Datasheet

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Overview

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.

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SPNU562–May 2014 Vectored Interrupt Manager (VIM) Module

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