MC68HC08AS32 Datasheet, PDF (252/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

IAB[15:8]
IAB[15:0]
BREAK ADDRESS REGISTER HIGH
8-BIT COMPARATOR
8-BIT COMPARATOR
BREAK ADDRESS REGISTER LOW
CONTROL
BKPT
TO SIM
IAB[7:0]
Figure 16-1. Break Module Block Diagram
Addr.
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
Break Address Register High ^Read: _{Bit 15}
14
13
12
11
10
9
Bit 8
$FE0C
(BRKH) Write:
See page 254. _Reset:
0
0
0
0
0
0
0
0
Break Address Register Low ^Read: _{Bit 7}
6
5
4
3
2
1
Bit 0
$FE0D
(BRKL) Write:
See page 254. _Reset:
0
0
0
0
0
0
0
0
Break Status and Control Regis- ^Read: _BRKE
BRKA
0
0
0
0
0
0
$FE0E
ter (BRKSCR) Write:
R
R
R
R
R
R
See page 253. _Reset:
0
0
0
0
0
0
0
0
R = Reserved
Figure 16-2. Break I/O Register Summary
16.2.1.1 Flag Protection During Break Interrupts
The system integration module (SIM) controls whether module status bits can be
cleared during the break state. The BCFE bit in the SIM break flag control register
(SBFCR) enables software to clear status bits during the break state. (See 13.7.3
SIM Break Flag Control Register and the Break Interrupts subsection for each
module.)
Data Sheet
252
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor