Hello Neil,

I know it not 8052, its extention to 8052.

I have configured the P0.7 as push pull

P0M1 &= 0x7F;
P0M2 |= 0x80;
in my posted code.

Its my bad i dont have comments in the code let me do that.

and other thing configuring Internal oscillator i have configured it to 7.3728 MHz.
TRIM |= 0x40;

Still i am not getting any response from microcontroller.

Please advice.

Thanks