参数资料
型号: MC68HSC05K0P
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PDIP16
封装: PLASTIC, DIP-16
文件页数: 102/154页
文件大小: 1544K
代理商: MC68HSC05K0P
Interrupts
Interrupt Processing
MC68HC05K0 MC68HC05K1 — Rev. 2.0
Technical Data
MOTOROLA
Interrupts
51
Table 4-1 summarizes the reset and interrupt sources and vector
assignments.
NOTE:
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.
Table 4-1. Reset/Interrupt Vector Addresses
Function
Source
Local
Mask
Global
Mask
Priority
(1 = Highest)
Vector Address
Reset
Power-on
logic
None
1
$03FE–$03FF
RESET pin
COP
watchdog(1)
1. The computer operating properly (COP) watchdog is a mask option.
Low-voltage
detect(2)
2. The low-voltage reset function is a mask option.
Illegal
address
logic
Software
interrupt
(SWI)
User code
None
Same priority
as instruction
$03FC–$03FD
External
interrupts
IRQ/VPP pin
IRQE bit
I bit
2
$03FA–$03FB
PA3 pin(3)
3. Port A interrupt capability is a mask option.
PA2 pin(3)
PA1 pin(3)
PA0 pin(3)
Timer
interrupts
TOF bit
TOIE bit
I bit
3
$03F8–$03F9
RTIF bit
RTIE bit
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