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Bits
Field
[11:10]
DATAVSIZE
[9]
LNK1ENA
[8]
DATAVMATCH
[7]
CYCMATCH
[6]
-
[5]
EMITRANGE
[4]
-
[3:0]
FUNCTION
ARM DDI 0337G
Unrestricted Access
Table 11-17 Bit functions of DWT Function Registers 0-3 (continued)
Function
Defines the size of the data in the COMP register that is to be matched:
00 = byte
01 = halfword
10 = word
11 = Unpredictable.
Read-only:
0 = DATAVADDR1 not supported
1 = DATAVADDR1 supported (enabled).
This bit is only available in comparator 1. When DATAVMATCH is set, this comparator
performs data value compares.
The comparators given by DATAVADDR0 and DATAVADDR1provide the address for the
data comparison. If DATAVMATCH is set in DWT_FUNCTION1, the FUNCTION setting
for the comparators given by DATAVADDR0 and DATAVADDR1 are overridden and those
comparators only provide the address match for the data comparison.
Only available in comparator 0. When set, this comparator compares against the clock cycle
counter.
Reserved.
Emit range field. Reserved to permit emitting offset when range match occurs. Reset clears
the EMITRANGE bit. PC sampling is not supported when EMITRANGE is enabled.
EMITRANGE only applies for:
FUNCTION = b0001, b0010, b0011, b1100, b1101, b1110, and b1111.
Reserved.
See Table 11-18 on page 11-28 for FUNCTION settings.
Copyright © 2005-2008 ARM Limited. All rights reserved.
Non-Confidential
System Debug
11-27
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