| The RED power LED is not ON |
The DC power cable is not connected |
Connect the DC power cable to the DC jack (see "Quick Start"). |
| Wrong power supply is used |
Check that the power supply is of DC type 10-15V, min 500mA. (see "Quick
Start"). |
| The power switch is OFF |
Turn on the power switch |
| The preprogrammed example code does not toggle the LEDS |
There is no Atmel AVR device in the socket |
Plug the AVR device into the right socket (see "ISP Programming" and "High Voltage Programming") |
| The LEDS are not connected to the I/O ports |
Connect the LEDS header to the PORTD header, and SWITCHES header to PORTB header
(see "Connection of LEDs and Switches") |
| The flash memory is erased |
Connect the Atmel STK500 to a PC and reprogram the AVR device (see Using Atmel Studio with Atmel STK500) |
| The AVR device can not be programmed |
The PC serial cable is not connected |
Connect the serial cable to the PC COM port and the RS232 CTRL port |
| The AVR device is inserted in wrong socket |
Check the correct socket is used (see "ISP Programming" and "High Voltage Programming") |
| The AVR device is inserted with wrong orientation |
Check that the notch on the AVR socket matches the notch on the AVR device. |
| The target ISP header is not connected |
Connect the 6-pin flexible cable from ISP6PIN header to the correct SPROG target
ISP header (see ISP Programming) |
| The jumpers settings are wrong |
Set jumper to default setup (see "Jumper Settings") |
| The VTARGET voltage is too low |
Check the AVR datasheet for minimum operating voltage |
| The memory lock bits are programmed |
Erase the memory before programming |
| Reset disable fuse is set. |
Check reset disable fuse. |
| Programming too fast. |
Check STK500 oscillator settings and make sure it is not set higher than target
clock. |
| CKDIV fuse is set. |
Reduce ISP programming speed |
| External pullup resistor on reset line too low. |
Ensure that external pullup resistor is ≥4.7kΩ. |
| Atmel Studio does not detect STK500 |
Serial cable is not connected, or power is off |
Connect serial cable to RS232 CTRL and check power connections |
| PC COM port is in use |
Disable other programs that are using PC COM port |
| Change PC COM port |
| STK500 cannot be switched off. |
Positive center power connector is used. |
Use negative center power connector.Turn off STK500 by removing power
connector. |
| The status LED is blinking slowly |
There is a short circuit on AREF |
Resolve the short circuit. |
| The status LED is blinking quickly. |
There is a short circuit on VTarget. |
Resolve the short circuit. |
| An external VTarget is being used and has been turned off. |
Set VTarget to a value below 0.3V in Atmel Studio. |
| ATtiny13 programming does not work. |
Start-up time is set too short |
Read ATtiny13 Programming Issues. |
| The LEDs don’t work (running from external VTarget.) |
STK500 must be powered for LEDs to work. |
Supply poser to STK500 and turn it on. |
| Problem |
Reason |
Solution |