Arduino Mega ICSP pinout

Question

Hi,

Arduino Mega (also Uno) has a separate block of pin-holes called ICSP. I believe this is for connecting Arduino as a programmer? However I am confused about pin numbering of this ICSP block. I.e. Mega pinout pictures provided on internet show ICSP pin-holes horizontally on the board, but vertically on the side picture. So, which pin is 1, 2 and so on?

Former Member · Accepted Answer

Looking at the photos on the arduino site like http://arduino.cc/en/uploads/Main/ArduinoMega2560_R3_Front.jpg

pin 1 has a small dot on the silk screen next to it, pin2 is to the right of pin 1 in that photo. Your diagram also shows the dot next to pin1, so that's your reference point between the two.

Many pcb's also have a square pad to denote pin 1, but it seems that the Arduino folks don't do that which is slightly unfortunate