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The Willette programmer is a stand-alone programmer for the MC68HC908GP processor. The power is obtained from a PC serial port. The board is 2.25 inches by 2.25 inches (57mm x 57mm). It has a ZIF socket for the processor and a ICP header for target board programming. The complete kit was $30US. The programmer group buy is over.
Note that MegaSquirt® partial kits come with the processor pre-programmed. You do not need the Willette program to run MegaSquirt® or perform standard upgrades on these processors. However, if you purchase a blank chip from any other supplier than the group buy, or if you want to extensively rework the MegaSquirt® code, you need this programmer.
| Qty. | Part | Description |
| 4 | D1, D2, D3, D4 | 1N4001 diode |
| 1 | Z1 | 1N5200 5.6 Volt Zener diode |
| 2 | C1, C2 | 0.1µF capacitor |
| 4 | C4, C5, C6, C7 | 1.0µF capacitor |
| 3 | R1, R2, R3 | 1 kOhm resistor |
| 1 | R4 | 10 kOhm resistor |
| 1 | OSC | 19.6608 MHz oscillator |
| 1 | Q1 | ZTX450 NPN transistor |
| 1 | MAX232 | MAX232N serial chip |
| 1 | DB9F | DB9 PCB connector (female) |
Note also that Patrick Carlier also has designed a programmer for the 68HC908. His programmer was designed to program the Motorola MC68HC908GP32 micropocessor, in combination with a personal computer, and the progsz08 free software by P&E micro systems. It was developed for the MegaSquirt® group and its offspring, although it can be used for any MC68HC908GP32 based project.
Features are :
More information is in the MegaProgrammer manual which can be downloaded as a zipped .pdf [megaprog.zip] from the files section of the MegaSquirt® Forums.
Patrick can provide PCBs, partial kits, full kits and assembled and tested kits. Contact Patrick at p.carlier@pandora.be for ordering details.
Another alternative, for those wanting a fully assembled programmer, is the Motorola 68HC908 Programmer from Futurlec for $49. Don't forget that you will also require the 68HC908GP32 Adaptor on the same page, for $16.