MC68HC912B32 Datasheet, PDF (126/128 Pages) Motorola, Inc – 16-Bit Microcontroller

Table 49 Breakpoint Read/Write Control
BK1RWE
–
–
–
0
1
1
BK1RW
–
–
–
X
0
1
BK0RWE
0
1
1
–
–
–
BK0RW
X
0
1
–
–
–
Read/Write Selected
R/W is don’t 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 don’t care for dual mode BKP1
R/W is write for dual mode BKP1
R/W is read for dual mode BKP1
BRKAH — 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
1
Bit 0
9
Bit 8
0
0
These bits are used to compare against the most significant byte of the address bus.
$0022
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
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 — 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.
BRKDL — Breakpoint Data Register, Low Byte
$0025
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 compared to the least significant byte of the data bus or the least significant byte of the
address bus in dual address modes. BKEN[1:0], BKDBE, BK1ALE, and BKMBL control how this byte
will be used in the breakpoint comparison.
MOTOROLA
126
MC68HC912B32
MC68HC912B32TS/D