ARM NVIC - cortex-M3

Interrupt Control Type Register Read-only 0xE000E004 ^[1] Interrupt Controller Type Register

Read the Interrupt Controller Type Register to see the number of interrupt lines that the NVIC supports.

The register address, access type, and Reset state are:

Address: 0xE000E004
Access: Read-only
Reset state: Depends on the number of interrupts defined in this processor implementation.

Figure 8.1 shows the fields of the Interrupt Controller Type Register.

Figure 8.1. Interrupt Controller Type Register bit assignments

Table 8.2 describes the fields of the Interrupt Controller Type Register.

Table 8.2. Interrupt Controller Type Register bit assignments

Bits	Field	Function
[31:5]	-	Reserved.
[4:0]	INTLINESNUM	Total number of interrupt lines in groups of 32: b00000 = 0...32^[1] b00001 = 33...64 b00010 = 65...96 b00011 = 97...128 b00100 = 129...160 b00101 = 161...192 b00110 = 193...224 b00111 = 225...256a
^[1]The processor only supports between 1 and 240 external interrupts.

Ameba value : b00000, 0...32

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