RESET circuit for NXP P89C61X2 microcontroller

[rajesh279]

Hi,
I am using Flashmagic to program P89C61X2BN microcontroller through ISP. There is no RESET circuit available on board.
Can anyone please provide me a RESET circuit to RESET the controller in ISP mode before using Flashmagic ?

Regards
R.S.

[Andy Ayre]

Typically reset circuits are a capacitor and resistor or an external watchdog device. Then you just need a jumper or switch on the ISP entry pin per the device user manual.

Andy

[rajesh279]

Please see the attached circuit. The pin 11,12 and 13 of LS245 is connected to STCP, SHCP and DS pin respectively of 74HC595.