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In-System Programming Support
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P89C51Rx+/P89C51Rx2/P89C66x/P89C6xX2/P89V66x
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RESET circuit for NXP P89C61X2 microcontroller
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Topic: RESET circuit for NXP P89C61X2 microcontroller (Read 15588 times)
rajesh279
Jr. Member
Posts: 2
RESET circuit for NXP P89C61X2 microcontroller
«
on:
February 19, 2012, 09:52:20 PM »
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.
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Andy Ayre
ESAcademy Staff
Sr. Member
Posts: 2190
Re: RESET circuit for NXP P89C61X2 microcontroller
«
Reply #1 on:
February 20, 2012, 12:10:59 AM »
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
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Embedded Systems Academy, Inc.
support at esacademy dot com
rajesh279
Jr. Member
Posts: 2
Re: RESET circuit for NXP P89C61X2 microcontroller
«
Reply #2 on:
February 21, 2012, 05:52:10 AM »
Please see the attached circuit. The pin 11,12 and 13 of LS245 is connected to STCP, SHCP and DS pin respectively of 74HC595.
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Flash Magic Forum
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In-System Programming Support
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P89C51Rx+/P89C51Rx2/P89C66x/P89C6xX2/P89V66x
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RESET circuit for NXP P89C61X2 microcontroller