Philips Semiconductors

LPC2114/LPC2124

Single-chip 16/32-bit microcontrollers

Product data

Rev. 03 — 22 December 2004

11 of 34

9397 750 13145

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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.

LPC2114/LPC2124 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

RESERVED ADDRESS SPACE

256 KBYTE ON-CHIP FLASH MEMORY (LPC2124)

0xFFFF FFFF

0xF000 0000

0xEFFF FFFF

0xE000 0000

0xC000 0000

0xDFFF FFFF

0x8000 0000

0x7FFF FFFF

0x7FFF E000

0x7FFF DFFF

0x4004 0000

0x4000 3FFF

0x4000 0000

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

128 KBYTE ON-CHIP FLASH MEMORY (LPC2114)

0x0001 FFFF

0x0000 0000

0.0 GB

002aaa661