Bot Thoughts: AVRISP and JTAG ICE MkII Pinout

So, you lucky soul, you have a Atmel JTAG ICE Mk II on the bench. Can't remember the pinout for the AVRISP port? Or the color codes on the squid cable? Me either. How are you going to program your Atmega microcontroller now? With this reference guide.

This table shows color, AVRISP pin, and ATmega328P pin corresponding to MISO, MOSI, SCK, RESET, Vcc and GND.

Squid			ISP		ATmega
Function	Squid Pin #	Color	Function	6-pin AVRISP Pin #	328P Pin
TCK	1	Black	SCK	3	19
GND	2	White	GND	6	8,22
TDO	3	Grey	MISO	1	18
VTref	4	Purple	Vcc	2	7
TMS	5	Blue	nc	nc	nc
nSRST	6	Green	RESET	5	1
Vsupply	7	Yellow	nc	nc	nc
nTRST	8	Orange	nc	nc	nc
TDI	9	Red	MOSI	4	17
GND	10	Brown	nc	nc	nc

Here's the AVRISP pinout diagram for both the 6-pin and 10-pin AVRISP header. Even if you're not using a JTAG ICE (I often use a Pololu USB programmer) this comes in handy when you want to plug the AVRISP header into a breadboard.

If you're using a 28-DIP ATmega328P, this pinout diagram may help. This should work for an ATmega8, ATmega48, ATmega88, ATmega168, and other 28-pin ATmega AVR microcontrollers (check the datasheet).

This diagram shows AVRISP pinout diagram for programming ATtiny2313, ATtiny2313A, ATtiny4313 AVR microcontrollers.

An easier way to program your ATtiny2313 (or ATtiny4313) is to use one of my eeZee Big Tiny target boards on Tindie. Program with FTDI and 6-pin AVRISP headers. Includes 16MHz crystal onboard. Hust hook it up and program

Here's a pinout diagram for an 8-DIP ATtiny11, ATtiny12, ATtiny13, ATtiny25, ATtiny45, ATtiny85, and other 8-pin Atmel ATtiny AVR microcontrollers (check the datasheet).

An easier way to program your ATtiny13 is to use one of my eeZee Tiny prototyping boards, available on Tindie. The 6-pin AVRISP header is provided, just hook it up and program.