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  1. V

    real time operating system

    operating system that provide interface between hardware and application software operating system - windows Linux Example - we use operating system for computer - we use operating system for mobile 1) does ATM machine use operating system ? please give other example where we used...
  2. V

    Raspberry Pi

    Raspberry Pi is like small computer, . Raspberry pi can communicate with pc application via TCP/IP. that receive command from pc via Internet. it mean we can control any device via Raspberry what can we do with Raspberry Pi.? can we control robot via Raspberry Pi?
  3. V

    cmos inverter

    I want to know how cmos designer decide what specification is need to make good cmos Inverter so I Think 1)It should be dissipate less power 2)should have noise immunity 3)rise time and fall time should be less how to select another specification for cmos inverter ?
  4. V

    Assembly code for arm

    Area example , code readonly entry start mov R0, #5 ; load value into R0 mov R1,#3 ; load value into R1 add R0, R0,R1 stop B stop ; I don't what is this End why does we use this line Area example , code readonly
  5. V

    Assembly code for arm

    I am beginner for arm I just want to learn assembly for arm keil software I have written code for addition Area example , code readonly entry start mov R0 #5 mov R1#3 add R0, R0,R1 stop B stop End I am seeing 7 error massage assembling lcd.asm... lcd.asm(1): error A9: SYNTAX ERROR...
  6. V

    cmos inverter

    what should be good characteristic for cmos circuit 1)It should be dissipate less power 2)should have noise immunity 3)rise time and fall time should be less does anyone know another specification ?
  7. V

    fetching and executing instruction?

    I am feeling I have to stop this thread here I have tired I tried lots but could not got the correct answer. i will never post about related this topic on this forum
  8. V

    fetching and executing instruction?

    yes you are correct, I want to design micro controller. so I need to know how does microcontroller work (hardware) . I am searching on google, I am reading datasheet I am confuse lot, I don't understand how the part of conreoller like RAM, ROm , processor work step by step. I want...
  9. V

    fetching and executing instruction?

    I am not sure but Think signal from the switch (input) goes input port which is addressed any other memory location in Ram memory program in rom memory tell the processor to look at location and if the switch is open 0000 the location will hold 0000 data and If switch is closed 0001 location...
  10. V

    fetching and executing instruction?

    I agree, you can't explain whole things and I don't want to someone explain whole things but can you give hint its lots for me I have many doubts, but at this time the main doubt I have that signal from the input device(switch) goes into the input port Q. 1 how does processor know that...
  11. V

    fetching and executing instruction?

    micro controller contain mainly ALU, control unit ROM , RAM, PORT Processor take information from ROM, RAM, Input port fetching - decoder take command from rom memory decode - decoder decode instruction and tell the cpu what to do like add, sub execution- alu do the operation like...
  12. V

    how processor understand assembly command from memory??

    ok I will search on google but just tell me when we take input from sensor or switch, where is signal goes?
  13. V

    how processor understand assembly command from memory??

    look at this in another way l I have micro controller 89c51 ,LED,switch,compiler(keil),programmer (flesh magic) SWITCH is input device connected port pin P0.1 LED is output device connected port pin P1.1 I have written assembly code in keil software for example assembler convert this code into...
  14. V

    how processor understand assembly command from memory??

    lets think I have micro controller 89c51 ,LED,switch,compiler(keil),programmer (flesh magic) SWITCH is input device connected port pin P0.1 LED is output device connected port pin P1.1 I have written assembly code in keil software ORG OH ON: SETB P1.1 ; LED IS ON OFF: CLRB P1.1 ; LED IS...
  15. V

    Instruction set need help

    I have question how to design Instruction set (just for paper work) I chose 8 bit instruction with 8 instruction 4 for arithmetic operations and 4 for logic operation 1)what should be operand and opcode ? 2)what should I know before to design ?
  16. V

    what is address bus and instruction bit in 8051

    Data bus is electrical path that connect cpu , memory and other device data bus= electrical path data bits = number of wires in electrical path each wire can transfer 1 bit at time we can say 8 bit data bus means 8 wire of 8 bit at time address bus- If the address bus is 8 bit It can be...
  17. V

    what is address bus and instruction bit in 8051

    I always confused actually what is 8 bit address bus and instruction . bus is wire or cable that is used to carry the signal following is confused term for me 1) address bit and instruction bit is same or different things? 2)data bus - if the data is 8 bit and 8bit address it means it can be...
  18. V

    cadence tool?

    I want to design and Implement micro controller on FPGA . can I do with cadence Tool?
  19. V

    cadence tool?

    I use cadence at school, which is very expensive It can be used only on school computer. I am looking for open source cadence tool. Is there any free cadence tool ?
  20. V

    micro controller design

    I don't understand selection about instruction decoder we can use 5 bit , 9bit , or 13 bit so why we use 8 bit decoder. can you tell me the specific reason?
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