What is priority of all interrupts in MSP430G2955?

Nishant Misra

Other Parts Discussed in Thread: MSP430G2955

I read the MSP430x2xx family User Guide. The table of priority of interrupts shown there is device specific.

But the datasheet of MSP430G2955 doesn't provide any information regarding that.

So can anyone suggest me some document where I find the priority of all interrupts in MSP430G2955, i.e. what is order of execution if suppose USCIAB0RX_VECTOR, ADC10_VECTOR, TIMER0_A0_VECTOR, TIMER1_A0_VECTOR, etc. interrupts occur simultaneously.

I am building an industry level system, therefore I need to clarify that.

Thanks in advance.

over 12 years ago

0 zrno soli over 12 years ago

Guru 34973 points

In SLAS800 MSP430G2955 device datasheet there is Table 5. Interrupt Sources, Flags, and Vectors with interrupts sorted by priority from highest to lowest

0 Nishant Misra over 12 years ago in reply to zrno soli

Prodigy 120 points

Thank you very much @zrno soli. My bad!! I must have missed that page in hurry.

Thanks anyways!!

0 Jens-Michael Gross over 12 years ago

Guru 227245 points

As Zrno stated, the interrupt table in the datasheet also contains the priorities.

However, interrupt priorities only apply if two interrupts are pending. Once an ISR has been started it will not be interrupted by a higher priority interrupt.

If you use interrupt nesting, which is not (I repeat: NOT!) recommended, then an ISR can be interrupted by any interrupt, even with lower priority, and including itself.

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What is priority of all interrupts in MSP430G2955?