Development Support
MPC561/MPC563 Reference Manual, Rev. 1.2
23-38
Freescale Semiconductor
For large blocks of data this sequence may take significant time to complete. The “fast download
procedure” of the debug port may be used to reduce this time. This time reduction is achieved by
eliminating the need to transfer the instructions in the loop to the debug port. The only transactions needed
are those required to transfer the data to be placed in system memory.
and
illustrate the time benefit of the “fast download procedure”.
Figure 23-13. Slow Download Procedure Loop
Figure 23-14. Fast Download Procedure Loop
The sequence of the instructions used in the “fast download procedure” is the one illustrated in
with RX = r31 and RY = r30. This sequence is repeated infinitely until the “end download
procedure” command is issued to the debug port.
Note that, the internal general purpose register 31 is used for temporary storage data value. Before
beginning the “fast download procedure” by the “start download procedure command”, The value of the
first memory block address, – 4, must be written to the general purpose register 30.
To end a download procedure, an “end download procedure” command should be issued to the debug port,
and then, additional DATA transaction should be sent by the development tool. This data word will NOT
be placed into the system memory, but it is needed to stop the procedure gracefully.
23.5
Software Monitor Debugger Support
When in debug mode disable, a software monitor debugger can make use of all of the development support
features defined in the CPU. When debug mode is disabled all events result in regular interrupt handling,
i.e. the processor resumes execution in the corresponding interrupt handler. The exception cause register
(ECR) and the debug enable register (DER) only influence the assertion and negation of the freeze signal.
23.5.1
Freeze Indication
The internal freeze signal is connected to all relevant internal modules. These modules can be programmed
to stop all operations in response to the assertion of the freeze signal. In order to enable a software monitor
debugger to broadcast the fact that the debug software is now executed, it is possible to assert and negate
the internal freeze signal also when debug mode is disabled.
External
MFSPR
DATA
STWU
Transaction
Internal
Activity
External
DATA
Transaction
Internal
Activity
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
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...