User guide

Nested Vectored Interrupt Controller
ARM DDI 0337I Copyright © 2005-2008, 2010 ARM Limited. All rights reserved. 6-5
ID072410 Non-Confidential
Table 6-2 shows the ICTR bit assignments.
Table 6-2 ICTR bit assignments
Bits Name Function
[31:4] - Reserved.
[3:0] INTLINESNUM Total number of interrupt lines in groups of 32:
0b0000 = 0...32
0b0001 = 33...64
0b0010 = 65...96
0b0011 = 97...128
0b0100 = 129...160
0b0101 = 161...192
0b0110 = 193...224
0b0111 = 225...256
a
a. The processor supports a maximum of 240 external interrupts.