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P89v51RD2 hardware condition to enter in ISP mode

Ashish Garag

for P89v51RD2 what is the hardware condition to enter in ISP mode?

  • 0

    just a reset.

    click the flash magic 'start' button first and the reset the controller.

  • 0 in reply to Ash J

    is there any need to control PSEN pin for P89v51RD2.?
    i have tied PSEN to VCC and programmed, it gets program propely.
    But for programming as per datasheet,PSEN should made low when RESET is high and it should be made HIGH after reset is made LOW.
    so my concern is that even if don't go as per datasheet the IC gets programmed and if i connect PSEN to VCC and RESET the IC then will it program every time.?