Datasheet
LPC2109_2119_2129_5 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 05 — 7 March 2007 10 of 35
NXP Semiconductors
LPC2109/2119/2129
Single-chip 16/32-bit microcontrollers
6.5 Interrupt controller
The Vectored Interrupt Controller (VIC) accepts all of the interrupt request inputs and
categorizes them as FIQ, vectored IRQ, and non-vectored IRQ as defined by
programmable settings. The programmable assignment scheme means that priorities of
interrupts from the various peripherals can be dynamically assigned and adjusted.
Fast Interrupt reQuest (FIQ) has the highest priority. If more than one request is assigned
to FIQ, the VIC combines the requests to produce the FIQ signal to the ARM processor.
The fastest possible FIQ latency is achieved when only one request is classified as FIQ,
because then the FIQ service routine can simply start dealing with that device. But if more
than one request is assigned to the FIQ class, the FIQ service routine can read a word
from the VIC that identifies which FIQ source(s) is (are) requesting an interrupt.
Fig 3. LPC2109/2119/2129 memory map
AHB PERIPHERALS
VPB PERIPHERALS
RESERVED ADDRESS SPACE
BOOT BLOCK (RE-MAPPED FROM
ON-CHIP FLASH MEMORY
RESERVED ADDRESS SPACE
16 KBYTE ON-CHIP STATIC RAM (LPC2119/2129)
8 KBYTE ON-CHIP STATIC RAM (LPC2109)
RESERVED ADDRESS SPACE
256 KBYTE ON-CHIP FLASH MEMORY (LPC2129)
0xFFFF FFFF
0xF000 0000
0xEFFF FFFF
0xE000 0000
0xC000 0000
0xDFFF FFFF
0x8000 0000
0x7FFF FFFF
0x7FFF E000
0x7FFF DFFF
0x4001 0000
0x4000 3FFF
0x4000 0000
0x4000 1FFF
0x3FFF FFFF
0x0004 0000
0x0003 FFFF
0x0002 0000
4.0 GB
3.75 GB
3.5 GB
3.0 GB
2.0 GB
1.0 GB
0.0 GB
128 KBYTE ON-CHIP FLASH MEMORY (LPC2119)
64 KBYTE ON-CHIP FLASH MEMORY (LPC2109)
0x0001 FFFF
0x0000 0000
0x0000 FFFF
002aaa664