Contents - Raspberry PI Community Projects

Q1 2012 B 1.0 0002
Q1 2012 B Beta Beta Beta Board
Model B Revision 2.0
Based on a new PCB layout that includes previous build fixes from ECN0001 such us
removal of the poly-fuses in series with the +5V power for USB devices, and other fixes
reported by the community such as the erroneous connection of the LAN9512
VDD18CORE pins to the +1V8 power plane, addition of the 8-pin P5 header (nonpopulated)
for extra GPIO pins, addition to the 2-pin P6 header (non-populated) for a
RESET button, and other changes and improvements reported in more detail [1] .
ECN0001
ECN0001 is the request to not fit D14 and replace F1 and F2 with 0 ohm.
D14 Removal
D14 can interfere with some CEC devices if the Pi is left plugged in and unpowered. The
benefits of having it are minimal so it was removed. [2]
F1 & F2 Replacement/Removal
F1 & F2 can cause problems with some USB devices which draw high current. In
particular due to the recovery characteristics of the Poly-fuses, it can take a while to
recover their low resistance state afterwards, adding additional problems for other devices
(lower voltage on the USB bus).
Raspberry Pi Model-A Full Production Board
▪ Announced: Not Yet (as of 16 June 2012)
▪ Board will now have 256Mb of RAM rather than the originally planned
128Mb [3]
▪ Foundation will probably produce a small Beta batch before handing
manufacturing over to RS and Farnell