MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 712

• 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

21.3.1.6 Generating Six Compare Types
21.3.2 Instruction Support
MPC555
USER’S MANUAL
When the IFM bit is clear, every matched instruction can cause an instruction break-
point (used for “go from x”). This bit is set by the software and cleared by the hardware
after the first instruction breakpoint match is ignored. Load/store breakpoints and all
counter generated breakpoints (instruction and load/store) are not affected by this
mode.
Using the four compare types mentioned above (equal, not equal, greater than, less
than) it is possible to generate also two more compare types: greater than or equal and
less than or equal.
This method does not work for the following boundary cases:
These boundary cases need no special support because they all mean ‘always true’
and can be programmed using the ignore option of the load/store watchpoint program-
ming (refer to
There are four instruction address comparators A,B,C, and D. Each is 30 bits long,
generating two output signals: equal and less than. These signals are used to gener-
ate one of the following four events: equal, not equal, greater than, less than.
The instruction watchpoints and breakpoint are generated using these events and ac-
cording to user programming. Note that using the OR option enables “out of range” de-
tect.
• Generating the greater than or equal compare type can be done by using the
• Generating the less than or equal compare type can be done by using the less
• Less than or equal of the largest unsigned number (1111...1)
• Greater than or equal of the smallest unsigned number (0000...0)
• Less than or equal of the maximum positive number when in signed mode
• Greater than or equal of the maximum negative number when in signed mode
/
greater than compare type and programming the comparator to the needed value
minus 1.
than compare type and programming the comparator to the needed value plus 1.
(0111...1)
(1000...)
MPC556
21.3 Watchpoints and Breakpoints
DEVELOPMENT SUPPORT
Rev. 15 October 2000
Support).
MOTOROLA
21-16