MC68HC908LJ12CPB FREESCALE [Freescale Semiconductor, Inc], MC68HC908LJ12CPB Datasheet - Page 144

• Manufacturer Part Number: MC68HC908LJ12CPB
• Description: 8-bit microcontroller units
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

9.6.1.2 SWI Instruction
9.6.1.3 Interrupt Status Registers
9.6.1.4 Interrupt Status Register 1
MC68HC908LJ12
Freescale Semiconductor
NOTE:
—
Rev. 2.1
Address:
The SWI instruction is a non-maskable instruction that causes an
interrupt regardless of the state of the interrupt mask (I bit) in the
condition code register.
A software interrupt pushes PC onto the stack. A software interrupt does
not push PC – 1, as a hardware interrupt does.
The flags in the interrupt status registers identify maskable interrupt
sources.
status register flags that they set. The interrupt status registers can be
useful for debugging.
IF6–IF1 — Interrupt Flags 6–1
Bit 0 and Bit 1 — Always read 0
Reset:
Read:
Write:
These flags indicate the presence of interrupt requests from the
sources shown in
1 = Interrupt request present
0 = No interrupt request present
$FE04
Bit 7
IF6
Table 9-3
R
R
0
System Integration Module (SIM)
Figure 9-12. Interrupt Status Register 1 (INT1)
= Reserved
IF5
R
6
0
summarizes the interrupt sources and the interrupt
Table
IF4
R
5
0
9-3.
IF3
R
4
0
IF2
R
3
0
System Integration Module (SIM)
IF1
R
2
0
R
1
0
0
Technical Data
Bit 0
R
0
0
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