The following tables show the pin connections used in this application. Table 2-1 shows the pin connections
needed to control movement of the CNC machine on the x-axis while Table 2-2 shows the pin connections used to
control movement on the y-axis. Table 2-3 shows the pin connections used for serial communication using the UART
module.
Table 1. X Axis
| Function |
Pin |
| X Enable |
RA4 |
| Step |
RA5 |
| Direction |
RD7 |
| Limit |
RC7 |
Table 2. Y Axis
| Function |
Pin |
| Y Enable |
RA6 |
| Y Step |
RB4 |
| Y Direction |
RD4 |
| Y Limit |
RA1 |
Table 3. Other Connections
| Function |
Pin |
| UART TX |
RF1 |
| UART RX |
RF0 |
| End Effector |
RF2 |