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UM0434 Datasheet(PDF) 339 Page - STMicroelectronics

Part # UM0434
Description  The primary objective of this user?셲 manual is to describe
PDF  390 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0434 Datasheet(HTML) 339 Page - STMicroelectronics

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Nexus3 module
UM0434
340/391
Note:
OPC and MCK_DIV must be modified only during system reset or debug mode to ensure
correct output port and output clock functionality. It is also recommended that all other bits of
DC1 be modified only in one of these two modes.
Development control register 2 is shown in
Table 223 and its fields are described in
Table 224.
The EOC bits in DC1 must be programmed to trigger EVTO on watchpoint occurrence for
the EWC bits to have any effect.
12.4.4
Development status register (DS)
The development status registe shown in
Table 225 is used to report system debug status.
When debug mode is entered or exited, or an SOC- or e200z3-defined low-power mode is
4–3
EIC
EVTI control
00
nex_evti_b is used for synchronization (program trace/data trace)
01
nex_evti_b is used for debug request
1XReserved
2–0
TM
Trace mode
000No trace
1XXProgram trace enabled
X1XData trace enabled
XX1Ownership trace enabled
Table 222.
DC1 field descriptions (continued)
Bits
Name
Description
Table 223.
Development control register 2 (DC2)
31
24 23
0
Field
EWC
—
Reset
All zeros
R/W
Read/Write
Number
0x3
Table 224.
DC2 field descriptions
Bits
Name
Description
31–24
EWC
EVTO Watchpoint Configuration
00000000No watchpoints trigger
nex_evto_b
1xxxxxxxWatchpoint #0 (IAC1 from Nexus1) triggers
nex_evto_b
x1xxxxxxWatchpoint #1 (IAC2 from Nexus1) triggers
nex_evto_b
xx1xxxxxWatchpoint #2 (IAC3 from Nexus1) triggers
nex_evto_b
xxx1xxxxWatchpoint #3 (IAC4 from Nexus1) triggers
nex_evto_b
xxxx1xxxWatchpoint #4 (DAC1 from Nexus1) triggers
nex_evto_b
xxxxx1xxWatchpoint #5 (DAC2 from Nexus1) triggers
nex_evto_b
xxxxxx1xWatchpoint #6 (DCNT1 from Nexus1) triggers
nex_evto_b
xxxxxxx1Watchpoint #7 (DCNT2 from Nexus1) triggers
nex_evto_b
23–0
—
Reserved



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