Unable to write and read to/from external memory

hai everybody
I am working on ADSP-21062 interfacing with 1553 ic (DDC ic BU61588p3-300).
the problem is when ever Iam writing some data at location 0x430000 or 0x430008, then the processor is being halted. if the last digit is 0 or 8, then it is not working.

MS(0), MS(1), MS(2) and MS(3) all having same problem.
MS(3) has been assigned to 1553 ic.
MS(0) for Latch, etc.

so when ever i write data into 0x430000,0x430008,0x430010,0x430018,0x430020,0x430028....
0x430140,0x430148....etc
then the processor is being halted.
please can one help me in this regard.

thanks a lot in advance
prakash Start a New Thread

On Tue, 4 Apr 2006, prakash b wrote:

> hai everybody
> I am working on ADSP-21062 interfacing with 1553 ic (DDC ic BU61588p3-300).
> the problem is when ever Iam writing some data at location 0x430000 or 0x430008, then the processor is being halted. if the last digit is 0 or 8, then it is not working.
>
> MS(0), MS(1), MS(2) and MS(3) all having same problem.
> MS(3) has been assigned to 1553 ic.
> MS(0) for Latch, etc.
>
> so when ever i write data into 0x430000,0x430008,0x430010,0x430018,0x430020,0x430028....
> 0x430140,0x430148....etc
> then the processor is being halted.
> please can one help me in this regard.
>
> thanks a lot in advance
> prakash

Howdy Prakash,

What do you have the wait register programmed for? Is it waiting for
external ack and not getting it from those addresses?

DMA can hang for other reasons, but this does not sound like you're using
dma.

Patience, persistence, truth,
Dr. mike Start a New Thread