© Gooligum Electronics 2015
www.gooligum.com.au
Baseline and mid-range PIC training and dev board operation guide
Page 8
Jumper summary
As described above, jumpers are used to configure each function, bringing different elements in or out of
the circuit. Although the function of each jumper is annotated on the PCB overlay, here is a summary of
what each jumper is used for:
Jumper
Position Function
JP3
-
Enables external pull-up resistor on
GP3 / RA3 / RB3 /
MCLR
JP4
1
Connects
RC3
to LED digits segment D
2
Connects
RC4
to LED digits segment C
3
Connects
RC2
to LED digits segment B
4
Connects
RC1
to LED digits segment A
5
Connects
RA1 / RB1
to LED digits segment F
6
Connects
RA0 / RB0
to LED digits segment G
JP5
1
Connects
RA4 / RB4
to LED digits segment E
2
Connects
RA2 / RB2
to LED digits segment E
JP6
1-2
Connects common cathode of LED digit 1 to ground
2-3
Connects common cathode of LED digit 1 to transistor controlled by
RC5
JP7
-
Enables external pull-up resistor on
GP2 / RA2 / RB2
JP8
-
Connects
RC5
to transistor on LED digit 1
JP9
-
Connects
RA5 / RB5
to transistor on LED digit 2
JP10
-
Connects
RC0
to transistor on LED digit 1
JP11
Connects
GP0 / RA0 / RB0
to LED L1
JP12
Connects
GP1 / RA1 / RB1
to LED L2
JP13
Connects
GP2 / RA2 / RB2
to LED L3
JP14
Connects
GP4 / RA4 / RB4
to LED L4
JP15
Connects
GP5 / RA5 / RB5
to LED L5
JP16
Connects
RC0
to LED L6
JP17
Connects
RC1
to LED L7
JP18
Connects
RC2
to LED L8
JP19
Connects
RC3
to LED L9
JP20
1
Connects
OSC1
to 10 kΩ resistor and 82 nF capacitor (RC oscillator)
2
Connects
OSC1
to 32.768 kHz watch crystal (LP oscillator)
3
Connects
OSC1
to 4.00 MHz ceramic resonator (XT oscillator)
4
Connects
OSC1
to 32.768 kHz external clock (EC mode)
JP21
1
Connects
OSC2
to 4.00 MHz ceramic resonator (XT oscillator)
2
Connects
OSC2
to 32.768 kHz watch crystal (LP oscillator)
