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 PICMCP, 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-ICD2TINY. 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.
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FEATURES:
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•
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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
Page 5
6
7
8
9
1
2
3
4
5
12-RTS
23-DTR
2
1
J2 3
4.7uF/25VDC
C3
14
7
13
8
C2-
C2+
C1-
C1
16VCCU2P GND15
+5V
MAX232
T1IN
T1OUT
T2IN
T2OUT
R1OUT
R1IN
R2OUT
R2IN
V-
V+
11
10
12
9
5
4
3
1
RTS/DTR
TX
RX
CTS
C5
4.7uF/25VDC
C4
4.7uF/25VDC
C10
22p
C9
22p
R4
330
Q1
4-20MHz
LED
http://www.olimex.com/dev
COPYRIGHT(C) 2008, Olimex Ltd.
Rev. E
U1
13
14
15
16
17
18
19
20
2
3
4
5
6
7
8
9
10
1
VDD
OSC1/CLKIN
OSC2/CLKOUT
RC0/T1OSO
RC1/T1OSI
RC2/CCP1
RC3/SCK
RD0/PSP0
RD1/PSP1
VSS
RA0/AN0
RA1/AN1
RA2/AN2
RA3/AN3
RA4/T0CKI
RA5/AN4
RE0/RD#/AN5
RE1/WR#/AN6
RE2/CS#/AN7
MCLR#/THV
100n
LED_J
C11
C12
100n
NA
R1
10K
C13
PIC-P40
BUT
R6
10k
+5V
RST
C8
100uF/16VDC
2
1
6
R5
2
330/1%
R3
C1+
390/1%
U2
3.3V
C6
100n
R2
30
29
28
27
26
25
24
23
22
21
40
39
38
37
36
35
34
33
PIC16F87SS
PSP7/RD7
PSP6/RD6
PSP5/RD5
PSP4/RD4
RX/RC7
TX/RC6
SDO/RC5
SDI/RC4
RD3/PSP3
RD2/PSP2
PGD/RB7
PGC/RB6
RB5
RB4
PGM/RB3
RB2
RB1
INT/RB0
D1
4.7uF/25VDC
OUT
ADJ
+5V
1N4004
C2
IN
VR1
LM317
240/1%
+5V
C7
470uF/16VDC
B-DIL
G1
11
32
RS232
PWR
1
2
3
ICSP
J3
1
2
3
4
5
6
SCHEMATIC:
RB3/RB5
12
31
SOFTWARE:
DEMO1:
PIC16F877-I/P
BLINK LED
This is demo code which blinks the LED on PIC-P40 board.
Note:
LED jumper should be closed!
DEMO2:
PIC16F877-I/P
BUTTON read
This is demo code which show how to read BUTTON status and to switch
the LED ON when button is pressed and LED off when the button is
depressed.
DEMO3:
PIC16F877-I/P
RS232 send / receive routines
This is demo code, which show how to use the USART to send and receive
characters from host PC via RS232 cable.
The MAX232 by default is not connected to PIC on the board so you have to
solder two wires – one from RC6 (pin #25) of PIC16F877 Tx signal to
MAX232 Rx labeled pin, and second from RC7 (pin #26) of PIC16F877 Rx
signal to MAX232 Tx labeled pin.
You must program the HEX code to PIC16F877 and run the code.
If you programmed the PIC correctly and wired the UART, when you open
Hyperterminal on your host PC computer with 9600 bps, 8 data bit, 1 stop
bit, No flow control and apply power supply to the PIC-P40 every character
you type on the hyperterminal will be printed back with “*” i.e. if you type
“abc” you will receive “a*b*c*”.
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ORDER CODE:
PIC-P40 – assembled and tested (no kit, no soldering required)
PIC-P40/PCB – blank PCBs only
How to order?
You can order to us directly or by any of our distributors.
Check our web www.olimex.com/dev for more info.
Revision history:
REV. E
- create February 2008
Page 7
Disclaimer:
© 2008 Olimex Ltd. All rights reserved. Olimex®, logo and combinations thereof, are registered trademarks of
Olimex Ltd. Other terms and product names may be trademarks of others.
The information in this document is provided in connection with Olimex products. No license, express or implied
or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Olimex
products.
Neither the whole nor any part of the information contained in or the product described in this document may be
adapted or reproduced in any material from except with the prior written permission of the copyright holder.
The product described in this document is subject to continuous development and improvements. All particulars of
the product and its use contained in this document are given by OLIMEX in good faith. However all warranties
implied or expressed including but not limited to implied warranties of merchantability or fitness for purpose are
excluded.
This document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for
any loss or damage arising from the use of any information in this document or any error or omission in such
information or any incorrect use of the product.
Page 8
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