Fujitsu MB91460 SERIES Nota aplikacyjna - Strona 19

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INTERRUPTS

Chapter 3 Interrupt Recommendations and Examples

3.9 Interrupt Vector Relocation

As discussed in the section 2.5.2, the interrupt vector table can be relocated to any word-

aligned (32-bit) memory location in steps of using the TBR.

This may be required when the original vector table is inaccessible at some point of time and

still the interrupts need to be serviced. Such need may arise in an application when some

sector of the Flash needs to be erased or programmed and while it is happening, some

interrupts such as CAN receive or UART receive interrupts need to be attended.

Here it is demonstrated to relocate the CAN0 and UART0 Receive vectors and not the

entire vector table but it is HIGHLY recommended that the entire vector table is

relocated to RAM. This is because if in case any unhandled interrupt occurs then the

software would crash.

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MCU-AN-300055-E-V10