STK521 User Guide
2-9
8194B–AVR–01/12
2.5
Atmel STK521 switches configuration
are described in
.
Figure 2-6.
STK521 switches.
Table 2-5.
STK521 switches description.
Switches Function
Description
CLOCK
Clock source selection
EXT: clock from crystal plugged in Ext Clock socket
STK500: clock from Atmel STK500
INT RC: clock from internal RC oscillator
RESET
Reset pin configuration
RST/: Product reset pin is connected to STK500 reset button
PE0: Product reset pin is connected to PE0 on PORTE header
POWER
Power supply source
selection
VEXT: External power supply through power jack
VTG: STK500 power supply through expansion header
Summary of Contents for STK521
Page 1: ...8194B AVR 01 12 STK521 User Guide ...
Page 18: ...STK521 User Guide 6 16 8194B AVR 01 12 Figure 6 1 Schematics 1 of 3 ...
Page 19: ...STK521 User Guide 6 17 8194B AVR 01 12 Figure 6 2 Schematics 2 of 3 ...
Page 20: ...STK521 User Guide 6 18 8194B AVR 01 12 Figure 6 3 Schematics 3 of 3 ...
Page 21: ...STK521 User Guide 6 19 8194B AVR 01 12 Figure 6 4 Assembly drawing 1 of 1 ...
