FB Twitter Google Plus
My Basket:

Shopping Cart
Your basket is currently empty.


Click to view the full basket.
Search Site

change currency to dollars change currency to pounds sterling change currency to euros
view the basket

Kanda - Frequently Asked Questions


Here is the answer to the frequently asked question.





Popular Products


Handheld Programmers
handheld programmers

Simple to load and use, standalone battery powered Handheld Programmers for AVR, PIC and Serial EEPROM


Low Cost CANUSB
Low cost USB CAN Adapter picture

Lawicel CANUSB adapter for simple CANBUS connection to PC




Question:

I programmed my Mega128 and now it will not connect to my programmer.



Answer:
All the new range of ATmega devices have fuses (CLKSEL) to configure them for use with specific types of hardware clocks. You may have programmed a setting which is not compatable with the clock circuit on your board. The common problem is this. The board has the normal crystal OSC circuit. Ticking CKSEL0,1,2,3 ("0000" in table6 p34 on M128 datasheet) sets the device to run from an external clock, so the crystal no longer runs. The correct setting would be "1111", no CLKSEL bits ticked, but since "1" is unprogrammed it is easy to set "0000" by mistake.This being the case, applying a suitable clock signal to the XTAL1 pin with a signal generator should allow the device to be detected again and the fuses reprogrammed.










      Product News       Special Offers       Sena Products       A-Z Product Index       Manufacturer Index       Software Downloads       Contact