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MC68HC12 Datasheet, PDF (418/478 Pages) Motorola, Inc – The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit | |||
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Development Support
BK1RWE
â
â
â
0
1
1
Table 20-9. Breakpoint Read/Write Control
BK1RW
â
â
â
X
0
1
BK0RWE
0
1
1
â
â
â
BK0RW
X
0
1
â
â
â
Read/Write Selected
R/W is donât care for full mode or dual mode
BKP0
R/W is write for full mode or dual mode BKP0
R/W is read for full mode or dual mode BKP0
R/W is donât care for dual mode BKP1
R/W is write for dual mode BKP1
R/W is read for dual mode BKP1
BRKAH â Breakpoint Address Register, High Byte
Bit 7
6
5
4
3
2
Bit 15
14
13
12
11
10
RESET:
0
0
0
0
0
0
$0022
1
Bit 0
9
Bit 8
0
0
These bits are used to compare against the most significant byte of the
address bus.
BRKAL â 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
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.
BRKDH â Breakpoint Data Register, High Byte
Bit 7
6
5
4
3
2
Bit 15
14
13
12
11
10
RESET:
0
0
0
0
0
0
$0024
1
Bit 0
9
Bit 8
0
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.
Technical Data
418
Development Support
MC68HC912DT128A â Rev 4.0
MOTOROLA
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