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Recent content by electroboy

  1. E

    advantage of arm architecture

    Can you please give me a link or pdf which gives the advantage of ARM architecture in a DETAILED manner ? I already have the reference manual but it is not sufficient for me... Thanks in advance.
  2. E

    Rs232 communication in vb6 for sending a byte to the microcontroller

    if u could use vb2010, try this Private mySerialPort As New SerialPort Dim var(4) As Byte={&HDE, &H80, &H12, &H34} With mySerialPort .PortName = "COM9" .BaudRate = 9600 .DataBits = 8 .Parity = Parity.None .StopBits = StopBits.One...
  3. E

    port 2 of 8051.. which is true?

    the following are the structures of port 2 in 8051 .. one is from the manual the other is from a reliable website **broken link removed** which is correct? if i take the manual to be correct, then because of the AND gate when the control is zero( either for address or i/o), the internal...
  4. E

    duality of port 2 of 8051

    yes thank you... but what makes me to be still in confusion is that it is the lNTEL's manual that shows the presence of AND gate in port 2. Can u please clarify?
  5. E

    duality of port 2 of 8051

    thank you ud23... i saw the same website. we can see the difference in the following picture.. the AND gate which is in the manual is missing here... this creates a great difference in the operation of port. please clear my doubt.
  6. E

    duality of port 2 of 8051

    hi... it is said that port 2 of 8051 has internal pull up in both functions (i.e when used as i/o or higher order address). but according to the figure given in manual, it is not possible for port 2 to have internal pull ups in both functions. the control should be zero either during i/o...
  7. E

    PWM in timer 1 of atmega8

    thanks... they are great..
  8. E

    PWM in timer 1 of atmega8

    i read the manual for pwm generation in timer1 of atmega8... but i cant quite understand.. can anybody please give me links where i can nicely understand pwm modes (ctc, fast pwm, phase correct, phase and freq correct ) ?
  9. E

    status register in atmega8

    doubt cleared.. thanks...
  10. E

    status register in atmega8

    please me what is the function and use of V, S, N flags in SREG in ATmega8..... when they are set/cleared e.t.c ?... thanks in advance.... why sign bit when negative flag is there ??
  11. E

    ATmega8 8-bit timer0 with external clock source

    thank you.. how do we say "Tn will be available to the edge detector after between approximately one half and one clkIO cycle time" ? ... the question may be silly.. pls help
  12. E

    ATmega8 8-bit timer0 with external clock source

    thank you skogsjanne ... i really need to understand it... i tried to draw the timing diagram but i am not getting it properly since a level and edge triggered latch are connected together... can u please show me the timing diagram ?
  13. E

    ATmega8 8-bit timer0 with external clock source

    i cant understand the working of the following circuit.. it is said that "The edge detector generates one clkT1/clkT0 pulse for each positive (CSn2:0 = 7) or negative (CSn2:0 = 6) edge it detects.".. please say me how it works... thanks in advance..
  14. E

    atmega8 io pins internal configuration

    the following is the internal schematic of port pin of atmega8 ... please explain me why we use a capacitor here... thanks in advance..
  15. E

    problem with 16x2 lcd

    i am using at89c51 controller. i am receiving data serially from my computer with visual basic and sending it to lcd. The program identifies each key (alphabet) pressed and displays it in lcd. i am using a key(HOME) to make the cursor in lcd to go to the beginning of second line (C0 command)...
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