www.ti.com
Overview
663
SPNU563A–March 2018
Submit Documentation Feedback
Copyright © 2018, Texas Instruments Incorporated
Vectored Interrupt Manager (VIM) Module
19.1 Overview
The vectored interrupt manager (VIM) provides hardware assistance for prioritizing and controlling the
many interrupt sources present on a device. Interrupts are caused by events outside of the normal flow of
program execution. Normally, these events require a timely response from the central processing unit
(CPU); therefore, when an interrupt occurs, the CPU switches execution from the normal program flow to
an interrupt service routine (ISR).
The VIM module has the following features:
• Dual VIM for safety
• Supports 127 interrupt channels, in both register vectored interrupt and hardware vectored interrupt
mode.
– Provides IRQ vector directly to the CPU VIC port
– Provides FIQ/IRQ vector through registers
– Provides programmable priority and enable for interrupt request lines
• Provides a direct hardware dispatch mechanism for fastest IRQ dispatch.
• Provides two software dispatch mechanisms for backward compatibility with earlier generation of TI
processors.
– Index interrupt
– Register vectored interrupt
• ECC (Error Code Correction) protected vector interrupt table against soft errors.
To Next Page
Loading...
Need help?
General
