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MSP430I2041: Which interrupts are fired when SD24 channels are grouped, and when to read?

Part Number: MSP430I2041


Hi all,

I am using SD24 channels 1, 2, and 3 grouped with SD24GRP set on 1 and 2, making 3 the master. I am trying to understand if I should expect, and handle, interrupts for all three channels or if I should only handle interrupts from the master channel.

Ideally, I would like to receive one interrupt each time a conversion is complete for all three channels, and then read all three channels at once.

If I set SD24IE on all three channels, I seem to only receive interrupts on channel 1. If I reset SD24IE on channel 1, I then get interrupts on 2. And likewise if I reset 2 I get them on 3.

So, can someone recommend the appropriate configuration for my use case of reading all three channels at once?

Thanks,

Jason

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