MC68HC05K1 FREESCALE [Freescale Semiconductor, Inc], MC68HC05K1 Datasheet - Page 51

• Manufacturer Part Number: MC68HC05K1
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

MC68HC05K0 • MC68HC05K1 — Rev. 2.0
NOTE:
Table 4-1
assignments.
If more than one interrupt request is pending, the CPU fetches the vector
of the higher priority interrupt first. A higher priority interrupt does not
interrupt a lower priority interrupt service routine unless the lower priority
interrupt service routine clears the I bit.
Function
interrupts
interrupts
1. The computer operating properly (COP) watchdog is a mask option.
2. The low-voltage reset function is a mask option.
3. Port A interrupt capability is a mask option.
Software
interrupt
External
Reset
Freescale Semiconductor, Inc.
(SWI)
Timer
For More Information On This Product,
summarizes the reset and interrupt sources and vector
Low-voltage
IRQ/V
watchdog
RESET pin
Table 4-1. Reset/Interrupt Vector Addresses
Go to: www.freescale.com
User code
PA3 pin
PA2 pin
PA1 pin
PA0 pin
Power-on
detect
address
RTIF bit
Source
TOF bit
Illegal
COP
logic
logic
PP
(2)
(3)
(3)
(3)
(3)
pin
Interrupts
(1)
IRQE bit
TOIE bit
RTIE bit
Local
Mask
None
None
Global
Mask
None
None
I bit
I bit
(1 = Highest)
Same priority
as instruction
Priority
1
2
3
Interrupt Processing
Vector Address
$03FC–$03FD
$03FE–$03FF
$03FA–$03FB
$03F8–$03F9
Technical Data
Interrupts