mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 155

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

9.6.1.2 SWI Instruction
9.6.1.3 Interrupt Status Registers
9.6.1.4 Interrupt Status Register 1
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
NOTE:
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
Exception Control
R
1
0
0
Data Sheet
Bit 0
R
0
0
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