Sources for more information.

Crystal socket:

In this socket you can mount a crystal of your choosing. Set the clock

switch to HF. See Clock Sources for more information.

32kHz crystal:

This 32kHz crystal can be routed to the AVR through the clock switch.

Set the switch to LF. See Clock Sources for more information.

JTAG:

Here you can connect your JTAGICE mkII or other JTAG test equipment.

See the JTAG Connection chapter for a detailed description.

SPROG:

The AVR can be programmed through this connector using the ISP

programming mode. See In-System Programming for more information.

Mounting the STK504

The first thing you should do is to mount the STK504 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 STK504 on top of the STK500. Make sure the EXPAND0 and

EXPAND1 connectors on both cards align properly (see figure 3-2).

Figure 3-2: Mounting the STK504

Placing the AVR in the ZIF socket

The ZIF socket located on the STK504 board takes AVRs with LCD controller in

6