Nexus
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
24-61
•
Upon data trace write/read after the previous DTM message was lost due to a collision entering the
FIFO between the DTM message and any of the following: watchpoint message, ownership trace
message, or branch trace message
Data trace synchronization messages provide the full address (without leading zeros) and insure that
development tools fully synchronize with data trace regularly. Synchronization messages provide a
reference address for subsequent data messages, in which only the unique portion of the data trace address
is transmitted. The format for data trace write/read with sync. messages is as follows:
Figure 24-46. Data Write/Read with Sync. Message Format
Exception conditions that result in data trace synchronization are summarized in
.
Table 24-37. Data Trace Exception Summary
Exception Condition
Exception Handling
System Reset Negation
At the negation of JTAG reset (JCOMP), queue pointers, counters, state machines,
and registers within the NZ6C3 module are reset. If data trace is enabled, the first
data trace message is a data write/read with sync. message.
Data Trace Enabled
The first data trace message (after data trace has been enabled) is a
synchronization message.
Exit from Low Power/Debug Upon exit from a low power mode or debug mode the next data trace message will
be converted to a data write/read with sync. message.
Queue Overrun
An error message occurs when a new message cannot be queued due to the
message queue being full. The FIFO will discard messages until it has completely
emptied the queue. After it is emptied, an error message will be queued. The error
encoding will indicate which types of messages attempted to be queued while the
FIFO was being emptied. The next DTM message in the queue will be a data
write/read with sync. message.
Periodic Data Trace Sync.
A forced synchronization occurs periodically after 255 data trace messages have
been queued. A data write/read with sync. message is queued. The periodic data
trace message counter then resets.
Event In
If the Nexus module is enabled, a EVTI assertion initiates a data trace write/read
with sync. message upon the next data write/read (if data trace is enabled and the
EIC bits of the DC1 register have enabled this feature).
Attempted Access to Secure
Memory
For devices which implement security, any attempted read or write to secure
memory locations will temporarily disable data trace & cause the corresponding
DTM to be lost. A subsequent read/write will queue a data trace read/write with
sync. message.
Collision Priority
All messages have the following priority: WPM
−>
OTM
−>
BTM
−>
DTM. A DTM
message which attempts to enter the queue at the same time as a watchpoint
message or ownership trace message or branch trace message will be lost. A
subsequent read/write will queue a data trace read/write with sync. message.
DATA
MSB
LSB
2
3
4
F-ADDR
DSZ
SRC
5
4 bits
1
TCODE (001101 or 001110)
3 bits
1-32 bits
1-64 bits
6 bits
Max length = 109 bits; Min length = 15 bits
Содержание MPC5565
Страница 18: ...MPC5565 Microcontroller Reference Manual Devices Supported MPC5565 MPC5565 RM Rev 1 0 09 2007...
Страница 34: ...MPC5565 Reference Manual Rev 1 0 Freescale Semiconductor 15...
Страница 35: ...MPC5565 Reference Manual Rev 1 0 16 Freescale Semiconductor...
Страница 325: ...Error Correction Status Module ECSM MPC5565 Microcontroller Reference Manual Rev 1 0 8 16 Freescale Semiconductor...
Страница 515: ...External Bus Interface EBI MPC5565 Microcontroller Reference Manual Rev 1 0 12 70 Freescale Semiconductor...
Страница 553: ...Flash Memory MPC5565 Microcontroller Reference Manual Rev 1 0 13 38 Freescale Semiconductor...
Страница 559: ...SRAM MPC5565 Microcontroller Reference Manual Rev 1 0 14 6 Freescale Semiconductor...
Страница 577: ...Boot Assist Module BAM MPC5565 Microcontroller Reference Manual Rev 1 0 15 18 Freescale Semiconductor...
Страница 895: ...Deserial Serial Peripheral Interface DSPI MPC5565 Microcontroller Reference Manual Rev 1 0 19 72 Freescale Semiconductor...
Страница 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
Страница 1145: ...MPC5565 Register Map MPC5565 Microcontroller Reference Manual Rev 1 0 A 60 Freescale Semiconductor...
Страница 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...