Hardware Description
AVR STK500 User Guide 3-15
1925C–AVR–3/03
3.8 Jumper Settings A master microcontroller and the eight jumpers control the hardware settings of the
starter kit. During normal operation these jumpers should be mounted in the default
position. To configure the starter kit for advanced use, the jumpers can be removed or
set to new positions. The jumper settings and usage are explained in the following sec-
tion. The default setting of the jumpers are shown in Figure 3-20.
Figure 3-20. Default Jumper Setting
Table 3-4. Description of Jumpers
Jumper Description of Default Setting
VTARGET On-board VTARGET supply connected
AREF On-board Analog Voltage Reference connected
RESET On-board Reset System connected
XTAL1 On-board Clock System connected
OSCSEL On-board Oscillator selected
BSEL2 Unmounted. Used for High-voltage Programming of ATmega8,
ATmega16, ATmega161, ATmega163, ATmega128, and ATmega323
PJUMP Unmounted. Used for High-voltage Programming of AT90S2333,
AT90S4433, and ATmega8
VTARGET
AREF
RESET
XTAL1
OSCSEL
BSEL2
PJUMP