All Questions
25
questions
0
votes
1
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159
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How to understand Register Address, Bits, and Reset value of an electronic component?
Source: Page 31 ADXL355 MEMS' Datasheet.
Source: Page 32 ADXL355 MEMS' Datasheet
The above is some of ADXL355 Accelerometer Register map table. From that table, in the RESET column, there are their ...
- 291
3
votes
1
answer
238
views
How can I improve this RAM implementation in VHDL?
I'm practicing for a lab exam and I'm trying to solve one from past years. I feel like I'm doing something wrong because I don't have much experience with VHDL.
Exam question
Write the VHDL code for ...
- 33
-1
votes
2
answers
94
views
Bistable memory cell with paired buffers instead of paired inverters
Bistable memory cells with paired inverters are very standard and basic building blocks (was used in Intel 8086 for example. ) But why not use paired buffers instead?
- 461
0
votes
1
answer
1k
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How do computer memories interact with each other (registers, cache, RAM, ROM)?
After Googling around for some time, I have managed to get a good understanding what makes these components different, but I've yet to find any clear computer architecture-focused article/thread on ...
- 103
1
vote
2
answers
971
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STM32 bare-metal programming - Memory addressing in 32-bit system - memory offset
I am coming from a mechanical background and some Atmega experience, now doing some bare-metal programming courses on ARM processors. So far it is looking great, digging into documentation about uC ...
- 47
0
votes
2
answers
147
views
How many times can a register bit be changed in AVR?
I am writing a program for an ATmega328P.
I have a while loop inside which I am enabling the UART receiver complete interrupt flag using the command ...
- 203
0
votes
1
answer
76
views
Shared rising edge detector? [closed]
Why do we have a rising edge detector in every flip flop of a register. Can't we just make a shared one for all the flip flops in order to save hardware?
- 11
0
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0
answers
34
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How do I read the value of registers in Logism?
I am designing a CPU in logism. One of the components of the CPU is a register circuit (RegFile), which stores the registers data. The register circuit (RegFile) is shown below:
I am able to write ...
- 113
1
vote
0
answers
22
views
Recover correct value from unstable memory through read operation
We are given a memory with 32-bit width for each word. it has the length (N - number of rows) which is not relevant for the question. we know that the memory has a problem where at any row, one bit ...
- 1,067
0
votes
2
answers
327
views
The CPU has registers, but doesn't the RAM have registers too?
At low-level, registers are the same as a bunch of flip-flops connected by the same clock, so I would think RAM is made of registers.
I've been reading, though, that registers are only in the cpu, ...
- 113
0
votes
1
answer
154
views
Decoder inputs needed given 32 registers
I have a couple of questions about decoders. My first is this:
If I have a register bank with 32 registers, how many inputs are needed for the decoder and why? I think that you need 5 inputs for this ...
- 103
3
votes
1
answer
442
views
Are Tri-state buffers even necessary?
I'm trying to make a 1-bit computer, and I'm stuck on the registers. I think I am going to have 2 of them, and I want a way to separate their outputs. Let me explain. Let's say Register A has a 0, and ...
- 390
1
vote
1
answer
593
views
Assembly language, accessing bytes of memory
I have some memory address 0x00000100 that I want to read from. The lower 4 bits read from this address indicates the states of 4 buttons - So bit 0 shows the state of button 0, bit 1 shows the state ...
- 23
5
votes
8
answers
3k
views
What prevents the construction of a CPU with all necessary memory represented in registers? [duplicate]
Modern CPUs employ a hierarchy of memory technologies. Registers, built into the chip have the lowest access times, but are expensive and volatile. Cache is a middle-man between RAM and registers to ...
user173317
0
votes
2
answers
292
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Are memory-mapped registers actually implemented as real registers?
I am currently trying to better understand microcontroller-architectures and I am particularly studying the ARM cortex-m3 right now. What I have always wondered is, if memory mapped registers are ...
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