MC68HC08AZ0 Datasheet, PDF (143/444 Pages) Motorola, Inc – Advance Information

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 11. Break module block diagram
Table 1. Break I/O register summary
Register Name
Bit 7 6
5
4
3
2
Break Address Register High (BRKH) Bit 15 14 13 12 11 10
Break Address Register Low (BRKL) Bit 7 6
5
4
3
2
Break Status/Control Register (BRKSCR) BRKE BRKA
= Unimplemented
1 Bit 0 Addr.
9 Bit 8 $FE0C
1 Bit 0 $FE0D
$FE0E
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 SIM break flag control register (SBFCR)
on page 106, and the Break Interrupts subsection for each module.
3-brk
MOTOROLA
Break Module
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MC68HC08AZ0
141