Author Topic: P89LV51RD2 reset circuit  (Read 5369 times)


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P89LV51RD2 reset circuit
« on: October 29, 2004, 09:53:41 am »
Hello all,

I'm having problems with my reset circuit. I'm trying to program P89LV51RD2. Right now we just have a button to reset the controller. Can somebody give me an example of a reset circuit that could be used?

Thank you,


Andy Ayre

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Re: P89LV51RD2 reset circuit
« Reply #1 on: October 29, 2004, 09:58:55 am »
I guess the best reset circuit is one that uses a supervisor IC. The datasheets of such devices should have example circuits in them.

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Re: P89LV51RD2 reset circuit
« Reply #2 on: December 03, 2004, 08:02:51 am »
Hi nitin,
               you place just 10uf to vcc and rst pin and a 10k ohm resistor in between rst and gnd pin. its sufficeint for reset the chip. if you r facing problem on isp than just open flash magic select chip go to ISP menu select read signatur byte it will as for reset the device in the isp menu than swith on the device it will detect and will give you signature byte remeber dont pull down psen pin like 89c51rd2 it is not required in 89v51rd2 it is very simple and easy.


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Re: P89LV51RD2 reset circuit
« Reply #3 on: January 08, 2005, 02:52:25 am »
i was using P89C51RD2BN , and i don't know how to conect PIN Vpp to +5/12V or GND