| Problem | Reason | Solution |
|---|---|---|
| The main power LED is dark | The power switch is OFF | Turn on the power switch |
| No power source is connected to STK600 |
Do one of the following:
|
|
| The pre-programmed example code does not toggle the LEDs | There is no AVR device in the socket | Plug the AVR device into the right socket (see ISP Programming and Parallel 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 LEDs and Switches) | |
| No target voltage | Ensure that the VTG jumper is mounted and that VTG is set above 1.8V. VTG can be adjusted in the programming dialog of Atmel Studio. | |
| The Flash memory is erased | Reprogram the AVR device | |
| The AVR device cannot be programmed using SPI | The AVR device is inserted with a wrong orientation | Check that the notch on the AVR device socket matches the notch on the AVR device |
| The ISP/PDI headers are not connected | Connect the 6-pin flexible cable between the two 6-pin ISP/PDI headers | |
| The VTARGET voltage is too low | Check the AVR device data sheet for the minimum operating voltage | |
| The memory lock-bits are programmed | Erase the memory before programming | |
| The SPI enable fuse is unprogrammed | Program the SPIEN fuse by following section Parallel High-Voltage Programming or Serial High-Voltage Programming | |
| Reset disable fuse is set | Check reset disable fuse | |
| SPI frequency is too high | Check STK600 SPI frequency and make sure it is lower than the target clock divided by 4 | |
| CKDIV fuse is set | Reduce ISP programming speed | |
| External pull-up resistor on the Reset line is too low | Ensure that the external pull-up resistor is ≥4.7 kΩ | |
| AREF0 jumper mounted | For some devices, the AREF0 is connected to a pin used for the ISP interface. The AREF0 jumper must, therefore, be removed to do serial programming of these devices. See the ISP Programming section for which routing cards this applies. | |
| The AVR device cannot be programmed using JTAG | The VTARGET voltage is too low | Check the AVR device data sheet for the minimum operating voltage |
| The JTAG headers are not connected | Connect the 10-pin flexible cable between the two 10-pin JTAG headers. See JTAG Programming. | |
| The JTAG enable fuse is unprogrammed | Program the JTAGEN fuse by following section Parallel High-Voltage Programming or Serial High-Voltage Programming | |
| The memory lock bits are programmed | Erase the memory before programming | |
| The AVR device cannot be programmed using high-voltage programming | The VTARGET voltage is too low | Ensure that the voltage is at least 4.5V |
| The high-voltage programming headers are not connected | Mount cables between the programming headers. See Parallel High-Voltage Programming or Serial High-Voltage Programming | |
| The reset jumper is not mounted | Mount the reset jumper | |
| The I/O ports are connected to peripheral circuitry (LEDs, switches, etc.) | Remove all peripheral connections from the I/O ports belonging to the high-voltage programming interface | |
| The memory lock-bits are programmed | Erase the memory before programming | |
| AREF0 jumper mounted | For some devices, the AREF0 is connected to a pin used for the parallel programming interface. The AREF0 jumper must, therefore, be removed to do parallel programming of these devices. See the Parallel High-Voltage Programming section for which routing cards this applies. | |
| Atmel Studio cannot connect to STK600 | The USB cable is not connected, or the power is off | Connect the USB cable |
| The firmware is in a hang-up state | Toggle power on STK600 | |
| The status LED is blinking orange | A wrong combination of routing and socket card or the card is removed when the kit is powered | Check the device support file for routing and socket card combination. Always turn OFF the kit power before removing or mounting routing and socket cards. |
| The status LED is blinking orange | The mounted cards are not recognized by STK600 | The routing and socket card identification table in STK600 must be upgraded. Start Atmel Studio and connect to the kit using programming dialog. This will initiate a silent upgrade of the routing and socket card table in the STK600 controller. |
| The status LED is blinking red with low frequency | Short circuit on VTarget or AREF | Resolve the short circuit |
| The status LED is blinking red with high frequency | Too much current drawn from the power supply | If the kit is powered by USB, try connecting external power to the DC jack |
| The status LED is steady red | Slave MCU not responding | Force STK600 into Bootloader mode, and perform a firmware upgrade |
| The LEDs do not work (running from external VTarget) | STK600 must be powered for LEDs to work | Supply power to STK600 and turn it ON |