Specifications

General Purpose Input Output (GPIO)
ARM DDI 0287B Copyright © 2004, 2006 ARM Limited. All rights reserved. 9-3
9.2 Functional description
Figure 9-1 shows the PrimeCell GPIO control circuit and external interfaces for one of
the four GPIO interfaces.
Figure 9-1 GPIO output control
The GPIO interrupts to the VIC are:
6 GPIO0
7 GPIO1
8 GPIO2
9 GPIO3.
GPIO
nGPEN[7:0]
XP[7:0]
GPOUT[7:0]
GPIN[7:0]
GPAFOUT[7:0]
GPAFIN[7:0]
GPIN[7:0]
Input/
output
control
1
0
nGPIODIR[7:0]
nGPAFEN[7:0]
1
0
GPIODATA[7:0]
Mode control register
GPIOAFSEL
ARM926EJ-S Dev Chip
CORE APB
HIGH
HIGH
Not
used