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Adafruits serial programmer help needed Answered

For anyone that owns the serial port programmer, I need help. Where the plug is (cable plug to the micro circuit) What pins are what? the row thats o o-o-o-o- (1 alone, 4 connected) is the + - - - - - right? and whats miso and mosi then? Help! D:

I don't under stand on the 10 pin clip, what the heck is what. The sites diagram says theres 9 circus, 1 square. well, theres 10 squares!! It also shows near the plus side, the other 4 pins are ground. well, that means the MOSI,(NC)RESET,SCK, and MISO are all connected. Dont think so.

For people who have the circuit

It be nice if u can label the 10 pins for me, thanks



10 years ago

I don't own one, but try this link. It's got the pinouts for the Atmel 10-pin ISP connector. Ladyada referred to it from the serial programmer page, so it must apply to her's, as well.

You should be able to suss out the remaining connections...

Ya i read that 6 times yesterday and its no help. the plugs dont even have 9 circles and 1 square!

No, but can't you figure the orientation from the 4 connected GND pins and the Vcc+ pin? I.E., MOSI is opposite the Vcc+, and the rest follow...


I would be able to if they said what side of that is WHAT. The USBTINYISP from adafruit, doesn't have a 1 or 2 on the 10 pin connector. ALL 10 holes are all squares, no circles. So how the heck can i tell? lol

I hear ya.

I just looked at some IDC connectors I have here, and yes-none have a marked #1 pin. But To some extent, it doesn't matter. If you're using a non-polarized IDC socket and plug (without the notch), you can still insert the plug two ways (one is wrong.)

That leaves two options: you have a polarized socket and plug, or you're connecting directly to the traces and breadboard programming:

-- if you have a polarized socket, the notch faces toward the serial (DB9) connector. It's still possible crimp the plugs wrong on the ribbon cable, of course (in opposite directions.)

You understand that the IDC socket connections on a ribbon cable are automatic--you simply crimp the plugs on the cable. Since they are rows of two, they alternate in order, 1-10.

-- If you're forgoing the socket entirely, try to find the 4 connected traces on the board. They are the only traces connected together. You should be able to follow the traces and find 'em. Once you find the 4, you can identify the rest.

There's a good photo on her site. It looks like an older version, probably for a DB23 serial connector. But the ISP cable connections will be the same. Pin #1 (MOSI) would be the one connected to R4.

Also, Ladyada has a forum on her site--maybe go to the source, and ask her?


10 years ago

Your 10-pin cable has a side with a red stripe. That red wire corresponds to "pin 1" of the cable. On the connector at each the end of the cable, there is also a tiny little triangle (arrow) that points to where pin 1 of the connector is. So, looking at the cable alone, you should be able to figure out where pin 1 is. Next, hook the cable up to the board-- It should only go in one way. Knowing which of the ten pins of the cable is pin 1, you should know which of the ten pins of the PCB is pin 1. Label it on the PCB with an arrow or something. Then, use the diagram. If you know which is pin 1, you know how to orient the diagram, and everything should start to make sense.