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What is the difference between a CPU register and the rest of volatile memory on AVR?
awneil wrote:Again, the SFRs are different - they are not "memory"   Right, i'm just asking if the IO registers are the same type as the 32 GPRs (as neither GRPs nor the...
Thursday, 13 January 2022 - 15:23
What is the difference between a CPU register and the rest of volatile memory on AVR?
Need to ask one more question on this topic;   In AVR are the 32 CPU registers mainly used for arithmetic work and the rest of IO registers (SFRs) essentially the same type?...
Thursday, 13 January 2022 - 15:05
What is the difference between a CPU register and the rest of volatile memory on AVR?
westfw wrote:Correct.    So similar to Arm then. Registers are memory mapped, they are actual registers and not part of the SRAM (RAM) itself.
Thursday, 13 January 2022 - 03:24
What is the difference between a CPU register and the rest of volatile memory on AVR?
It doesn't matter of course,   I was under the impression that (based on the above SO link) memory mapped registers are actual registers which happen to have a memory address...
Thursday, 13 January 2022 - 01:28
What is the difference between a CPU register and the rest of volatile memory on AVR?
@awneil   From this SO post about Arm I understood that a "memory mapped" register doesn't mean it's a register connected to memory and that memory address just acts as a...
Thursday, 13 January 2022 - 00:43
never mind
But this applies to a large number of embedded devices including Atmel. How would the same question apply to an Arm based MCU with Atmel?
Wednesday, 29 December 2021 - 20:53
How does UART transfer data out of the TX pins?
Thanks for all the help. 
Wednesday, 3 February 2021 - 14:06
How does UART transfer data out of the TX pins?
I see, so when UDR is empty an interrupt occurs. Processor halts current execution and jumps to the interrupt handler which basically puts "_tx_buffer" into the UDR...
Monday, 1 February 2021 - 16:04
Do we need a driver to talk to atmega328p from a PC
Kartman wrote:What does CISC have to do with any of this? There is a line where software ends and hardware starts. That line could be when instructions getting decoded in CPU, or...
Saturday, 11 July 2020 - 14:47
Do we need a driver to talk to atmega328p from a PC
Brian Fairchild wrote:Have you read the Web page I linked to about 20 posts ago? Yes I was familiar with OSI from networking. But it's too theoretical. I was looking for a...
Saturday, 11 July 2020 - 13:26
Do we need a driver to talk to atmega328p from a PC
js wrote:No, you should be at a university or college doing electronics and programming! I could have been to them, don't assume things, you don't know me. electronics and...
Saturday, 11 July 2020 - 03:04
Do we need a driver to talk to atmega328p from a PC
ki0bk wrote:Yes Thank you so much.
Friday, 10 July 2020 - 19:54

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