FreeLists / si-list / [SI-LIST] Off Topic : JTAG memory read

[si-list] || [Date Prev] [07-2002 Date Index] [Date Next] || [Thread Prev] [07-2002 Thread Index] [Thread Next]

[SI-LIST] Off Topic : JTAG memory read

From: "Deepak Mohan" <mdeepak@xxxxxxxxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Date: Fri, 5 Jul 2002 13:33:51 +0530

Hi.
I have an embedded board (32 bit address bus, data bus) with 16 MB of
memory. The 16 MB consists of Flash, ROM, SRAM and SDRAM. The SDRAM is the
higher address memory, and ends at 0x1000000 .
When I view the memory using the JTAG debugger, all memory above 0x1000000
is shown as '??'. Why is that? How does the JTAG debugger know that I have
only 16 MB of RAM? I was under the impression that unused memory addresses
are usually mirrored.

TIA.

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu