BeagleBoard XM C2, Reference Manual

Page: 70 / 163

REF: BB_SRM_xM
BeagleBoard-xM System
Reference Manual
Revision C2
Page 70 of 163
7.10.9 GPIO Mapping
There are a number of GPIO pins from the processor that are used on the BeagleBoard
design.
Table 5 shows which of these GPIO pins are used in the design and whether they
are inputs or outputs. While GPIO pins can be used as interrupts, the table only covers the
GPIO pin mode. If it is an interrupt, then it is covered in the interrupt section.
Table 5. Processor GPIO Pins
OMAP
PIN
INT/GPIO I/O Signal USAGE
AA9 GPIO_150 O LED_GPIO150 Controls User LED0
W8 GPIO_149 O LED_GPIO149 Controls User LED1
AG9 GPIO_23 I MMC1_WP SD/MMC card slot Write protect
J25 GPIO_170 O DVI_PUP Controls the DVI-D interface. A Hi = DVI-D enabled.
AE21 GPIO_4 I SYSBOOT_5 Used to put the device in the boot mode or as the USER
BUTTON input.
Other signals, such as those that connect to the expansion connector, may also be set as a
GPIO pin. For information on those, refer to the Expansion Connector section.
7.10.10 Interrupt Mapping
There are a small number of pins on the processor that act as interrupts. Some of these
interrupts are connected to the TPS65950 and their status is reflected through the main
TPS65950 interrupt.
Table 6 lists the interrupts.
Table 6. Processor Interrupt Pins
TPS65950
Pin
Processor
PIN
INT/GPIO USAGE
AF26 SYS_nIRQ Interrupt from the TPS65950
AH8 GPIO_29 SD Write protect lead. Can be polled or set to an
interrupt.
P12 GPIO0 MMC1 card detect input. Goes to the processor over the
SYS_nIRQ pin.