MC68HC08JK1 Datasheet, PDF (81/198 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
System Integration Module (SIM)
Exception Control
7.6.2.3 Interrupt Status Register 3
Address: $FE06
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
0
0
0
0
0
0
IF15
Write: R
R
R
R
R
R
R
R
Reset: 0
0
0
0
0
0
0
0
R = Reserved
Figure 7-14. Interrupt Status Register 3 (INT3)
IF15 — Interrupt Flags
These flags indicate the presence of interrupt requests from the
sources shown in Table 7-3.
1 = Interrupt request present
0 = No interrupt request present
Bit 1 to 7 — Always read 0
7.6.3 Reset
All reset sources always have equal and highest priority and cannot be
arbitrated.
7.6.4 Break Interrupts
The break module can stop normal program flow at a software-
programmable break point by asserting its break interrupt output. (See
Section 17. Break Module (BREAK).) The SIM puts the CPU into the
break state by forcing it to the SWI vector location. Refer to the break
interrupt subsection of each module to see how each module is affected
by the break state.
7.6.5 Status Flag Protection in Break Mode
The SIM controls whether status flags contained in other modules can
be cleared during break mode. The user can select whether flags are
MC68H(R)C08JL3 — Rev. 4
MOTOROLA
System Integration Module (SIM)
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Technical Data
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