Easy
PIC
for dsPIC30
®
v7
page 9
supported MCUs
Using crystal oscillators
If you want to use microcontrollers in DIP28A, DIP28B, DIP28C and DIP18
packages, it is necessary to put quartz crystal into socket X2 (OSC2). The value of
the crystal depends on the maximum clock frequency allowed and your application.
You can always exchange the default 10MHz crystal with another one.
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
4-3. Then put the microcontroller slowly down until
all the pins match the socket as shown in Figure 4-4.
Check again if everything is placed correctly and press
the microcontroller until it is completely plugged into
the socket as shown in Figure 4-5.
Figure 4-6: RC15 as I/O pin
(when using internal oscillator)
Figure 4-3: Place both ends of microcontroller on
the socket so the pins are aligned correctly
Figure 4-4: with both fingers, evenly distribute
the force and press the chip into the socket.
Figure 4-5: Properly placed microcontroller will
have equally leveled pins.
Figure 4-7: RC15 connected to X1
quartz-crystal
Figure 4-8: RC15, RB6 and RB7 as I/O
pins (when using internal oscillator)
Figure 4-9: RC15, RB6 and RB7
connected to X2
quartz-crystal
How to properly place your microcontroller into the DIP socket?
1
2
3
IMPORTANT:
PIC microcontrollers normally use a quartz crystal for the purpose of providing
clock frequency. The EasyPIC
™
v7 for dsPIC30
®
provides two sockets for
quartz-crystal. Microcontrollers in DIP40A and DIP40B packages use socket
X1 (OSC1) for quartz-crystal.
