Event Captures For Peripheral Wake-Up Capability - Texas Instruments OMAP5912 Reference Manual

3 OMAP5912 Wake-up Capabilities
Table 10. Event Captures for Peripheral Wake-up Capability
Peripheral Event Capture
UART2 Low transition on RX process by the
ULPD module or using GPIO
configuration on the RTS interface
GPIO1, GPIO2, Asynchronous interrupt detection; all
GPIO3, GPIO4 wake-up events per module are merged
into one asynchronous interrupt.
GPIO2 Asynchronous interrupt detection
GPIO3 Asynchronous interrupt detection
GPIO4 Asynchronous interrupt detection
SPI Using GPIO configuration on the all SPI
input pins
2
I C Using GPIO configuration on the all I
interfaces
UART3 Using GPIO configuration on the all
UART3 input pins
McBSP1 Using GPIO configuration on the interface
McBSP2 Using GPIO configuration on the all
McBSP2 input pins
STI (reserved) Using GPIO configuration on the interface
GPTIMER1...8 Can wake up the system when the clock
is configured as 32-kHz through its own
interrupt per general-purpose timer
OS Timer The timer can generate interrupt.
32-kHz watchdog The 32-kHz watchdog can generate reset. NA
Notes: 1) When the wake-up is done through the GPIO, the programmer must ensure that the GPIO direction is set up as
input.
2) Depending on the OMAP5912 configuration before entering into power-down mode, the GPIO can wake either
the entire system or only a specific subsystem.
3) In addition to the wake-up capability mentioned in the above table, several peripherals are also able to generate
their own wake-up request. These requests are merged and sent to OMAP3.2 and the MPU level 2 interrupt
handler as a global wake-up request.
SPRU748A
Table 10 lists the peripherals able to wake up the system and their event
captures. Wake-up can occur either directly or by GPIO.
OMAP5912 Wake-up Capabilities
Receive Capability in Deep Sleep Mode
Provided that the external transmitter
uses the UART2 baud clock, the data is
received properly and captured.
NA
NA
NA
NA
Not able to receive the first data in slave
mode
2
C Not able to receive the first data in slave
mode
Not able to receive the data
Not able to receive the data
Not able to receive the data
Not able to receive the data
NA
NA
Introduction 53