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MAC7200 Datasheet(PDF) 212 Page - Freescale Semiconductor, Inc

Part # MAC7200
Description  MAC7200 Microcontroller Family Reference Manual
PDF  976 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MAC7200 Datasheet(HTML) 212 Page - Freescale Semiconductor, Inc

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Introduction
MAC7200 Microcontroller Family Reference Manual, Rev. 2
134
Freescale Semiconductor
NOTE
Due to the conditional nature of 32-bit ARM instructions, when in ARM
mode, Program Trace will be implemented using Branch History/Predicate
Instruction Messages. When in Thumb mode, the user can select between
traditional Program Trace using Direct/Indirect Branch Messages, or
Branch History Messages.
If the Branch History method is selected in Thumb mode, the shaded
TCODES above will not be messaged out.
Program Trace –
Program
Correlation
Message
6
6
TCODE
fixed
TCODE number = 33
4
4
SRC
fixed
source processor identifier (multiple Nexus configuration)
4
4
ECODE
fixed
event correlated with program flow (Refer to Table 11-5)
1
8
I-CNT
variable
# sequential instructions executed since last taken branch
1
32
HIST
variable
branch / predicate instruction history
Table 11-2. Error Code Encoding (TCODE = 8)
Error Code
Description
00000
Ownership Trace overrun
00001
Program Trace overrun
00010
Data Trace overrrun
00011
Read/write access error
00101
Invalid access opcode (Nexus Register unimplemented)
00110
Watchpoint overrun
00111
(Program Trace or Data Trace) & Ownership Trace overrun
01000
(Program Trace or Data Trace or Ownership Trace) & Watchpoint overrun
01001–10111
Reserved
11000
BTM lost due to collision w/ higher priority message
11001–11111
Reserved
Table 11-3. Watchpoint Source Encoding (TCODE = 15)
Watchpoint Code
Description
xxxx xxx1
ARM7 Watchpoint 0
xxxx xx1x
ARM7 Watchpoint 1
xxxx x1xx
Nexus Watchpoint 1
Table 11-1. Public TCODEs Supported (Continued)
Message Name
Minimum
Packet
Size (bits)
Maximum
Packet
Size (bits)
Packet
Name
Packet
Type
Packet Description



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