Please help me find out which two pins R1 and R2 in this picture correspond to? Is it R1——P3.0 (RXD), R2——P3.1 (TXD)? [img]http://www.dream69.cn/dream69cn/2008921153414969.jpg[/img]...
The program is running in SVC mode, and an IRQ occurs suddenly, what will happen? (1) The CPU will automatically save the CPSR to SPSR_IRQ (2) and then save the PC to R14_IRQ (3) and then force the mo...
I want to ask an expert, I plan to use REF3133 as a reference source to provide 3.3V.
The maximum input is 7V. For this kind of reference source, does the input have to be a certain voltage higher tha...
When using a single-chip microcomputer as a switching power supply, the single-chip microcomputer port is often burned out for no reason. Finally, it was discovered that it seemed to be a problem with...
I connected two identical USB devices to my PC. Usually, the USB port can provide 500ma current, and the power consumption of the devices I connected is less than this value. However, when I connected...
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Dig...[Details]
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