s908qy2ad1vdwer Freescale Semiconductor, Inc, s908qy2ad1vdwer Datasheet - Page 118

• Manufacturer Part Number: s908qy2ad1vdwer
• Description: Mc68hc908qt4a Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
13.6.1.2 SWI Instruction
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.
13.6.2 Interrupt Status Registers
The flags in the interrupt status registers identify maskable interrupt sources.
interrupt sources and the interrupt status register flags that they set. The interrupt status registers can be
useful for debugging.
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1. The I bit in the condition code register is a global mask for all interrupt sources except the SWI instruction.
Priority
Highest
Lowest
Reset
SWI instruction
IRQ pin
Timer channel 0 interrupt
Timer channel 1 interrupt
Timer overflow interrupt
Keyboard interrupt
ADC conversion complete interrupt
A software interrupt pushes PC onto the stack. A software interrupt does
not push PC – 1, as a hardware interrupt does.
Source
MC68HC908QYA/QTA Family Data Sheet, Rev. 2
Table 13-3. Interrupt Sources
NOTE
COCO
CH0F
CH1F
KEYF
IRQF
Flag
TOF
—
—
IMASKK
Mask
IMASK
CH0IE
CH1IE
TOIE
AIEN
—
—
(1)
Register
Table 13-3
Flag
IF14
IF15
INT
IF1
IF3
IF4
IF5
—
—
Freescale Semiconductor
summarizes the
$FFFC–$FFFD
$FFDE–$FFDF
$FFFE–$FFFF
$FFFA–$FFFB
$FFE0–$FFE1
$FFF6–$FFF7
$FFF4–$FFF5
$FFF2–$FFF3
Address
Vector