its a 89c55wd mpu .... and put in a maxim 6731 reset ic


Assuming the chip is Atmel it is reset HIGH and the supervisor you have chosen is reset LOW.

Also, are you sure you want a supervisor with a watchdog (you will need to code constant banging of it).

on a further note, why do you not chose an ISP chip such as the 89c51Rx2 instead of the older derivative you have selected?

Erik