MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 738

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MPC555
USER’S MANUAL
Internal
Activity
Internal
Activity
External
Transaction
External
Transaction
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 re-
duction 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.
benefit of the “fast download procedure”.
/
MPC556
INIT:Save RX, RY
RY <- Memory Block address- 4
•••
repeat:mfsprRX, DPDR
DATA word to be moved to memory
stwuRX, 0x4(RY)
until here
•••
Restore RX,RY
Figure 21-11 Download Procedure Code Example
Figure 21-12 Slow Download Procedure Loop
Figure 21-13 Fast Download Procedure Loop
MFSPR
DEVELOPMENT SUPPORT
Rev. 15 October 2000
Figure 21-12
DATA
DATA
and
Figure 21-13
illustrate the time
STWU
MOTOROLA
21-42