MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 597

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

22.14.6.1 Memory Address Latch (MAL)
22.14.6.2 Breakpoint Address Base Registers
22.14.7 Breakpoint Address Mask Registers
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
Address comparators can be used to determine where a program may
be getting lost or when data is being written to areas which should not
be written. They are also useful in halting a program at a specific point
to examine or change registers or memory. Using address comparators
to set breakpoints enables the user to set breakpoints in RAM or ROM
in any operating mode. Memory accesses are monitored according to
the contents of the OCR.
The address comparator generates a match signal when the address on
the bus matches the address stored in the Breakpoint Address Base
Register, as masked with individual bit masking capability provided by
the Breakpoint Address Mask Register. The address match signal and
the access attributes are further qualified with the RCx4–RCx0 and
BCx4–BCx0 control bits. This qualification is used to decrement the
breakpoint counter conditionally if its contents are non-zero. If the
contents are zero, the counter is not decremented and the breakpoint
event occurs (ISBKPTx asserted).
The MAL is a 32-bit register that latches the address bus on every
access.
The 32-bit Breakpoint Address Base Registers (BABA and BABB) store
memory breakpoint base addresses. BABA and BABB can be read or
written through the OnCE serial interface. Before enabling breakpoints,
the external command controller should load these registers.
The 32-bit Breakpoint Address Mask Registers (BAMA and BAMB)
registers store memory breakpoint base address masks. BAMA and
BAMB can be read or written through the OnCE serial interface. Before
enabling breakpoints, the external command controller should load
these registers.
Freescale Semiconductor, Inc.
For More Information On This Product,
JTAG Test Access Port and OnCE
Go to: www.freescale.com
JTAG Test Access Port and OnCE
Functional Description
Advance Information
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