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can somebody explain me how port0 of 8051 microcontroller has internal pullups when we access the external memory as it does not have internal pullups during normal operation compared to other ports.
Power pins of 74LS273 are connected on my board. The delay() routine gives 100 us delay but i tried with 1 ms delay routine also but I am facing same problem. Tell me what could be the problem?
The IC 7400 is a NAND gate and the signal Y is the output of NAND gate. When both a15 & a14 are high, then /CS is active. I don't understand what is the problem with this circuit Pls reply me.
I am working on AT89C51 & AT28C16 (eeprom). While interfacing AT89C51 to external EEPROM, I found 2 observations.
1. sometimes /CS is permenantly active i.e. address transition is not taking place but /WR & /RD signals are generated and the data is written properly to the EEPROM as per...
Hai friends,
I am using AT89C51ED2 microcontroller. I would like to store the position information measured by the optical encoder into internal EEPROM of AT89C51ED2. Can anybody help me in writing C code for storing the data in EEPROM.
Hi friends
I am working on PIC microcontroller. I am finding some difficulties in writing program for encoder RPM measurement. I would like to use 2 timers viz. one timer to count the no. of pulses and the other timer to generate a timing interval over which the first timer can count. Can...
Hello friends,
I am working on FPGA's. I would like know when to use FPGA'S and when to use microcontrollers? Tell me the exact differences betwween two in the reliability and other aspects?
Hello friends,
I would like to know how to select different error detection techniques for different applications? When to use CRC check and when to use checksum method?
Hello friends I am working on FPGA. I want to know how to select the FPGA from different vendors i.e. comparision of FPGA's from different vendors. In what way Xilinx FPGA is preferred than other FPGA's? I also wish to know the exact difference s between FPGA and ASIC?
dear friends,
I am working on spartan3E FPGA family (XC3S250E).. I would like to know how to select the decoupling capacitors in PCB design and on what basis the values for capacitors has been chosen? What capacitor values are recommended?
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