The target power LED is lit when voltage applied to the target AVR device is 0.9V or higher.
Status LED
z
ORANGE: Busy programming
z
ORANGE/RED Blinking: Upgrade mode
z
RED: No board detected.
z
GREEN: READY
z
ORANGE Blinking: Wrong combination of routing and socket card.
z
RED Blinking: VTarget or Aref short circuited.
z
RED Blinking high frequency: To much current drawn from supply. If powered from USB, try to connect an external supply to DC jack.
During programming the LED has orange color. When the target AVR device is successfully programmed the LED will turn green
Chapter 5. Programming
ISP Programming
In-System Programming uses the AVR internal SPI (Serial Peripheral Interface) to download code into the flash and EEPROM memory of the
AVR. ISP programming requires only VCC , GND, RESET and 3 signal lines for programming. No high voltage signals are required. The ISP
programmer can program both the internal flash and EEPROM, fuses, lockbits and calibration bytes.
Note that the ISP frequency (SCK) must be less than 1/4 of the target clock. The ISP frequency is set by the STK600 programming dialog in AVR
Studio.
Note that if ISP programming will NOT work if one or more of the following cases are true:
z
SPIEN, SPI Enable fuse is un-programming
z
RSTDISBL, Reset Disable fuse is programmed (for devices with this fuse)
z
DWEN, DebugWIRE Enable fuse is programmed (for devices with this fuse)
Refer to the AVR datasheet for information about the fuses.
Use High-Voltage programming to re-enable the ISP interface from the situation listed above. Either HVPP or HVSP depending on what is
supported by the AVR.
Hardware setup for On-board programming
1. Mount the routing and socket card and the target device. See the Socket System section on how to do this.
2. Connect a 6-wire cable between the two 6-pins ISP headers on the STK600. See picture below.
3. Ensure that the VTARGET jumper is mounted, and that the voltage is the within the operating range for the target device.
Page 27 of 35
STK600 User Guide
2008-06-20
file://C:\Documents and Settings\PAWEL\Ustawienia lokalne\Temp\~hhE369.htm
