• AT89C51ED2 Reset pin is latched up to high state
    Dear Friend, I am using a 64 pin VQFP AT89C51ED2 which has been mounted on a VQFP to DIP pcb. I observe at power up, the reset pin is latched up to high state. Wiring conditions are :Vcc=5V, Gnd, EA...
  • AT89C51ED2 Reset pin is latched up to high state
    Dear Friend, I am using a 64 pin VQFP AT89C51ED2 which has been mounted on a VQFP to DIP pcb. I observe at power up, the reset pin is latched up to high state. Wiring conditions are :Vcc=5V, Gnd, EA...
  • Bank switch code reads port, not latch.
    The sample L51_BANK.A51 module uses the following code to determine the current bank: ?B_BANK&N: MOV A,?B_CURRENTBANK ANL A,#?B_MASK CJNE A,#BANK&N,XLABEL ; etc... For 8051 compatible devices...
  • Bank switch code reads port, not latch.
    The sample L51_BANK.A51 module uses the following code to determine the current bank: ?B_BANK&N: MOV A,?B_CURRENTBANK ANL A,#?B_MASK CJNE A,#BANK&N,XLABEL ; etc... For 8051 compatible devices...
  • Data recieved from UART does not latch on any Port
    I have this very strange problem. I am recieving data on UART and when I try to throw the data on any port, it shows up mometarily on the port and then all the port goes to zero. I do not understand this...