Questions tagged [buffering]

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How are these Data Buffering Methods same or different from each other?

I am trying to understand the operation of a Serial Bus protocol converter chip. It connects with the serial bus on one side and on the other side it provides its data on the MCU host interface. ...
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1answer
81 views

Interfacing a microcontroller digital IO

I'm working with some microcontrollers, and I'm quite confused about how to interface the digital I/O. I've already see some projects with opto-couplers on outputs, other ones with buffers, so I'm ...
5
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1answer
1k views

When do you need buffers/drivers on buses in a microprocessor design?

I was browsing Microprocessor Interfacing Techniques and found this pharagraph: The microprocessor's buses must connect to every memory and peripheral input-output chip in a system. All MOS ...
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2answers
4k views

How to configure DMA to receive variable length USART messages?

I am trying to receive USART messages on a microcontroller originating from PC which will command it to execute certain tests. I am using STM32F4, I chose to use DMA as messages on the same USART ...
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0answers
70 views

Double buffering on LPC1768?

I am trying to build an MP3 Player on a generic lpc1768 development board. I am trying to play 8bit 44.1Khz wav file using internal DAC. I am using elm chan FATfs and double buffering concept. I have ...
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1answer
656 views

Opamp Buffer output voltage offset

I am building a system which will measure and record the voltage of batteries. There are 8 channels in the system with each channel being capable of measuring 0-35V. The accuracy we have decided upon ...
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1answer
49 views

Do some microcontrollers require data to be loaded in temporary memory before programming?

When I programmed the AT89Cx051 series of microcontrollers, I didn't have to use special memory to program the data, but now even though I'm following the instructions in the datasheet (found from ...
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4answers
222 views

How can I modify this circuit for some hysteresis and better design?

I need to make a circuit even when the push button pushed and released very fast, the final output will stay ON at 12V for roughly a second. %10 accuracy for the timing is fine. An LED will indicate ...
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1answer
50 views

splitter design

I want to split the signal from my electric guitar to 6 amplifiers. Does this splitter design look legit? I want to use 6 fet op amp followers to do it. R2 - R7 are 47R to prevent oscillations (they'...
5
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3answers
604 views

Why do MCUs typically have so little buffering on the USARTSs?

I am currently working with Atmel AT91SAM7X256. It has a CAN i/f with multiple multibyte message boxes. However, the USARTs only have a single byte of buffering, which is a bit of a pain when I'm ...
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1answer
62 views

How video page flipping works

I'm working with Page Flipping and Tiled Rendering (all hardware based) but i cannot understand one aspect of page flipping technique. When you're at frame 1, you're rendering bank1 and working on ...
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1answer
62 views

A question about buffering and filtering a sensor output

I'm going to use a DC outputting 10k windvane and the manufacturer recommends it to use it with a buffer with some additional resistors. This is the paper where they recommend how to condition the ...
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1answer
669 views

VGA double buffer with block RAM

I am planning a low key game console for my own leisure, based on the VGA signal. I have implemented parts of it on breadboards with lots of wires, but it is very error prone, thus my move to the FPGA ...
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1answer
207 views

Read a common digital output from multiple digital inputs

I'd like to read a single digital output with two separate systems, each of which has a digital input. Both systems have a common ground. In principle, since the digital output is low-impedance and ...
2
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1answer
537 views

Opamp: capacitive loading when buffering a Reference

I need to drive a ratiometric current sensor ACS758xCB with a nominal supply current of 10mA. Due to the ratiometric nature of the sensor I would prefer to supply it from the reference voltage of my ...