Synth-DIY Yahoo! Groups Archives

Thread

AT89C2051 reset pin pulled down?

2007-01-23 by magzky02

Hello guys,

I need help, As far as i know, reset pin sould be pulled up... pulling 
it down will reset the device... I am puzzled on AT89C2051...datasheet 
says that holding the reset high will reset the device... DOes this 
mean i have to pull down the reset pin? datasheet also specified the 
reset pulldown resistor value to be from 50 to 300 KOhm... Im confused.

thanks

mago

Re: [AVR-Chat] AT89C2051 reset pin pulled down?

2007-01-23 by John Samperi

At 12:43 PM 23/01/2007, you wrote:
>I am puzzled on AT89C2051...datasheet
>says that holding the reset high will reset the device... DOes this
>mean i have to pull down the reset pin?

Correct, this chip is not an AVR. Some micros do need the reset
to be high some to go low.


Regards

John Samperi

********************************************************
Ampertronics Pty. Ltd.
11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA
Tel. (02) 9674-6495       Fax (02) 9674-8745
Email: john@ampertronics.com.au
Website  http://www.ampertronics.com.au
*Electronic Design * Custom Products * Contract Assembly
********************************************************

Re: [AVR-Chat] AT89C2051 reset pin pulled down?

2007-01-23 by mago Umandam

Hi John,
   
  Thank you for the comment. I was using ATmega16 before and reseting the device is doing the otherway around.
   
  mago
   
  

John Samperi <samperi@ampertronics.com.au> wrote:
          At 12:43 PM 23/01/2007, you wrote:
>I am puzzled on AT89C2051...datasheet
>says that holding the reset high will reset the device... DOes this
>mean i have to pull down the reset pin?

Correct, this chip is not an AVR. Some micros do need the reset
to be high some to go low.

Regards

John Samperi

********************************************************
Ampertronics Pty. Ltd.
11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA
Tel. (02) 9674-6495 Fax (02) 9674-8745
Email: john@ampertronics.com.au
Website http://www.ampertronics.com.au
*Electronic Design * Custom Products * Contract Assembly
********************************************************



         

  
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