MSP430FR6047: Information request about LEA operation with external interrupt

Vladimir Zitoli

Part Number: MSP430FR6047

Tool/software:

Dear Support Service,

I am writing to inquire about the behavior of the LEA (Low Energy Accelerator) peripheral embedded in the MSP430FR6047 microcontroller during an external interrupt event.

Based on my observations, it appears that the LEA peripheral continues its operations even when the CPU halts its current activities to service the interrupt.

Could you please confirm if this understanding is correct – specifically, whether the LEA operates independently with the CPU's interrupt handling routine?

Hope it is all clear. Looking forward to hearing from you.

Kind regards,

Vladimir Zitoli

3 months ago

0 Bruce McKenney 3 months ago

Guru 99125 points

Since the CPU doesn't halt for an interrupt, I expect that the LEA continues to operate.

LEA Commands Reference (SLAU850) Sec 1.2.2 discusses how the LEA operates in LPM -- it is capable of running down to LPM3. I don't know how the (LEA) DSP library sets LEALPR, but I've used the LEA in LPM0.

+1 Cash Hao11 3 months ago in reply to Bruce McKenney

TI__Mastermind 46155 points

Hi,

The LEA is a standalone peripheral, it will continue operate unless CPU directly stops LEA.

Best regards,

Cash Hao

0 Vladimir Zitoli 3 months ago in reply to Cash Hao11

Prodigy 50 points

Dear Cash and Bruce,

thank you for this clarification!

Kind regards,

Vladimir Zitoli

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MSP430FR6047: Information request about LEA operation with external interrupt