After designing a set of circuit boards, you need to buy components. Where do you usually buy them? Online or at the local electronics market? Farnell, Arrow or other companies? What do you think?
I used an active crystal array.It is the kind powered by 5V. Theoutput is TTL level.But I connected a NOT gate below it.But there is no output.Is it because the driving ability is not strong enough?Ho
I have 6 years of experience in PCB LAYOUT in Japanese companies, 2-10 layers of substrate design experience, rich experience in EMC, SI, EMI, ESD, PI design, and now I am looking for a part-time PCB
My understanding is that P1.0 can both input and output, while P1 can only output. . . . . I have only been learning microcontrollers for less than 15 days. . . My understanding may be superficial. .
ACTIVATEMMU ; The 1st Level Section Descriptors are setup. Initialize the MMU and turn it on. ; mov r1, #1 mcr p15, 0, r1, c3, c0, 0 ; Set up access to domain 0. mov r0, #0 ; ********I PLUS mcr p15, 0