it may not be able to work properly for a long time at the maximum rating? If so, if it only exceeds a certain standard value and is less than the maximum ra...

Lyu.1 · 2024-08-19

Ok, I see, thank you very much！

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The device tree documentation is not detailed

GPIO pin transient load current capacity

CMOS- and TTL-compliant

Voltage withstand of MCU pins

Pack alignment exception issue

Re: GPIO pin transient load current capacity

Re: GPIO pin transient load current capacity

Re: Voltage withstand of MCU pins

Re: Voltage withstand of MCU pins

Re: CMOS- and TTL-compliant