From the data sheet i got:
| Pin Name | Pin Number PDIP,SOIC | Pin Type | Buffer Type | Description |
| | | |
OSC1/CLKI OSC1 CLKI | 9 | I I | Analog Analog | Oscillator crystal or external clock input. Oscillator crystal input or external clock source input. External clock source input. Always associated with pin function OSC1. (See OSC2/CLKO pin.) |
| | | |
OSC2/CLKO/RA6 OSC2 CLKO RA6 | 10 | O O I/O | — — TTL | Oscillator crystal or clock output. Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode. In select modes, OSC2 pin outputs CLKO which has 1/4 the frequency of OSC1 and denotes the instruction cycle rate. General purpose I/O pin. |
Having read that, the language is confusing me a little, when it says "OSC1(pin 9): Oscillator crystal input" does that mean i should line it up with the input side of the oscillator crystal? or should i line it up with the output side of the oscillator crystal so the electrical signals outputting from the oscillator are being "input"ted into pin 9?