The modulator signal can be supplied from the following sources selected with the SRCS bits:
| SRCS<3:0> | Connection |
|---|---|
| 1011-1111 | Reserved |
| 1010 | MSSP1 - SDO |
| 1001 | EUSART1 TX (TX/CK output) |
| 1000 | EUSART1 RX (DT output) |
| 0111 | CMP2 OUT |
| 0110 | CMP1 OUT |
| 0101 | PWM4 OUT |
| 0100 | PWM3 OUT |
| 0011 | CCP2 OUT |
| 0010 | CCP1 OUT |
| 0001 | MDBIT |
| 0000 | Pin selected by MDSRCPPS |