Datasheet

06 February 2012 Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW Page 89
© 2012 Broadcom Corporation. All rights reserved
6 General Purpose I/O (GPIO)
There are 54 general-purpose I/O (GPIO) lines split into two banks. All GPIO pins have at
least two alternative functions within BCM. The alternate functions are usually peripheral IO
and a single peripheral may appear in each bank to allow flexibility on the choice of IO
voltage. Details of alternative functions are given in section 6.2. Alternative Function
Assignments.
The block diagram for an individual GPIO pin is given below :
Figure 6-1 GPIO Block Diagram