2.5
Atmel STK521 switches configuration
The switches shown in
Figure 2-6. STK521 switches.
Table 2-5. STK521 switches description.
Switches
CLOCK
RESET
POWER
STK521 User Guide
Figure 2-6
are described in
Function
Clock source selection
Reset pin configuration
Power supply source
selection
Table 2-5
.
Description
EXT: clock from crystal plugged in Ext Clock socket
STK500: clock from Atmel STK500
INT RC: clock from internal RC oscillator
RST/: Product reset pin is connected to STK500 reset button
PE0: Product reset pin is connected to PE0 on PORTE header
VEXT: External power supply through power jack
VTG: STK500 power supply through expansion header
2-9
8194B–AVR–01/12
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