M I K R O E L E K T R O N I K A S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R T H E E M B E D D E D W O R L D
7
7
page
dsPICPRO
USB
3
dsPICPRO3 User
’
s Manual
MikroElektronika
Development tools
JJ
UU
MM
PP
EE
RR
SS
JUMPERS
Jumpers, like switches, can establish or break a connection between two points. Under a
plastic cover of jumper is a metal contact which makes a connection when you place
jumper between two disconnected pins.
For example, jumper J13 is used to connect or disconnect RS232A Tx line to the RF3 MCU
pin.Connection is made when jumper is placed between two contacts.
Jumpers are more often used as selectors between two possible connections using three pin
connector. As illustrated in Fig. 4. the pin in the middle can be connected to the left or right
pin, depending on the jumper position.
Figure 3.
Figure 4.
Jumper as a
switch
Jumper as a
multiplexer
Jumper is ON
Jumper is OFF
Left line
is selected
All lines are
disconnected
Right line
is selected
