UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
123 of 1441
NXP Semiconductors
UM10503
Chapter 10: LPC43xx/LPC43Sxx Event router
The event router has multiple event inputs from various peripherals. When the proper
edge detection is set in the EDGE configuration register, the event router can wake up the
part or can raise an interrupt in the NVIC.
Each event input to the event router can be configured to trigger an output signal on rising
or falling edges or on HIGH or LOW levels. The event router combines all events to an
output signal which is used as follows:
•
Create an interrupt if the event router interrupt is enabled in the NVIC.
•
Send an interrupt to the NVIC to wake up from WFI induced Sleep mode or
Deep-sleep mode.
•
Wake up from WFE induced Sleep or Deep-sleep mode.
•
Send a wake-up signal to the power management unit to wake up from Deep-sleep,
Power-down, and Deep power-down modes.
•
Send a wake-up signal to CCU1 and CCU2 for turning on wake-up enabled branch
clocks (see
10.4 Event router inputs
Fig 33. Event router block diagram
WAKEUP3:2
WAKEUP1:0
Peripheral interrupts
GIMA outputs 27:26
Reset
NVIC
CREG
Core
PMU
Power regulator
CCU
wake-up
EVENT ROUTER
Events
0 to 19
Table 83.
Event router inputs
Event #
Source
Description
0
WAKEUP0 pin
WAKEUP0 pin. Always active. Use for wake-up from Deep
power-down and all other Power-down modes.
1
WAKEUP1 pin
WAKEUP1 pin. Always active. Use for wake-up from Deep
power-down and all other Power-down modes.
2
WAKEUP2 pin
WAKEUP2 pin. Always active. Use for wake-up from Deep
power-down and all other Power-down modes.
3
WAKEUP3 pin
WAKEUP3 pin. Always active. Use for wake-up from Deep
power-down and all other Power-down modes.
4
Alarm timer peripheral
Alarm timer interrupt. Active whenever the 32 kHz oscillator
is running.
5
RTC peripheral
RTC interrupt and event recorder/monitor interrupt (see
). Active whenever the 32 kHz oscillator is
running.
6
BOD trip level 1
BOD interrupt. Not active in Deep-sleep, Power-down, and
Deep power-down mode. Use for wake-up from Sleep
mode.
