← Raspberry Pi P5 Header
And just to make the picture complete with the I2C bus:
– pin 3: SDA1
-pin 5: SCL1
(pull up resistors 1K8 are foreseen on the RPi pcb)
4, 9, 14, 17, 20 and 25 used to be “do not connect”. Is it now safe to use them?
A number of Raspberry Pi Foundation people have said they are now fixed so are safe to assume their final function. A few of the pin assignments changed between Rev 1 and Rev 2 designs but I doubt anything else will change. They have stated that their focus is improving software support not additional hardware changes.
Nice Pin Plan.
I orderd my Raspberry Pi very early so have revision 1 — can someone point out to me
1) what the pin are for R1 and
2) what are the differences between R1 and R2?
Take a look at the Simple Guide to the RPi GPIO Header and Pins page. This has diagrams for both revisions.
and remember kids…
Rev 1 boards use I2C bus 0 ,
Rev 2 boards use I2C bus 1
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