Microchip’s 16F877A 8‑Bit Proces­sor. 8K of pro­gram space and 33 I/O lines, 8 of which are 10bit Ana­log to Dig­i­tal con­vert­er capa­ble. Runs up to 20MHz with exter­nal crys­tal. Pack­age can be pro­grammed in cir­cuit.Doc­u­ments:16F877A DatasheetPro­gram­ming PICs using Lin­ux