Atmel megaAVR, Getting Started

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Hardware Description
4-2 megaAVR™ Starter Kit Manual
4.1 Jumpers, Links
and their
Functions
4.2 External
Connections
All Ports are brought out to edge of board on to headers. Each header has a VCC and
Ground pin for power supply to external circuits. Port F is the Analog input port and is on
the header marked “Analog”. There is an extra six-pin header for miscellaneous func-
tions—Read, Write, ALE, Reset, Ground and VCC.
See sections “Using External Connections” on page 9-1 and “Using Analog Functions”
on page 9-2 for details.
Jumper Function Open Closed Default
JP1 Voltage select 5V 3.3V Open
JP2 Brown-out select 2.9V 4.5V Closed
PE0 RS232 RXD Port E.0 RXD Port E.0
PE1 RS232 TXD Port E.1 TXD Port E.1
Port B LEDs LEDs Disabled LEDs Enabled Closed
Port D Switches Switches Disabled Switches Enabled Closed
LK1 Analog
Reference If LK1 cut, then
EXTERNAL REF
from header ONBOARD POT Closed
CUT Under
Board LCD Contrast If Cut, add
extra resistor Contrast Pot Closed