Atmel STK500 - Manual (Page 4)

4
Mounting the STK505
The first thing you should do is to mount the STK505 onto the STK500.
1. Turn off the power on STK500.
2. Remove any other top card from the STK500.
3. Remove any AVR mounted in any of the sockets on the STK500.
4. Place the STK505 on top of the STK500. Make sure the EXPAND0 and
EXPAND1 connectors on both cards align properly.