ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 62 -
Revision 2.4
IRQ0 ~ IRQ31 Set-Enable Control Register
(
NVIC_ISER
)
Register
Offset
R/W
Description
Reset Value
NVIC_ISER
0x000 R/W
IRQ0 ~ IRQ31 Set-Enable Control Register
0x0000_0000
If a pending interrupt is enabled, the NVIC activates the interrupt based on its priority. If an interrupt is
not enabled, asserting its interrupt signal changes the interrupt state to pending, but the NVIC never
activates the interrupt, regardless of its priority.
Table 5-24 Interrupt Set-Enable Control Register (ISER, address 0xE000_E100) Bit Description
Bits
Description
[31:0]
SETENA
Set-enable Control
Enable one or more interrupts within a group of 32. Each bit represents an interrupt
number from IRQ0 ~ IRQ31 (Vector number from 16 ~ 47).
Writing 1 will enable the associated interrupt.
Writing 0 has no effect.
The register reads back the current enable state.