Keil forum LPC1768 - vector table size

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LPC1768 - vector table size

Lukasz Gesieniec over 15 years ago

Hi,

how to check size of the Interrupt Vector Table in LPC1768. I want to copy this table from flash to ram.

Regards

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0 Lukasz Gesieniec over 15 years ago in reply to ImPer Westermark

You are right. Now I found in the datasheet:
"The vector table may be located anywhere within the bottom 1 GB of Cortex-M3 address
space. The vector table should be located on a 256 word (1024 byte) boundary to insure
alignment on LPC17xx family devices."

Thanks.
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0 Lukasz Gesieniec over 15 years ago in reply to ImPer Westermark

You are right. Now I found in the datasheet:
"The vector table may be located anywhere within the bottom 1 GB of Cortex-M3 address
space. The vector table should be located on a 256 word (1024 byte) boundary to insure
alignment on LPC17xx family devices."

Thanks.
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0 ImPer Westermark over 15 years ago in reply to Lukasz Gesieniec

You didn't read everything in the user manual.

Look for example at figure 3 LPC17xx system memory map.

Does the vector table seem to be 1 kB large?

You may also look at table 51 and see if you find any vectors spanning the full kilobyte. 1kB has room for a lot of interrupt vectors, but the NVIC doesn't mention such a large number of vectors.
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