Useful documents

Datasheets, manuals

Microchip PIC18F46K20: http://ww1.microchip.com/downloads/en/DeviceDoc/41303G.pdf

Microchip PIC18F46K22: http://ww1.microchip.com/downloads/en/DeviceDoc/41412D.pdf

Microchip 25LC1024 (SPI EEPROM): http://ww1.microchip.com/downloads/en/devicedoc/21836a.pdf

Microchip 23K256 (SPI SRAM): http://ww1.microchip.com/downloads/en/DeviceDoc/22100C.pdf

Software libraries

Microchip Application Libraries: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2680&dDocName=en547784