Atmel megaAVR, Getting Started

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megaAVR™ Starter Kit Manual 4-1
Section 4
Hardware Description
The main features of the board are shown in the diagram below.
Note:
There are a number of jumpers on the board which are used to select different
operations and voltages. The default jumper settings are for programming oper-
ations at 5V JP1 Closed, with brown-out also set to 5V JP2 Open.
To carry out other operations, some jumpers may have to be removed—refer to
the relevant section for details. A full list of the jumpers and links are given in the
following table.
LCD CONNECTOR
ANALOG REFERENCE
VOLTAGE ADJUSTMENT
PLUG IN MEGA
BOARD HERE
ANALOG I/P
PORT A DIGITAL
4 MHz CRYSTAL
PORT B HEADER
PORT C HEADER
PORT D JUMPERS
DISABLE SWITCHES
PORT D HEADER
MISC. HEADER
FOR NON-PORT PINS
JP2 - JUMPER
FOR BROWN-OUT
AT 2.9V OR 4.5V
8 LEDS ON
PORT B
8 SWITCHES
ON PORT D
JP1 JUMPER FOR
3.3 OR 5V VCC SELECT
ON-OFF
SWITCH
POWER INPUT
9-15V DC
OR 7-12 AC
RS232
PORT B JUMPERS
DISABLE LEDS
POWER ON AND
PROG LIGHTS
SELECTOR
FOR RS232
ISP INTERFACE
ADDRESS LATCH
IC FOR RAM
EXTERNAL
SRAM SOCKET
EXTERNAL
MEMORY EXPANSION
LCD CONTRAST
ADJUSTMENT
LK1 - CUT FOR A/D
EXTERNAL REFERENCE
O/P PINS FOR -VE
SUPPLY TO
OPAMP ETC.
PORT E HEADER