MC68HC08AZ32A Datasheet, PDF (151/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Break Module
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 10-1. Break Module Block Diagram
Table 10-1. Break I/O Register Summary
Register Name
Break Address Register High (BRKH)
Break Address Register Low (BRKL)
reak Status/Control Register (BRKSCR)
Bit 7 6
5
4
3
2
Bit 15 14 13 12 11 10
Bit 7 6
5
4
3
2
0
0
0
0
BRKE BRKA
1 Bit 0 Addr.
9 Bit 8 $FE0C
1 Bit 0 $FE0D
0
0
$FE0E
= Unimplemented
10.4.1 Flag Protection During Break Interrupts
The system integration module (SIM) controls whether or not 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 System Integration Module (SIM) on
page 95, and the Break Interrupts subsection for each module.
MC68HC08AZ32A — Rev 1.0
MOTOROLA
Break Module
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Technical Data
151