PXR40RM Datasheet, PDF (1383/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Nexus Development Interface (NDI)
<f-helvetica><st-bold>Table 31-37. describes its fields.
Table 31-37. Development Control Register 1 Fields
Field
Description
0
OPC
OPC—Output Port Mode Control
0 Reduced Port Mode configuration (min# nex_mdo[n:0] pins defined
1 Full Port Mode configuration (max# nex_mdo[n:0] pins defined
1–2
MCK_DIV
3
MCK_DIV—MCKO Clock Divide Ratio (see note below)
00 nex_mcko is 1× processor clock frequency.
01 nex_mcko is ½× processor clock frequency.
10 nex_mcko is ¼× processor clock frequency.
11 nex_mcko is ^1-- × processor clock frequency.
8
Reserved for future functionality
4
PTM
PTM—Program Trace Method
0 Program Trace uses traditional branch messages.
1 Program Trace uses branch history messages.
5–16
Reserved for future functionality
17
POTD
Periodic Ownership Trace Disable
0 Periodic ownership trace message events are enabled.
1 Periodic ownership trace message events are disabled.
18–19
TSEN
Timestamp Enable - (not implemented, write to 00)
00 Timestamp is disabled
20–21
EOC
EOC—EVTO Control
00 nex_evto_b upon occurrence of watchpoints (configured in DC2 and DC3)
01 nex_evto_b upon entry into debug mode
1x Reserved
22–23
EIC
EIC—EVTI Control
00 nex_evti_b is used for synchronization (program trace/data trace)
01 nex_evti_b is used for debug request
1X Reserved
24–25
Reserved for future functionality
26–31
TM
Trace Mode¹
000000 All trace disabled
XXXXX1 Ownership trace enabled
XXXX1X Data trace enabled
XXX1XX Program trace enabled
XX1XXX Watchpoint trace enabled
X1XXXX Reserved
1XXXXX Data acquisition trace enabled
1 _{This field may be updated by hardware in response to watchpoint triggering. Writes to this field take}
precedence over hardware updates in the event of a collision.
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
31-67