MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 25-75
25.14.2.2 Watchpoint Trigger Register (WT)
The watchpoint trigger register allows the watchpoints defined internally to the NXDM module to trigger
actions. These watchpoints can control data trace enable and disable. The WT bits can be used to produce
an address related window for triggering trace messages.
Table 25-47. DC2 Field Description
Bit Name Description
31–24 EWC
1
1
The EOC bits in DC1 must be programmed to trigger EVTO on watchpoint occurrence for the EWC bits to
have any effect.
EVTO
Watchpoint Configuration
00000000 = No watchpoints trigger EVTO
1XXXXXXX = Reserved
X1XXXXXX = Reserved
XX1XXXXX = Reserved
XXX1XXXX = Reserved
XXXX1XXX = Internal watchpoint #1 triggers EVTO
XXXXX1XX = Internal watchpoint #2 triggers EVTO
XXXXXX1X = Reserved
XXXXXXX1 = Reserved
23–0 – Reserved, read as 0.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R000000 DTS DTE 0000
W
Reset0000000000000000
1514131211109876543210
R0000000000000000
W
Reset0000000000000000
Figure 25-55. Watchpoint Trigger Register (WT)
Table 25-48. WT Field Description
Bit Name Description
31–26 – Reserved, read as 0.
25–23 DTS DTS - Data trace start control
000 Trigger disabled
001-100 Reserved
101 Use internal watchpoint #1 (BWA1 register)
110 Use internal watchpoint #2 (BWA2 register)
111 Reserved
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