BadFET20
The BadFET20 is the fourth hardware revision of the GoodFET, and it shares a board with the GoodFET20. It differs from the GoodFET20 in that its microcontroller is a more powerful MSP430F2618 running at 16MHz by an internal oscillator.
CAD Files
Eagle CAD 5.x files for the design can be found in /branches/goodfet20 of the subversion repository, or as goodfet20.zip. The GoodFET20 and the BadFET20 use identical boards; they only differ in the choice of components.
Bill of Materials
| Quantity | Package | |
| 1 | SSOP28 | FT232RL |
| 1 | QFP64 | MSP430F2618 |
| 2 | 0603 | 0.1μF Decoupling Capacitors |
| 3 | 0603 | LED |
| 2 | 0603 | 330R LED Series Resistors |
| 6 | 0603 | 100R JTAG Series Resistors |
| 1 | 0603 | 47K !RST Pull-up Resistor |
| 1 | SO16 | 74HC4053 Analog MUX |
Construction
Construct as described on the following Flickr image's annotations,
using a 2618 in lieu of the 1612. Omit the row of pull-up resistors.
Errata
The GoodFET20 documentation used to indicate that adding an 8MHz crystal would suffice to convert a GoodFET to a BadFET. That was incorrect, and an MSP430F2618 is required.
Thanks to Kenny for reporting that the 47K pull-up resistor was missing from the BOM. This has since been corrected.
Most 74HC4053 chips do not function at 3.3V. For glitching research, please use the GoodFET21 instead.