Freescale Semiconductor, Inc.
November 5, 1998
GENERAL RELEASE SPECIFICATION
SECTION 4
INTERRUPTS
The MCU can be interrupted in six different ways:
•
•
•
•
•
•
Non-maskable Software Interrupt Instruction (SWI)
External Asynchronous Interrupt (IRQ)
External Interrupt via IRQ on PA0-PA3 (mask option)
USB Interrupt
Timer1 Interrupt (16-bit Timer)
Multi-Function Timer Interrupt
4.1
INTERRUPT VECTORS
Table 4-1. Reset/Interrupt Vector Addresses
Global
Hardware Software
Local
Control
Bit
Priority
(1 = Highest)
Vector
Address
Function
Source
Mask
Mask
Power-On Logic
RESET Pin
Low Voltage Reset
Illegal Address Reset
Reset
—
—
—
1
$1FFE–$1FFF
COP Watchdog
User Code
Software
Interrupt (SWI)
Same Priority
As Instruction
—
—
—
—
$1FFC–$1FFD
$1FFA–$1FFB
External
Interrupt (IRQ)
IRQ Pin
I Bit
IRQE Bit
2
3
TXD0F
TXD1F
RESUMP
TXD0IE
TXD1IE
—
USB
Interrupts
—
I Bit
$1FF8–$1FF9
ICF Bit
OCF Bit
TOF Bit
ICIE Bit
OCIE Bit
TOIE Bit
Timer1
Interrupts
—
—
I Bit
I Bit
4
5
$1FF6–$1FF7
$1FF4–$1FF5
MFT
Interrupts
CTOF Bit
RTIF Bit
CTOFE Bit
RTIE Bit
Reserved
Reserved
$1FF2–$1FF3
$1FF0–$1FF1
MC68HC05JB3
REV 1
INTERRUPTS
MOTOROLA
4-1
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