The Question for ADuC7020 download program

we adopted ADuC7020 and ADM101E for the program download from Keil to ADuC7020.The schematic of circuit as follows:

when we download the program to the chip.we turn BM/P0.0 from high level to low level,as shown from 1 to 2 in Figure.but the software ARMWSD show the follows:

program can not download to chip,and false code are displayed in the panel.

what's wrong with our schematic,can you give me some suggestion,thanks.

Parents
  • Hi Richard,

    I checked RS-232 to PC by software of CommUART Assistant,which shown the connection is intact.

    For the ADM101E data sheet Figure 1,I think 0.1uF capacitors between Pin 1 and Pin 10(or Pin 3 and Pin 1) only filter ripple of power supply,which have no significant effect on the function of the ADM101E.Also,we used non polar ceramic capacitor instead of polar tantalum capacitors. Do you think the type of capacitors influence the function of ADM101E?


    Best Regards,


    Zhoujx


Reply
  • Hi Richard,

    I checked RS-232 to PC by software of CommUART Assistant,which shown the connection is intact.

    For the ADM101E data sheet Figure 1,I think 0.1uF capacitors between Pin 1 and Pin 10(or Pin 3 and Pin 1) only filter ripple of power supply,which have no significant effect on the function of the ADM101E.Also,we used non polar ceramic capacitor instead of polar tantalum capacitors. Do you think the type of capacitors influence the function of ADM101E?


    Best Regards,


    Zhoujx


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