Nexus Development Interface (NDI)
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor 36-33
DC2 is shown in Figure 36-15 and its fields are described in Table 36-21.
EOC EVTO Control.
00 EVTO
upon occurrence of watchpoints (configured in DC2).
01 EVTO upon entry into debug mode.
10 EVTO
upon timestamping event.
11 Reserved.
PTM Program Trace Method.
0 Program trace uses traditional branch messages.
1 Program trace uses branch history messages.
WEN Watchpoint Trace Enable.
0 Watchpoint messaging disabled.
1 Watchpoint messaging enabled.
OVC Overrun Control.
000 Generate overrun messages.
001–010 Reserved.
011 Delay processor for BTM / DTM / OTM overruns.
1XX Reserved.
EIC EVTI
Control.
00 EVTI is used for synchronization (program trace/ data trace).
01 EVTI is used for debug request.
1X Reserved.
TM Trace Mode. Any or all of the TM bits may set, enabling one or more traces.
000 No trace.
1XX Program trace enabled.
X1X Data trace enabled.
XX1 Ownership trace enabled.
1
The output port mode control bit (OPC) and MCKO divide bits (MCK_DIV) are shown for clarity. These functions are controlled
globally by the NPC port control register (PCR). These bits are writable in the PCR but have no effect.
Nexus Reg: 0x3 Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
EWC
00000000
W
Reset0000000000000000
1514131211109 876543210
R0000000000000000
W
Reset0000000000000000
Figure 36-15. Development Control Register 2 (DC2)
Table 36-20. DC1 Field Descriptions (continued)
Field Description
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