mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 375

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

18.5 Breakpoints
18.5.1 Breakpoint Modes
MC68HC912DG128 — Rev 3.0
MOTOROLA
Hardware breakpoints are used to debug software on the
MC68HC912DG128 by comparing actual address and data values to
predetermined data in setup registers. A successful comparison will
place the CPU in background debug mode (BDM) or initiate a software
interrupt (SWI). Breakpoint features designed into the
MC68HC912DG128 include:
Three modes of operation determine the type of breakpoint in effect.
Breakpoints will not occur when BDM is active.
Freescale Semiconductor, Inc.
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For More Information On This Product,
Mode selection for BDM or SWI generation
Program fetch tagging for cycle of execution breakpoint
Second address compare in dual address modes
Range compare by disable of low byte address
Data compare in full feature mode for non-tagged breakpoint
Byte masking for high/low byte data compares
R/W compare for non-tagged compares
Tag inhibit on BDM TRACE
Dual address-only breakpoints, each of which will cause a
software interrupt (SWI)
Single full-feature breakpoint which will cause the part to enter
background debug mode (BDM)
Dual address-only breakpoints, each of which will cause the part
to enter BDM
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