![]() ![]() The programming header is used to program a target board using ICSP (in circuit serial programming). It charges and discharges the capacitors C8 – C10 by toggling the signals on Pump1 and Pump2 Programming header P1 On top of the schematic you see the voltage pump which converts the 5V of VDD to 12V on VPP. The controller connects to the PC by USB. The firmware is described on the Embedded page. Components MicrocontrollerĪ PIC18f2550 has been used to convert the USB commands to logical levels on the programming header. The hardware (from version 0.3) is capable of creating levels for PIC24 / PIC33 / PIC18FXXJXX devices as well. ![]() ![]() The interface to the target PIC processor uses TTL levels (0 and 5 volts) which limits the hardware to the PIC10, PIC12, PIC16, PIC17, PIC18 and dsPIC30 series of processors. The PCB files are available in Gerber format and the schematic in pdf in the download section so that you can open them with your favourite tool.Ĭlick on the schematic below to have a larger view (PDF). The schematic and PCB have been designed in Kicad, an open source EDA solution The hardware is built around a microchip PIC18F2550, this microcontroller has on board USB capabilities. ![]()
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