This is an adapter to convert an SPI based (AVR ISP) programmer so that it can perform PDI programming. The two resistors are both 220Ω. The adapter connects both MOSI and MISO (each through a resistor) to PDI_DATA, SCK to PDI_CLOCK/!RESET, and Vcc and Ground on both ends. The programmer’s !RESET pin is not connected.

Note that the programmer will likely require a firmware update as well as additional support added to avrdude for this to work properly.

This is an RS-232 SAO for #DEFCON #badgelife

All caps are 0.1µF. All resistors are 68Ω. The chip is a MAX3232. Mount the keyed shrouded 2x3 .1" DIP header on the bottom. Mount a DB9M on the edge.

The ATXMega chips are not available as through-hole devices. The ATXMega32E5 is a high powered substitute for the ATMega328P made famous by Arduino. This breakout board brings out all pins except port R (but instead adds footprints for a 1206 crystal) and the analog Vcc and ground (hooked together with bypass caps to digital Vcc and ground). In addition to breaking out the two PDI pins, a standard 2x3 PDI programming interface footprint is on the board.

Note that this is not a 5 volt tolerant chip.

This version adds the recommended bypass/filtering components to the analog Vcc pin.

• C1 & C2 - 0.1µF 0805
• C3 & C4 - 15 pF 0805
• C5 - 10 µF 0805
• L1 - 400Ω ferrite bead
• R1 - 10 kΩ 0805
• X1 - 32.768 kHz 1206
• And, of course, IC1 is an ATXMegannE5

This is a super-cheap adapter for standard AVR ISP programmers to projects on a breadboard.

Install a shrouded 2x3 header on the top side, and a 1x6 SIP header on the bottom side. Plug the SIP header into your breadboard and connect a standard 6 pin ISP cable to the shrouded jack.

You can also use it for PDI. In this case, hook up Vcc and GND as usual, then connect !RESET to !RESET/PDI-C and MISO to PDI-D.