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Debug Support
5.13.2
Using the mask registers
5-40
For example, if a watchpoint is requested on a particular memory location but the data
value is irrelevant, the data mask register can be programmed to 0xffffffff, (all bits set
to 1), to make the entire data bus value ignored.
For each value register there is an associated mask register in the same format. Setting
a bit to 1 in the mask register causes the corresponding bit in the value register to be
ignored in any comparison.
Copyright © 1998, 1999 ARM Limited. All rights reserved.
Figure 5-9 ARM9TDMI EmbeddedICE macrocell overview
ARM DDI0145B
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