RESET circuit for NXP P89C61X2 microcontroller

Started by rajesh279, February 19, 2012, 09:52:20 PM

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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 ?


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.

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