Step 2: Connect USB
Coridium provides boards that allow easy connection
to a BASICchip (PROstart and BASICboard). With the BASICboard having the
BASICchip in a socket. But you can also program a BASICchip in your own
system, providing 2.5 to 3.3V power and 3 signal connections.
For reference the minimal connections for the BASIC chip are
power (supplied from a 78L33 or similar, with adequate bypass caps) and
connections for RESET, TXD0 and RXD0. These are all that are needed to
program the part from BASICtools.
Below an illustration using the FTDI serial cable
. This setup uses the 5V from the cable and a
78L33 to generate 3.3V. You should add bypass capacitors between power and