READI Module
MPC561/MPC563 Reference Manual, Rev. 1.2
24-4
Freescale Semiconductor
24.2.2
Security
Security is provided via the UC3F censorship mechanism. If a UC3F array is in censored mode, reads or
writes to the UC3F will not be allowed (RCPU will not be able to fetch instructions from the UC3F) once
any of the following cases are detected:
•
Program trace and/or data trace are enabled
•
Read/write access is attempted (can be to any address location)
•
RCPU development access is enabled.
24.2.3
Normal
Normal operation of the READI module allows for developement support features to be available. These
features include control of the device, access to registers, and the ability to perform data or instruction
trace.
24.2.4
Disabled
If EVTI is negated at negation of RSTI, the READI module will be disabled. No trace output will be
provided, and output auxiliary port will be three-stated. Any message sent by the tool is ignored.
24.3
Parametrics
With 32-deep message queues, throughput numbers were calculated for the following benchmark codes
[assuming full port mode]:
•
For an example benchmark which had 10.9% direct branches, 2.5% indirect branches, 10.4% data
writes, and 19.3% data reads, approximately 20% of total data trace accesses will be traced.
•
For another example benchmark which had 9.8% direct branches, 2.8% indirect branches, 6.6%
data writes, and 18.3% data reads, approximately 27% of total data trace accesses will be traced.
NOTE
The queue is only 16 messages deep on revisions prior to Rev. D of the
MPC561 and is 16 deep in Rev. B and earlier versions of the MPC563.
For reduced port mode, the data trace feature should not be used, or used sparingly, so as not to cause queue
overruns.
24.4
Messages
The READI module implements messaging via the auxiliary port according to the IEEE-ISTO 5001 -
1999. Messaging will be implemented via transfer codes (TCODEs) on the auxiliary port. The TCODE
number for the message identifies the transfer format (the number and/or size of packets to be transferred)
and the purpose of each packet.
Public messages outlined in
are supported by READI.
Summary of Contents for MPC561
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Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...