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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
116 of 1441
NXP Semiconductors
UM10503
Chapter 9: LPC43xx/LPC43Sxx Nested Vectored Interrupt Controller
9.4 General description
The Nested Vectored Interrupt Controller (NVIC) is an integral part of the Cortex-M4 and
M0. The tight coupling to the CPU allows for low interrupt latency and efficient processing
of late arriving interrupts.
Refer to the Cortex-M4 User Guide for details of NVIC operation.
9.5 Pin description
9.6 Interrupt sources
lists the interrupt sources for each peripheral function. Each peripheral device
may have one or more interrupt lines to the Vectored Interrupt Controller. Each line may
represent more than one interrupt source, as noted.
Exception numbers relate to where entries are stored in the exception vector table.
Interrupt numbers are used in some other contexts, such as software interrupts.
In addition to the signals listed in
and
, the NVIC handles the
Non-Maskable Interrupt (NMI). In order for NMI to operate from an external signal, the
NMI function must be connected to the related device pin (P4_0 or PE_4). When
connected, a logic one on the pin will cause the NMI to be processed. For details, refer to
the Cortex-M4 or Cortex-M0 User Guide.
9.6.1 Interrupt sources for the Cortex-M4
Table 77.
NVIC pin description
Function
Direction
Description
NMI
I
External Non-Maskable Interrupt (NMI) input
Table 78.
Connection of interrupt sources to the Cortex-M4 NVIC
Interrupt
ID
Exception
Number
Vector
Offset
Function
Flags
0
16
0x40
DAC
-
1
17
0x44
M0APP
Cortex-M0APP; Latched TXEV; for
M4-M0APP communication
2
18
0x48
DMA
-
3
19
0x4C
-
Reserved
4
20
0x50
FLASHEEPROM
ORed flash bank A, flash bank B,
EEPROM interrupts
5
21
0x54
ETHERNET
Ethernet interrupt
6
22
0x58
SDIO
SD/MMC interrupt
7
23
0x5C
LCD
-
8
24
0x60
USB0
OTG interrupt
9
25
0x64
USB1
-
10
26
0x68
SCTimer/PWM
SCTimer/PWM combined interrupt
11
27
0x6C
RITIMER
-