In System Programming (ISP) for ATMEL chips
In System Programming (ISP) for ATMEL chips
In System Programming (ISP) for ATMEL chips
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>In</strong> <strong>System</strong> Programmer (<strong>ISP</strong>) <strong>for</strong> <strong>ATMEL</strong> micro controllers<br />
http://www.ikalogic.com/isp.php<br />
Page 11 of 29<br />
26-02-2008<br />
help me.<br />
Try the following: 1-Put a 10uF capacitor between pin 9 of the uController and the 5V rail.2-<br />
Slow down the speed3-make sure PIN 31 (ea) of the uController is connected to 5VThis is<br />
mostly the type of problems I found with friends that couldn't get their <strong>ISP</strong> programmer<br />
working... hope this helps..<br />
Reply With Quote<br />
Posted by:<br />
Anonymous<br />
visitor<br />
on: 11 May 2007<br />
Posted by:<br />
Ibrahim Kamal<br />
on: 11 May 2007<br />
Posted by:<br />
kalpesh patel<br />
on: 11 May 2007<br />
Posted by:<br />
Ibrahim Kamal<br />
on: 11 May 2007<br />
[Quoting: Ibrahim Kamal]<br />
[Quoting: kalpesh patel] I am able to read hex file from 89s52 chip but can't erase or<br />
write the chip, even though i have tried it on three device but still i can't gate success. so,<br />
please help me.<br />
Try the following: 1-Put a 10uF capacitor between pin 9 of the uController and the 5V rail.2-<br />
Slow down the speed3-make sure PIN 31 (ea) of the uController is connected to 5VThis is<br />
mostly the type of problems I found with friends that couldn't get their <strong>ISP</strong> programmer<br />
working... hope this helps..<br />
I am using 10M Hz crystal. so, what amount of maximum speed i can use.<br />
[Quoting: ]<br />
[Quoting: Ibrahim Kamal]<br />
I am using 10M Hz crystal. so, what amount of maximum speed i can use.<br />
Reply With Quote<br />
[Quoting: kalpesh patel] I am able to read hex file from 89s52 chip but can't erase or<br />
write the chip, even though i have tried it on three device but still i can't gate success.<br />
so, please help me.<br />
Try the following: 1-Put a 10uF capacitor between pin 9 of the uController and the 5V<br />
rail.2-Slow down the speed3-make sure PIN 31 (ea) of the uController is connected to<br />
5VThis is mostly the type of problems I found with friends that couldn't get their <strong>ISP</strong><br />
programmer working... hope this helps..<br />
Well, i usually let the software handle this by chooseing "Maximum speed".. but you can get it<br />
by trial and error.. it depends on many things like cable length.. noize.. crystal (<strong>for</strong> sure)...<br />
etc.<br />
[Quoting: Ibrahim Kamal]<br />
Reply With Quote<br />
[Quoting: kalpesh patel] I am able to read hex file from 89s52 chip but can't erase or<br />
write the chip, even though i have tried it on three device but still i can't gate success. so,<br />
please help me.<br />
Try the following: 1-Put a 10uF capacitor between pin 9 of the uController and the 5V rail.2-<br />
Slow down the speed3-make sure PIN 31 (ea) of the uController is connected to 5VThis is<br />
mostly the type of problems I found with friends that couldn't get their <strong>ISP</strong> programmer<br />
working... hope this helps..<br />
Actually pin 31(ea) is generally used to select the rom and ram. i think which may came into<br />
picture after programming of the device. so, why sould we connect pin31 to Vcc at the time of<br />
programming using isp.<br />
[Quoting: kalpesh patel]<br />
[Quoting: Ibrahim Kamal]<br />
Reply With Quote<br />
[Quoting: kalpesh patel] I am able to read hex file from 89s52 chip but can't erase or<br />
write the chip, even though i have tried it on three device but still i can't gate success.<br />
so, please help me.<br />
Try the following: 1-Put a 10uF capacitor between pin 9 of the uController and the 5V<br />
rail.2-Slow down the speed3-make sure PIN 31 (ea) of the uController is connected to<br />
5VThis is mostly the type of problems I found with friends that couldn't get their <strong>ISP</strong><br />
programmer working... hope this helps..<br />
Actually pin 31(ea) is generally used to select the rom and ram. i think which may came<br />
into picture after programming of the device. so, why sould we connect pin31 to Vcc at the<br />
time of programming using isp.<br />
Let me correct this, Pin 31 (EA) Let the internal processor access external or internal memory.<br />
to use <strong>ISP</strong>, internal memory access must be enabled, in order to let the processor store the<br />
received serial data into the internal flash memory.<br />
Reply With Quote