Flash Magic Forum

In-System Programming Support => P89V51Rx2/P89LV51Rx2 => Topic started by: 6uoos on September 27, 2006, 09:46:53 pm

Title: problem :P89LV51RD2 connection
Post by: 6uoos on September 27, 2006, 09:46:53 pm
I try to program this MCS by FlashMagic but it's not work.
I 'm not sure that the problems are from circuits connection or not.
Could you please check them again, thankyou

Connection detail : ( in ISP mode )

- Quartz Crystal 16 MHz  with 30pF Capacitors
- PSEN pin connect with 3V
- EA  connect with Ground  
- RESET     : Using power on Reset circuit ,but use 10K Ohm instead of 8.2K
- ICL3232 (3.3 V ersion of Max232) it's work properly ,I checked it

For FlashMagic , I tried selecting every available Baudrate
Infact, I'm not sure about PSEN, EA, and RESET pin connection.
Thank you in advanced for your advices.  :)



Post Edited (09-27-06 21:53)
Title: Re: problem :P89LV51RD2 connection
Post by: Jan Waclawek on September 28, 2006, 12:17:14 am
> PSEN pin connect with 3V

Wrong, leave it floating.

> EA connect with Ground

Wrong, tie it to VDD

> RESET : Using power on Reset circuit ,but use 10K Ohm instead of 8.2K

Might work, but I'd recommend a proper reset IC

Jan Waclawek