BeagleBone BBONEBLK_SRM, Справочное руководство

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REF: BBONEBLK_SRM
BeagleBone Black System
Reference Manual
Rev A5.2
Page 81 of 108
8.0 Cape Board Support
The BeagleBone Black has the ability to accept up to four expansion boards or capes that
can be stacked onto the expansion headers. The word cape comes from the shape of the
board as it is fitted around the Ethernet connector on the main board. This notch acts as a
key to insure proper orientation of the cape.
This section describes the rules for creating capes to insure proper operation with the
BeagleBone Black and proper interoperability with other capes that are intended to co-
exist with each other. Co-existence is not a requirement and is in itself, something that is
impossible to control or administer. But, people will be able to create capes that operate
with other capes that are already available based on public information as it pertains to
what pins and features each cape uses. This information will be able to be read from the
EEPROM on each cape.
This section is intended as a guideline for those wanting to create their own capes. Its
intent is not to put limits on the creation of capes and what they can do, but to set a few
basic rules that will allow the SW to administer their operation with the BeagleBone
Black. For this reason there is a lot of flexibility in the specification that we hope most
people will find liberating and in the spirit of Open Source Hardware. I am sure there are
others that would like to see tighter control, more details, more rules and much more
order to the way capes are handled.
Over time, this specification will change and be updated, so please refer to the latest
version of this manual prior to designing your own capes to get the latest information.