PIC-P40 development board
Users Manual
All boards produced by Olimex are ROHS compliant
Rev.E, February 2008
Copyright(c) 2008, OLIMEX Ltd, All rights reserved
Page 1
INTRODUCTION:
PIC-P40 board is development board, which allow you to prototype and
develop code for all Microchip’s PIC microcontrollers with 40 pins.
What you can do with PIC-P40? A lot of stuff let’s see what we have:
PIC-P40 have RS232 connector and driver, so you can interface your
PIC microcontroller to other embedded or PC with RS232. The RS232
driver have 4 lines Tx, Rx, CTS and jumper selectable RTS or DTR.
The pin labeled RX is output and should be connected to PIC UART Tx.
The pin labeled TX is input and should be connected to PIC UART Rx.
Note that MAX232 driver on the socket is 5V device, so if you decide
to run your PIC on 3.3V you should replace it with MAX3232 which
works on 3.3V
The on-board ICSP connector allow you to program the PIC on the
board without pulling it of the socket, by ICSP programmer like PIC-
MCP, PIC-MCP-USB, PIC-PG1, PIC-PG2, PIC-PG3, PIC-PG4 or to
program and debug it with PIC-ICD2, PIC-ICD2-POCKET or PIC-ICD2-
TINY.
IMPORTANT: all programmers provide power supply through
ICSP connector during the programming PIC-P40 should not be
powered via the external power jack!
The power supply circuit have diode bridge after the power supply jack
which allow you to power this board with both AC and DC power
supply adapters. The input voltage could be anything within the range
+7.5 – 15V DC or 6-12V AC.
Voltage regulator is made with LM317 adjustable voltage regulator and
have jumper which selects what voltage you supply to the PIC
microcontroller +3.3V or +5V, so you can work with PICs on both low
and normal voltage.
The oscillator circuit is made with 20 Mhz crystal oscillator, so you
can run your PIC at maximum performance.
The RESET circuit is made with simple RC circuit and RESET push
button, the reason to not use RESET IC is that the board should
support both 3.3V and 5V operation while RESET ICs are on fixed
voltage.
PIC-P40 have user button for user input connected to PIC
microcontroller’s RE2 port. When RE2 port is initialized as INPUT you
will read “0” when the button is pressed and “1” when it is depressed.
Status LED is connected via jumper to PIC microcontroller’s RA0 port.
When your RA0 port is initialized as OUTPUT and set to “0” LED will
go ON, when RA0 port is set to “1” LED will go OFF.
PIC-P40 have handy GND pin for connection to oscilloscope.
Page 2
Page 3
FEATURES:
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•
•
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ICSP/ICD connector for programming and debugging
RS232 interface with MAX232 IC on socket
DIL40 microcontroller socket
Quartz crystal 20Mhz
LED to RA0 through jumper
user Button to RE2
Reset button and circuit
Power plug-in jack, accept AC and DC input
selectable +3.3V / +5V power supply voltage regulator (3.3V when jumper is
closed)
Extension slot on every uC pin
Gird 100 mils
GND bus
Vcc bus
Four mounting holes 3,3 mm (0,13")
FR-4, 1.5 mm (0,062"), green soldermask, white silkscreen component print
Dimensions 100x80 mm (3,9x3,15")
Page 4
PWR
IN
ADJ
OUT
G1
VR1
LM317
+5V
B-DIL
SCHEMATIC:
240/1%
R2
C6
100n
C8
100uF/16VDC
10K
R4
ICSP
C7
470uF/16VDC
D1
390/1%
3.3V
RST
NA
100n
100n
C13
C12
C11
1N4004
R3
330/1%
U1
LED_J
1
MCLR#/THV
VDD
1
2
3
4
5
6
R5
11
32
+5V
2
1
C2
U2
C1+
V+
C1-
V-
C2+
C2-
5
4
3
1
Page 5
+5V
C4
4.7uF/25VDC
330
LED
R6
10k
C5
4.7uF/25VDC
CTS
BUT
C10
22p
RX
TX
C9
22p
Q1
4-20MHz
R1
2
3
4
5
6
7
8
9
10
T1IN
T1OUT
T2IN
T2OUT
R1OUT
R1IN
R2OUT
R2IN
11
10
12
9
4.7uF/25VDC
RB3/RB5
1
2
3
2
C3
6
4.7uF/25VDC
RS232
RA0/AN0
RA1/AN1
RA2/AN2
RA3/AN3
RA4/T0CKI
RA5/AN4
RE0/RD#/AN5
RE1/WR#/AN6
RE2/CS#/AN7
PGD/RB7
PGC/RB6
RB5
RB4
PGM/RB3
RB2
RB1
INT/RB0
40
39
38
37
36
35
34
33
J3
6
7
8
9
1
2
3
4
5
14
7
13
8
J2
3
MAX232
16
U2P
GND
15
VCC
2
1
+5V
RTS/DTR
C1
13
14
15
16
17
18
19
20
12-RTS
23-DTR
PIC-P40
Rev. E
COPYRIGHT(C) 2008, Olimex Ltd.
http://www.olimex.com/dev
OSC1/CLKIN
OSC2/CLKOUT
RC0/T1OSO
RC1/T1OSI
RC2/CCP1
RC3/SCK
RD0/PSP0
RD1/PSP1
VSS
PSP7/RD7
PSP6/RD6
PSP5/RD5
PSP4/RD4
RX/RC7
TX/RC6
SDO/RC5
SDI/RC4
RD3/PSP3
RD2/PSP2
30
29
28
27
26
25
24
23
22
21
12
31
PIC16F87SS
