Search:

Type: Posts; User: bremenpl

Page 1 of 3 1 2 3

Search: Search took 0.04 seconds.

  1. Replies
    10
    Views
    882

    Closed: Re: Initial value depending on the input

    I see... But the problem here is that the mentioned reset signal is probably a signal entering the component. This design would require a physical reset to be performed a startup, this is not...
  2. Replies
    10
    Views
    882

    Closed: Re: Initial value depending on the input

    This is just an example. In the if statement part I had another statement that sets the counter variable, depending on the input signal. That did not work as well. How else can I create a 1 time...
  3. Replies
    10
    Views
    882

    Closed: Re: Initial value depending on the input

    You are right, but the thing is to make the input being read only once. Please take a look at this MWE:


    --! Debounce hysteresis mechanism implementation
    architecture arch_debounce of...
  4. Replies
    10
    Views
    882

    Closed: Re: Initial value depending on the input

    Hello, thank you for answer.



    I tried doing just that- it did not help as well. I think in my situation (MachXO2 from Lattice) it is somewhat not possible to initialize the values this way. For...
  5. Replies
    10
    Views
    882

    Closed: Initial value depending on the input

    Hello there,
    I am designing a simple debounce mechanism in VHDL. I have the following problem. An internal counter (a variable) should be initially set to 0 or some value (ie. 100), depending on...
  6. Replies
    6
    Views
    2,530

    Closed: Re: 50 Ohm inmpedance matching for 4 layers PCB

    I was planning to use both internal planes for GND and use stitching on whole board with additional vias around the antenna NET.
  7. Replies
    6
    Views
    2,530

    Closed: Re: 50 Ohm inmpedance matching for 4 layers PCB

    Thank you for answer,
    That is something I was exacly wondering about, and even thought of it. I started doubting it, because the impedance I obtained from AppCad differed a lot from 50R when used...
  8. Replies
    6
    Views
    2,530

    Closed: 50 Ohm inmpedance matching for 4 layers PCB

    Hello there,
    I have a question regarding calculating track width and gaps on the side for 4 layer PCB board, in order to maintain 50 ohm impedance for it. The term I have come across for calling...
  9. Replies
    1
    Views
    1,996

    Closed: LTE vs 3G power cost at low speed

    I am currently working on a device in which I need to implement internet connection. For that I intend to use a GSM module, for example this one: SIM5320. This is a 3G module. I have been reading...
  10. Replies
    2
    Views
    1,383

    Closed: Re: Most comprehensive guide to Eagle

    Thank you for the answer.
    But before I jump into scripting and all, I need to figue out how to do basic tasts fast ie. Schematics, schematic DRC, PCB, PCB DRC and rules, component creation (Also...
  11. Replies
    2
    Views
    1,383

    Closed: Most comprehensive guide to Eagle

    Hello there,
    I am a long time Altium Designer user. Now I have to swap to Eagle for various reasons... I was looking for an advice on getting the most complete step by step guide on the usage of...
  12. Replies
    6
    Views
    1,140

    Closed: Re: SST26VF032B operation problem

    I can post the code, it is not a problem. The thing is some of the commands work, so I am assuming the code works and I am doing something wrong with the configuration.

    This is the function that...
  13. Replies
    6
    Views
    1,140

    Closed: Re: SST26VF032B operation problem

    I use my own code. I have only found the topic with your code and verified that I do everything correctly.
    In my situation the SST26VF032B chip doesnt output anything on MISO line after asking him...
  14. Replies
    6
    Views
    1,140

    Closed: Re: SST26VF032B operation problem

    The topic is about something else really, I just wanted to point out that the configuration is alright. My problem is that The only instructions that work for me are the Identification instructions....
  15. Replies
    6
    Views
    1,140

    Closed: SST26VF032B operation problem

    Hello there,
    I am writing a library at the moment to interface my STM32 mcu with SST26VF032B memory. I have a problem that I cannot solve for over 2 days now...
    I am talking to the chip using...
  16. Replies
    1
    Views
    2,634

    Closed: A modern alternative to ModBus RTU

    Hello there,
    On a university we are working on a project at the moment where RS485 communication is involved. We are designing everything from scratch so we can choose any protocol for the RS485...
  17. Replies
    6
    Views
    814

    Closed: Re: The least crystal freq the better?

    Thank you for answer. I was thinking more of a following situation. Sometimes (nearly always from my experience) ICs have the most passive components required on the same side of the chip as the osc...
  18. Replies
    6
    Views
    814

    Closed: Re: The least crystal freq the better?

    What I was wondering more about is something like this: Lets say I need 16 Mhz clock. Whats more "stable"? 8 MHz crystal + PLL x2, or 4 Mhz crystal + PLL x4?
  19. Replies
    6
    Views
    814

    Closed: The least crystal freq the better?

    Hello there,
    I have a question regarding crystal oscillators used to clock various MCUs. In general, the higher the signal frequency is, the better PCB enviroment one has to provide for proper...
  20. Replies
    3
    Views
    647

    Closed: Re: Differential line terminator power

    Does that mean that the outputs work as current sources? How to understand this?
    Edit: Ah, its because output levels are not 5V - 0V, but 3.4V - 0.2V.
  21. Replies
    3
    Views
    647

    Closed: Differential line terminator power

    Hello there,
    I have a question regarding differential line resistor power in quadrature encoders applications.

    133276

    Assuming RT is 120R and VCC of IC's is 5V, my understanding is that (with...
  22. Replies
    10
    Views
    663

    Closed: Re: Peculiar USB PD line connection

    Thank you Klaus. SO If I understand correctly, I should enable the resistor only after my USB code was initialized, wait for the connection, and the disconnect it not to interfere the USB lines? How...
  23. Replies
    10
    Views
    663

    Closed: Re: Peculiar USB PD line connection

    Frequency is set to 48 Mhz in the code, also I am using a logger- It doesnt see any event at all :(.
  24. Replies
    10
    Views
    663

    Closed: Re: Peculiar USB PD line connection

    So If you are saying that you connect directly, does that mean that this resistor can be left there for the whole time and it wont affect the USB functionality? Because now my PC discovers the USB...
  25. Replies
    10
    Views
    663

    Closed: Re: Peculiar USB PD line connection

    This just sums up whole day of my work... In STM32F4 there is no such connection, also I didnt find anywhere in the datasheet that one needs this resistor... Thank you.
Results 1 to 25 of 62
Page 1 of 3 1 2 3