NEX ROBOTICS Fire Bird V ATMEGA2560 Software Manual page 43

NEX Robotics
2.10 Fuse settings for ATMEGA8 (Slave) microcontroller
All the microcontroller's Fuse settings are factory set at the NEX Robotics before shipping the
robot. Do not change them. This information is only given for the reference.
All the Fuse settings are done using AVRISP mkII programmer. For starting AVRISP mkII refer
to section 2.8.
To check the fuse settings click on the Fuse tab. Following window shown in figure 2.51 will
appear. To verify the fuse settings press "Read". To write fuse settings after modifications press
"Program". Make sure that "Auto Read", "Smart warning" and "Verify after programming" are
checked.
Following fuse settings are done:
1. Brown-out detection set at 2.7V (checked)
2. Clock option (SUT CKSEL) set as internal RC oscillator set at 8MHz i.e. "Int. RC Osc.
8MHz; Start-up time: 6CK + 0ms"
Important:
1. Never ever ever ever ... select external crystal oscillator option in "SUT_CKSEL" for the
ATMEGA8 microcontroller. As ATMEGA8 doesn't have the crystal oscillator it will not
able to respond to anything from any device and we have to replace the microcontroller.
2. Before loading hex file or reading fuse settings ensure that jumpers at J4 are open as
shown in figure 2.38 and are not as shown in figure 2.39.
Firmware for the ATMEGA8 (Slave microcontroller)
Firmware for the ATMEGA8 microcontroller is located in the folder "GUI and Related
Firmware \ ATMEGA8 hex file"
www.nex-robotics.com
Figure 2.51
Fire Bird V Software Manual
43