LPC2220 datasheet(16/50 Pages) NXP

16 / 50 page

LPC2210_2220_6

Product data sheet

Rev. 06 — 11 December 2008

16 of 50

NXP Semiconductors

LPC2210/2220

16/32-bit ARM microcontrollers

6.4 Interrupt controller

The VIC accepts all of the interrupt request inputs and categorizes them as Fast Interrupt

Request (FIQ), vectored Interrupt Request (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.

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.

Vectored IRQs have the middle priority. Sixteen of the interrupt requests can be assigned

to this category. Any of the interrupt requests can be assigned to any of the 16 vectored

IRQ slots, among which slot 0 has the highest priority and slot 15 has the lowest.

Fig 4.

LPC2210/2220 memory map

AHB PERIPHERALS

APB PERIPHERALS

RESERVED ADDRESS SPACE

BOOT BLOCK (RE-MAPPED FROM

ON-CHIP ROM MEMORY)

RESERVED ADDRESS SPACE

64 kB ON-CHIP STATIC RAM (LPC2220)

16 kB ON-CHIP STATIC RAM (LPC2210)

RESERVED ADDRESS SPACE

0xFFFF FFFF

0xF000 0000

0xEFFF FFFF

0xE000 0000

0xDFFF FFFF

0x8400 0000

0x7FFF FFFF

0x7FFF E000

EXTERNAL MEMORY BANK 3

0x83FF FFFF

0x8300 0000

EXTERNAL MEMORY BANK 2

0x82FF FFFF

0x8200 0000

EXTERNAL MEMORY BANK 1

0x81FF FFFF

0x8100 0000

EXTERNAL MEMORY BANK 0

0x80FF FFFF

0x8000 0000

0x7FFF DFFF

0x4000 4000

0x4000 3FFF

0x4001 0000

0x4000 FFFF

0x4000 0000

0x3FFF FFFF

4.0 GB

3.75 GB

3.5 GB

3.0 GB

2.0 GB

1.0 GB

0x0000 0000

0.0 GB

002aaa795

LPC2220 Datasheet(PDF) 16 Page - NXP Semiconductors

LPC2220 Datasheet(HTML) 16 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Datasheet Download

Link URL