The SBC28PC is a single board computer for 28 pin PIC microcontrollers. It has a RS232 serial port, and
socket for a MCP2551 CAN Bus driver chip (for PIC chips that have a CAN Bus).
The RS232 is available via a 3 pin molex connector, and a 5 pin 3.81mm terminal block connector(configured via solder jumpers).
When the CAN BUS driver chip is inserted, the CAN signals are available on
the 5 pin terminal block connector (RS232 is only on 3 pin molex connector in this case).
Some examples of 28 pin DIP PIC chips that this board is designed for (There are many more!):
The following new PIC chips with CAN Bus can also be used. A small hardware modification is required. A 10uF 16V capacitor
must be soldered between pin 6 and 8 of the PIC on the bottom of the board. We can do this free of charge on request. A very small
ceramic capacitor is used, that is barely noticeable. Daughter board pin A4 is not available for this mode(Vcap pin with capacitor connected to it).
We recommend using a 16MHz crystal for this version, seeing that this will allow full 64MHz operation of PIC chip.
When using this board with the CAN driver chip, it must be used with a PIC chip that has an onboard
CAN peripheral, like the PIC18F248, PIC18F258, PIC18F2680.... chips.
This board can also be used with the PIC18F2550 PIC with built in USB. In this case, a USB socket has to be
added (on a prototype Daughter or Frontend board for example).
By default these boards don't have a crystal assembled. A Crystal is not required seeing that
all PIC chips have built in crystals. Typically the built in crystal is 4MHz or 8MHz. If a
higher or special clock rates is required, it can be selected via the options below. For example,
if this board is going to be used to communicate at a standard BAUD rate (9600, 19200, 38400,
57600, 115200...), then the 18.432MHz crystal should be selected below. With this crystal, the
exact BAUD rate can be obtained with 0% error.
The SBC28PC's Daughter and Frontend Connectors can be used as expansion ports
to add additional functionality.
It contains all free CPU port pins, power, I2C, SPI, RS232 signal,.....
For further details about the Daughter and Frontend Expansion Port,