All Questions
Tagged with memory addressing
36
questions
9
votes
2
answers
617
views
What is the theoretical maximum capacity of 72-pin RAM modules?
I'm asking, because the information on Wikipedia is extremely lackluster, perhaps even incorrect.
This is my current understanding:
A 72-pin module has 12 address pins, 4 CAS, and 4 RAS pins. (For ...
- 1,097
3
votes
1
answer
82
views
Memory Capacity and Memory Addresses
According to this site, in Table2, HBM(HBM2e) has a capacity of 8Gb = 2^33 bits per channel. Here, it has a 24-bit address consisting of 4 bits from the Bank address BA[3:0], 15 bits from the Row ...
- 33
0
votes
1
answer
90
views
How to debug modbus rtu address space problems? [closed]
I have an "Ewon Flexy server" and an "IMO SD1 Inverter" connected via Modbus RTU RS485.
I can change some of the parameters with Flexy interface and observe the change in the ...
- 188
0
votes
0
answers
107
views
What is the difference between Content Memory Addressing (CMA) and Content Addressable Memory (CAM)?
I have been looking over the internet for Content Memory Addressing(CMA) but whenever I search for it I get Content Addressable Memory (CAM). So I am confused, is CMA and CAM the same thing. If ...
- 101
0
votes
1
answer
257
views
Specifying the address range of each memory block
Four 16x4bit blocks are interconnected to form a 64-bit memory as shown below
First of all why is a block here called 16x4bit ; 4 bits are related to the input gates but what's with 16 here ?
I also ...
- 227
0
votes
1
answer
193
views
Can a memory chip have a certain starting address
In my book there is a question stated:
Can a memory chip of capacity 512 KB have the starting address
2B0000h?
To me this seems like an incomplete question with a wrong answer in the book. The ...
- 23
0
votes
2
answers
1k
views
Memory-mapped IO vs Port-mapped IO in microcontrollers
I've been reading about external peripheral mapping to microcontrollers.
I understand that memory-mapped IO means that the same address space in the microcontroller can be used for internal memory ...
- 161
0
votes
1
answer
293
views
Address decoding different bank sizes in 64K memory
I'm doing a small Motorola 6809-based computer project, and since I'm a bit rusty when it comes to boolean algebra I'm wondering if I'm doing my address decoding a bit too complicated for my simple ...
- 197
1
vote
2
answers
809
views
Does pin A15 on a Z80 tell if the CPU is addressing ROM or RAM?
I am designing a simple, hobbyist single board computer similar to an Arduino using a Z80 CPU. The trouble I am running into is how the CPU addresses memory. I know that the Z80 uses pins A0-A15 to ...
- 113
-5
votes
1
answer
699
views
Design logic circuit to address 2 x 512 kB RAM and 2x1024 MB RAM with 36 address lines? [closed]
How do you address 2 x 512 kB RAM and 2 x 1024 MB RAM with 40 address lines?
Memory is byte addressable, problem is to find out enough address lines to address all 4RAM and designing appropriate ...
- 91
1
vote
1
answer
117
views
Relate Bin file (read from uC) to map file
We have a AT32UC3C1512 presenting a Failure, part of the analysis that is normally performed to isolate the failure is to perform ABA swap of components, we have performed the swap in several ...
- 67
3
votes
2
answers
4k
views
Arm mode and Thumb mode makes the PC's bit 0
The ARM and Thumb modes are word-aligned and halfword-aligned. I understand this means that if it's in ARM mode, the start of addresses must be divisible by 32, and if it's in Thumb mode it has to be ...
- 145
0
votes
1
answer
88
views
Choose "safe" section of DDR memory in ZC702 board
I can not fully understand what section of the available external memory is safe to assign for a VDMA on the ZC702 board. I need to dedicate 4MB of memory for the three frames (640*480* 4bytes * 3 ...
- 3,192
0
votes
2
answers
771
views
Is this address decoding circuit correct?
The problem is to design an address decoding circuit for two 4Kx8 RAM chips at the 2050H . We have 16 address lines. So, for 4Kx8 RAM we need 12 address lines to address the memory. Remaining can be ...
-1
votes
1
answer
374
views
A computer system has RAM of 32K bytes and 64 peripherals. What is the number of distinct addresses required? [closed]
Is it correct to assume that the number of addresses for 32k of ram is 2^15 addresses? Then for the peripherals is it 2^6 addresses?
- 53