Development Support
68HC(9)12DG128
352
Development Support
MOTOROLA
These bits are used to compare against the most significant byte of the
address bus.
These bits are used to compare against the least significant byte of the
address bus. These bits may be excluded from being used in the match
if BK0ALE = 0.
These bits are compared to the most significant byte of the data bus or
the most significant byte of the address bus in dual address modes.
BKEN[1:0], BKDBE, and BKMBH control how this byte will be used in the
breakpoint comparison.
BRKAH —
Breakpoint Address Register, High Byte
$0022
Bit 7
6
5
4
3
2
1
Bit 0
Bit 15
14
13
12
11
10
9
Bit 8
RESET:
0
0
0
0
0
0
0
0
BRKAL —
Breakpoint Address Register, Low Byte
$0023
Bit 7
6
5
4
3
2
1
Bit 0
Bit 7
6
5
4
3
2
1
Bit 0
RESET:
0
0
0
0
0
0
0
0
BRKDH —
Breakpoint Data Register, High Byte
$0024
Bit 7
6
5
4
3
2
1
Bit 0
Bit 15
14
13
12
11
10
9
Bit 8
RESET:
0
0
0
0
0
0
0
0
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