Microchip PIC Board, RS232, 28-pin PICs

Description

Compact Board for 28-pin Microchip PIC microcontrollers. It features an RS232 serial interface that is available via a standard 9-pin male D-Sub connector. The board ships completely assembled and tested. (The image to the right shows a PIC microcontroller installed, but one is
not
included. You may purchase compatible PICmicros using links provided below.)
PIC RS232 Board Features
Compact Daughter Board connector and a Frontend connector for expansion capability. (The image to the right shows a version of the board without Frontend connector installed.)
22 I/O ports (when using common PIC chips like the PIC16F876A or PIC18F252)
28-pin DIP socket for PIC microcontroller
18.432 MHz Crystal
Diode-protected 2.1mm power connector for standard DC transformer.
Wide operating voltage range from 7 – 30V DC (7.5V or 9V DC supply recommended).
RS232 transceiver chip with +/- 15kV ESD protection.
Standard 9 pin, D-Sub male connector with RS232 signals, ground and external power. For connection to a PC you will need an RS232 Null Modem cable with RX/TX and RTS/CTS lines crossed. Such a Null Modem cable is offered as an add-on option at the bottom of this page
Power LED to indicate when device is powered.
In-Circuit Serial Programming (ICSP) Connector (ICPC1 type)
6-pin Micro-MaTch socket with Power, I2C and SPI signals. The Micro-MaTch connector can be used to daisy-chain multiple I2C devices together.
The power pin on the 5-pin terminal block connector can be connected to the board's unregulated power supply (the input of the 2.1mm power connector) via a jumper. This can be used to obtain power for this board. When used, no power needs to be supplied via the 2.1mm power connector; it will obtain power via the D-Sub connector.
Supported PIC Microcontrollers
The board has been optimized for use with 28-pin PIC microcontrollers that have an integrated UART interface, for example:
PIC18F242, PIC18F252, PIC18F248,
PIC18F258
PIC18F2320, PIC18F2410, PIC18F2680 (CAN BUS), PIC18F2550 (USB)
PIC16F870, PIC16F873(A),
PIC16F876(A)
PIC16C63, PIC16C66, PIC16C73(A), PIC16F73, PIC16C76, PIC16F76
However, it can also be used with most other 28-pin DIP PIC chips, as long as their power, reset (MCLR) and oscillator pin locations are in the same position as with the chips listed above. If a 28-pin PIC without hardware UART is used, the UART function can be implemented optionally in software.
Build an Enclosed System
Using the Compact Daughterboard connector, this RS232 board can be used as a control module for the
Input-Output-Relay Board
, which comes in a sturdy enclosure. You also can make a fully enclosed system by connecting this board to the
Add-on Prototyping Board with 10 I/O Ports
or the
Add-on Prototyping Board with 24 I/O Ports
, each of which comes in an enclosure.