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Questions tagged [clockrates]

13 questions
27
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CPU Emulation and locking to a specific clock speed

If you had read my other question, you'll know I've spent this weekend putting together a 6502 CPU emulator as a programming exercise. The CPU emulator is mostly complete, and seems to be fairly accurate from my limited testing, however it is…
FlySwat
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How do I set GPU core and memory clock programmatically on Windows?

Is there some API/library for this? I have an ATI Radeon 9000 Series graphics card and I need to lower its core/memory clock on Windows startup (I thought of making a small service for this but I never did this before). I know it's possible (because…
szx
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ARM LPC1768 UART0 configuration, wrong baud rate

My baud rate should be 115200, but it is 892.9 void UART0_Init(int pclk, int baudrate) { unsigned long int DLest; //unsigned long int pclk; unsigned int temp; // Turn on power to UART0 SC->PCONP |= PCUART0_POWERON; // Set…
michael
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Crystal core MPU Clock rate differences

I have a embedded system which on boot up shows as below: Clocking rate (Crystal/Core/MPU): 12.0/400/1000 MHz Can anybody explain me on differences between these three clock rate. Processor is ARMv7, OMAP3xxx
Ashoka K
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Drive an DAC from a stream that is clocked from another source?

My DAC is internally clocked at 48khz, I need to feed it from a stream that is also 48khz but is clocked from a different source. The two sources will drift over time and any buffering in between will inevitably overflow or underflow. Unfortunately,…
JeffV
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How to program intel hd graphics gpu clock rate?

I found a tool (Intel Extreme Tuning Utility, os win 7 ulti x64) what I can use to change the gpu clock on my laptop (cpu type Intel Core i5-4210U, built in Intel HD Graphics 4400). I marked the slider (belongs to that function) with red on this…
cocox
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Is Increment Speed Affected By Clock Rate

Consider the loop below. This is a simplified example of a problem I am trying to solve. I want to limit the number of times doSomething function is called in each second. Since the loop works very fast, I thought I could use a rate limiter. Let's…
Can Bayar
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Can increment of a register be used to determine the clock rate?

Can increment of a register (in a loop) be used to determine the (effective) clock rate? I've naturally assumed it can, but I was commented that Cpu's may implant Super-scalar techniques that make this kind of computation useless. Also I was told…
Liran Orevi
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How to find second-by-second clock speed Mac

I would like to know the second-by-second cpu frequency on my Mac. I have a feeling it likes to idle at very low clock speeds and then under demand jumps up to a higher clock rate. (I have UI frame rate evidence that suggests this) My Mac is the…
Jeff Hykin
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Instructions per sec for Operating systems

I am new to Computer Architecture and Design. My question was a high level program Instruction set are executed in CPU one after another. Does it even involve Operating System instructions as overhead when executing these instructions ?. For…
Carbonizer
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Why RTP's timestamp for video payload use a 90 kHz clock rate?

I find that many RFCs said that: A 90 kHz clock rate MUST be used. But I don't get the root reason for this.
Xiaofeng
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In terms of instructions processed by the CPU what does the clock rate determine?

There seems to be a gap in my understanding between the CPU processing instructions and the frequency at which the quartz crystal oscillates. How exactly does the frequency of a CPU affect the speed at which a program is run? Is there a relation…
Celeritas
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Optimization of continuous assignment by mixing combinational and behavioral logics?

I am trying to wrap my head around a mix of combinational and behavioral logic. I've got small FPGA with 4 LEDs and a 66 MHz clock input. The idea was to make two of them glowing (one rising, one falling) and another two blinking. So I came up with…
user405725