
System Integration Module (SIM)
MC68HC908GR8 MC68HC908GR4 Data Sheet, Rev. 7
198
Freescale Semiconductor
19.5.1.5 Interrupt Status Register 2
IF14–IF8 — Interrupt Flags 14–7
These flags indicate the presence of interrupt requests from the sources shown in
Table 19-3.
1 = Interrupt request present
0 = No interrupt request present
Bit 0 — Always reads 0
19.5.1.6 Interrupt Status Register 3
Bits 7–2 — Always read 0
I16–I15 — Interrupt Flags 16–15
These flags indicate the presence of an interrupt request from the source shown in
Table 19-3.1 = Interrupt request present
0 = No interrupt request present
19.5.2 Reset
All reset sources always have equal and highest priority and cannot be arbitrated.
19.5.3 Break Interrupts
The break module can stop normal program flow at a software-programmable break point by asserting its
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.
Address:
$FE05
Bit 7
654321
Bit 0
Read:
IF14
IF13
IF12
IF11
IF10
IF9
IF8
0
Write:
RRRRRRRR
Reset:
00000000
R= Reserved
Figure 19-13. Interrupt Status Register 2 (INT2)
Address:
$FE06
Bit 7
654321
Bit 0
Read:
000000
I16
I15
Write:
RRRRRRRR
Reset:
00000000
R= Reserved
Figure 19-14. Interrupt Status Register 3 (INT3)