In System Programming (ISP) for ATMEL chips

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In System Programmer (ISP) for ATMEL micro controllers http://www.ikalogic.com/isp.php Page 16 of 29 26-02-2008 Reply With Quote Posted by: Anonymous visitor on: 22 Jun 2007 Posted by: Ibrahim Kamal on: 22 Jun 2007 [Quoting: mvs sarma] Hi suetaM,1. ensure that the 5V supply is noisefree. If you use 5V regulator -ensure that the input is more than 8Vdc even with a 20mA load at the output.2. ensure that the sck clock is set at LESS THAN 1/16th of the crystal frequency used.3. esuure that the cable length between RS232 port and the programmer is minimum.4. definitely check for any dry joints-- DON'T USE TEMPORARY ESTABLISHMENT LIKE BREADBOARD as this will cause intermittant connections.5. put a 10uF capacitor between Vcc and Gnd VERY NEAR TO THE 89S52 PINS.6. ENSURE THAT PINS 40 AND 31 ARE CONNECTED PROPERLY. Perhaps you are already aware of all these funds.with these precautions you will succeed.Sarma I solve the problem using a capacitor between pins 40 and 20 from 89s51. Maybe it's a noise problem. Reply With Quote [Quoting: ]I solve the problem using a capacitor between pins 40 and 20 from 89s51. Maybe it's a noise problem. Yes, lately i discovered this ISP programmer is very prone to noize. try to reduce noize by all means... Reply With Quote Posted by: Irsa on: 26 Jun 2007 Thanks for info Reply With Quote Posted by: Rejith on: 29 Jun 2007 Posted by: maryam on: 30 Jun 2007 Posted by: Jaspal on: 27 Jul 2007 Posted by: jaspal on: 27 Jul 2007 Posted by: Ibrahim Kamal on: 27 Jul 2007 Posted by: mohan on: 28 Jul 2007 Posted by: mvs sarma on: 29 Jul 2007 There seem to be no problem with the circuit or the software as somebody mentioned above. It works fine Reply With Quote you're great!!!your programer was the most intresting project i have done in my life.thank you very muchi hope bests for you. Reply With Quote my device is 89s52 but it didn't work the isp program send message "WRITE LOCKED" i check the cable,power and lockbits but i cant success to connect my device and isp program what do you think this problem??? When i erase the controller it is erased properly but not programmed..what should i do??i had also chek my controller on universal progrmmer it is found ok and program through it...but it can't program through isp?? pls help i am facing same type of problem?? had u find any solution??? pls let me know Reply With Quote [Quoting: danny] erase..okproblem:write error at adress 00000000 byte written:02 byte read: 00help me please Reply With Quote [Quoting: Jaspal] my device is 89s52 but it didn't work the isp program send message "WRITE LOCKED" i check the cable,power and lockbits but i cant success to connect my device and isp program what do you think this problem??? When i erase the controller it is erased properly but not programmed..what should i do??i had also chek my controller on universal progrmmer it is found ok and program through it...but it can't program through isp?? pls help have you tried to use another micro? i hade some micro controllers that accepted to be programmed via universal programmer but not through ISP... Reply With Quote please tell me it's specificationhow to use it with target hardware without removing ic Reply With Quote Attention Jaspal,you may have to completely errese the chip and check for blank condition. your program should not contain locking bits for the time beingyou have to set up the clk speed to a little below 1/16th of the crystal frequncy.you need to place a 10uF cap between Vcc and Gnd pins of the target IC.Please try out.Last but not leaset the Vcc should be 5+/- 0.25 V DC Reply With Quote
In System Programmer (ISP) for ATMEL micro controllers http://www.ikalogic.com/isp.php Page 17 of 29 26-02-2008 Posted by: ASHWINI on: 07 Aug 2007 Posted by: Ibrahim Kamal on: 07 Aug 2007 Posted by: Ms. TORAL on: 07 Aug 2007 Posted by: Ibrahim Kamal on: 07 Aug 2007 Posted by: nagesh on: 10 Aug 2007 Posted by: Ibrahim Kamal on: 10 Aug 2007 Posted by: nagesh on: 10 Aug 2007 Posted by: Ibrahim Kamal on: 10 Aug 2007 Posted by: mvs sarma on: 11 Aug 2007 Posted by: nagesh on: 12 Aug 2007 Posted by: i want to know how to transfer parallel data from port0 of IC 89C52 TO PORT 1 serially. this article explains what you need. Reply With Quote [Quoting: ASHWINI] i want to know how to transfer parallel data from port0 of IC 89C52 TO PORT 1 serially. Reply With Quote in 89C51, with 11.0592mhz crystal we r using two capacitors of 30 pf, why to use those two capacitor along with crystal? Reply With Quote [Quoting: Ms. TORAL] in 89C51, with 11.0592mhz crystal we r using two capacitors of 30 pf, why to use those two capacitor along with crystal? Altough this has nothing to do with the subject of this page, i'll replie. Those capacitors are to assure te stability of the oscillating frequency. They are not critical for the operation of the mirco controller, but they'll increase the accuracy of the clock. Reply With Quote My ISP circuit works but sometimes.the problem is if i give"erase&program" command only some part of the hex file will be written and i shows "error in memory location C0 or FF10 etc".So after being tried for 5-8 times, sometimes it may write completly..so plz clarify this problem.whether it may be due to circut or my computer port..? i've used 11.0935MHz crystal.. Reply With Quote [Quoting: nagesh] My ISP circuit works but sometimes.the problem is if i give"erase&program" command only some part of the hex file will be written and i shows "error in memory location C0 or FF10 etc".So after being tried for 5-8 times, sometimes it may write completly..so plz clarify this problem.whether it may be due to circut or my computer port..? i've used 11.0935MHz crystal.. This is most probably due to a noizy power supply. Add decoupling capacitors acrross the supply rails of your micro controller and try to use a better power supply. If you'r working with a 5V supply from a PC, try stepping down the 12V supply using a 7805 voltage regulator.Try also reducing the length of the cable to 0.5 m max.But before anything else, you may simply try to reduce the writing speed from "fastest" to something like 2Mhz.. Good luck Reply With Quote thanx for ur suggetions.And further I am using a SMPS adapter with variable output voltages to get 7V DC, then again i am using a LM7805 based regulator stage to obtain 5vdc and i've conneected a 0.01mF ceramic capacitor across the output rails..Now whether i've to eliminate this stage...? plz reply me.. Reply With Quote [Quoting: nagesh] thanx for ur suggetions.And further I am using a SMPS adapter with variable output voltages to get 7V DC, then again i am using a LM7805 based regulator stage to obtain 5vdc and i've conneected a 0.01mF ceramic capacitor across the output rails..Now whether i've to eliminate this stage...? plz reply me.. Those adapter tends to be pretty noizy. Try adjusting it to 9V or 12V instead of 7V. The capacitor is fine, keep it.try all the suggestions on this forum, and keep ut posted.good luck Reply With Quote Dear Nagesh, It is better you use a linear adopter salvaged from any unused devise with atleast above 8 V --say 9V DC. try using a 7805 with 4.7uF at its output -- this should serve your purpose. A noisy PSU will always trouble you. -- most important , try to minimize the cable length beteen PC and the programmer and also the ISP cable length. Sarma Reply With Quote Yeh..It works fine now.first i had reduced the writing speed to 2MHz,but there were errors sometime.then i reduced the cable length to half meter,and now it is fine..Thanx to supportive response by Mr.IKA and Mr.MVS Sarma Reply With Quote Good Morning if you have serial port ISP detail if you have kindly send me.The above kit i develop and send my feedbackThank youM E Raja
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