Datasheet

Product data sheet Rev. 4.2 — 18 August 2014 63 of 155

NXP Semiconductors

LPC4350/30/20/10

32-bit ARM Cortex-M4/M0 microcontroller

7.6.1 Features

• Controls system exceptions and peripheral interrupts.

• The Cortex-M4 NVIC supports up to 53 vectored interrupts.

• Eight programmable interrupt priority levels with hardware priority level masking.

• Relocatable vector table.

• Non-Maskable Interrupt (NMI).

• Software interrupt generation.

7.6.2 Interrupt sources

Each peripheral device has one interrupt line connected to the NVIC but may have several

interrupt flags. Individual interrupt flags can represent more than one interrupt source.

7.7 System Tick timer (SysTick)

The ARM Cortex-M4 includes a system tick timer (SysTick) that is intended to generate a

dedicated SYSTICK exception at a 10 ms interval.

Remark: The SysTick is not included in the ARM Cortex-M0 core.

7.8 Event router

The event router combines various internal signals, interrupts, and the external interrupt

pins (WAKEUP[3:0]) to create an interrupt in the NVIC, if enabled. In addition, the event

router creates a wake-up signal to the ARM core and the CCU for waking up from Sleep,

Deep-sleep, Power-down, and Deep power-down modes. Individual events can be

configured as edge or level sensitive and can be enabled or disabled in the event router.

The event router can be battery powered.

The following events if enabled in the event router can create a wake-up signal from

sleep, deep-sleep, power-down, and deep power-down modes and/or create an interrupt:

• External pins WAKEUP0/1/2/3 and RESET

• Alarm timer, RTC (32 kHz oscillator running)

The following events if enabled in the event router can create a wake-up signal from sleep

mode only and/or create an interrupt:

• WWDT, BOD interrupts

• C_CAN0/1 and QEI interrupts

• Ethernet, USB0, USB1 signals

• Selected outputs of combined timers (SCTimer/PWM and timer0/1/3)

Remark: Any interrupt can wake up the ARM Cortex-M4 from sleep mode if enabled in

the NVIC.

7.9 Global Input Multiplexer Array (GIMA)

The GIMA routes signals to event-driven peripheral targets like the SCTimer/PWM,

timers, event router, or the ADCs.