mikroElektronika EasyAVR v7, User Manual

Page: 9 / 33

supported MCUs
Using external clock
Only one microcontroller may be plugged into the development board at the same time.
Before you plug the microcontroller into the
appropriate socket, make sure that the
power
supply is turned off.
Images above show how to
correctly plug a microcontroller. First make sure that
a half circular cut in the microcontroller DIP packaging
matches the cut in the DIP socket. Place both ends of
the microcontroller into the socket as shown in
Figure
4-2
. Then put the microcontroller slowly down until
all the pins match the socket as shown in
Figure 4-3
.
Check again if everything is placed correctly and press
the microcontroller until it is completely plugged into
the socket as shown in
Figure 4-4
.
Figure 4-2: Place both ends of microcontroller on
the socket so the pins are aligned correctly Figure 4-3: with both fingers, evenly distribute
the force and press the chip into the socket.
Figure 4-4: Properly placed microcontroller will
have equally leveled pins.
Figure 4-5: Position of
the jumpers for DIP40x
How to properly place your microcontroller into the DIP socket?
1 2 3
IMPORTANT:
page 9
Easy AVR
v7
AVR microcontrollers can use either built-in (internal) or quartz-crystal external clock for
the purpose of providing clock signal source. The
EasyAVR
™
v7
contains one quartz-
crystal socket for all microcontroller sockets.
DIP40A
and
DIP40B
sockets are directly
connected to quartz-crystal socket unlike
DIP28
,
DIP20A
,
DIP20B
,
DIP14
and
DIP8
sockets which are connected to it through the pin jumpers (J13-J17). The value of the
quartz-crystal depends on the maximum clock frequency allowed and your application
as well. You can always replace the default 8MHz crystal with another one. If you want to
use microcontrollers in
DIP40A
and
DIP40B
packages, it is necessary to place jumpers
J13-J17 into the I/O position,
Figure 4-5
.The position of jumpers for
DIP28
,
DIP20A
,
DIP20B
,
DIP14
and
DIP8
sockets is shown in
Figure 4-6
to
Figure 4-10
.
Figure 4-6: Position of
the jumpers for DIP28 Figure 4-7: Position of
the jumpers for DIP20A
Figure 4-8: Position of
the jumpers for DIP20B Figure 4-9: Position of
the jumpers for DIP14 Figure 4-10: Position of
the jumpers for DIP8