Freescale Semiconductor, Inc.
Development Support
Breakpoints
BK1ALE — Breakpoint 1 Range Control
Only valid in dual address mode.
0 = BRKDL will not be used to compare to the address bus.
1 = BRKDL will be used to compare to the address bus.
BK0ALE — Breakpoint 0 Range Control
Valid in all modes.
0 = BRKAL will not be used to compare to the address bus.
1 = BRKAL will be used to compare to the address bus.
Table 19-10. Breakpoint Address Range Control
BK1ALE BK0ALE
Address Range Selected
Upper 8-bit address only for full mode or dual mode BKP0
Full 16-bit address for full mode or dual mode BKP0
Upper 8-bit address only for dual mode BKP1
Full 16-bit address for dual mode BKP1
–
–
0
1
0
1
–
–
Bit 7
6
BKDBE
0
5
BKMBH
0
4
BKMBL
0
3
BK1RWE
0
2
BK1RW
0
1
BK0RWE
0
Bit 0
BK0RW
0
0
0
RESET:
BRKCT1 — Breakpoint Control Register 1
$0021
This register is read/write in all modes.
BKDBE — Enable Data Bus
Enables comparing of address or data bus values using the BRKDH/L
registers.
0 = The BRKDH/L registers are not used in any comparison
1 = The BRKDH/L registers are used to compare address or data
(depending upon the mode selections BKEN1,0)
68HC(9)12D60 — Rev 4.0
MOTOROLA
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