timers-005
Interrupts
sources
GPTi.TISR
Timer wakeup
GPTi.TWER
MAT_IT_FLAG
GPTi.TIOCP_CFG
ENAWAKEUP
OVF_IT_FLAG
TCAR_IT_FLAG
MAT_WUP_ENA
OVF_WUP_ENA
TCAR_WUP_ENA
Public Version
General-Purpose Timers
www.ti.com
Figure 16-5. Wake-Up Request Generation
The timer wake-up enable register (GPTi.
) allows masking the expected source of the wake-up
event that generates a wake-up request. The GPTi.
register is programmed synchronously with the
interface clock before the PRCM module sends an idle mode request. The expected source of the
wake-up event is an overflow (GPTi.
), a timer match (the compare result of GPTi.
and
matches the counter value), and a timer capture (an external pulse transition of the correct
polarity is detected on the GPTi_EVENT_CAPTURE).
When the wake-up event is issued, the associated interrupt status bit is set in the timer status register
(GPTi.
). The pending wake-up event is reset when the set status bit is overwritten by 1.
NOTE:
The status bit must be reset to re-enter idle mode.
16.2.3.1.3 Reset and Power Management
GPTIMER1 belongs to the WKUP power domain. As part of that domain, this GP timer is sensitive to a
WKUP_RST signal issued by the PRCM module. For further details about the WKUP power domain
implementation and the WKUP_RST signal, see
, Power, Reset, and Clock Management.
GPTIMER2 through GPTIMER9 belong to the PER power domain. As part of that domain, these GP
timers are sensitive to a PER_RST signal issued by the PRCM module. For further details about the PER
power domain implementation and the PER_RST signal, see
, Power, Reset, and Clock
Management.
GPTIMER10 and GPTIMER11 belong to the CORE power domain. As part of that domain, these GP
timers are sensitive to a CORE_RST signal issued by the PRCM module. For further details about the
CORE power domain implementation and the CORE_RST signal, see
, Power, Reset, and
Clock Management.
16.2.3.2 Software Reset
Two bit fields (GPTi.
[1] SFT) can generate a software reset
of the GP timer. For both of these bits, all read accesses return 0.
The GPTi.
[1] SOFTRESET bit allows resetting the functional and interface domains. The
[1] SFT bit allows resetting the functional part of the GP timer.
Before accessing or using the GP timer, the local host must ensure that both internal resets are released
by reading the GPTi.
[0] RESETDONE bit. This bit field monitors the internal reset status.
2710
Timers
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
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