MC68HC08AS32 Datasheet, PDF (153/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Break Module (Break)
Functional Description
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 11-1. Break Module Block Diagram
Addr.
$FE0C
Table 11-1. Break I/O Register Summary
Register Name
Bit 7 6
5
4
3
2
1 Bit 0
Break Address Register High (BRKH) BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8
$FE0D
Break Address Register Low (BRKL) BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
$FE0E Break Status/Control Register (BRKSCR) BRKE BRKA R
R
R
R
R
R
R = Reserved
11.4.1 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 9.8.3 SIM Break Flag Control Register and the
Break Interrupts subsection for each module.)
MC68HC08AS32 — Rev. 3.0
MOTOROLA
Break Module (Break)
Advance Information
153