| signal | | signal |
|---|---|---|
| BOD sense | Probe pulse | |
| filtered current sense | unfiltered current sense | |
| Serial memory data | resonator | |
| nc | resonator | |
| GND | Vcc +5 | |
| DCC in | driver register data | |
| Loconet in | driver register shift and serial memory clock | |
| Loconet out | driver register latch | |
| Probe Register latch | Probe Register shift | |
| signal | name | pin | pin | name | signal |
|---|---|---|---|---|---|
| GAL k0 | RA2/AN2/Vref | 1 | 18 | RA1/AN1 | GAL k1 |
| filtered current sense | RA3/AN3 | 2 | 17 | RA0/AN0 | unfiltered current sense |
| Serial memory data | RA4 | 3 | 16 | RA7/OSC1/CLKIN | resonator |
| Loconet CD | RA5(input only) | 4 | 15 | RA6/OSC2/CLKOUT | resonator |
| Gnd | Vss | 5 | 14 | Vdd | +5 |
| DCC in | RB0/Int | 6 | 13 | RB7 | driver register data / D7 |
| Loconet in | RB1/Rx | 7 | 12 | RB6 | driver register shift / serial memory clock/ D6 |
| Loconet out | RB2/Tx | 8 | 11 | RB5 | driver register latch / D5 |
| Probe Register latch / D3 | RB3 | 9 | 10 | RB4 | Probe Register shift / D4 |