Datasheet

Development Support
Breakpoints
MC68HC912D60A — Rev. 3.1 Technical Data
Freescale Semiconductor Development Support 401
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.
Table 19-11. Breakpoint Read/Write Control
BK1RWE BK1RW BK0RWE BK0RW Read/Write Selected
––0XR/W
is don’t care for full mode or dual mode BKP0
––10R/W
is write for full mode or dual mode BKP0
––11R/W
is read for full mode or dual mode BKP0
0X––R/W
is don’t care for dual mode BKP1
10––R/W
is write for dual mode BKP1
11––R/W
is read for dual mode BKP1
Bit 7654321Bit 0
Bit 15 14 13 12 11 10 9 Bit 8
RESET: 0 0 0 0 0 0 0 0
BRKAH — Breakpoint Address Register, High Byte $0022
Bit 7654321Bit 0
Bit 7654321Bit 0
RESET: 0 0 0 0 0 0 0 0
BRKAL — Breakpoint Address Register, Low Byte $0023