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參數資料
型號: MC68HC05C8A
廠商: Motorola, Inc.
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數: 43/158頁
文件大小: 773K
代理商: MC68HC05C8A
Interrupts
Hardware Controlled Interrupt Sequence
MC68HC05C8A
MC68HCL05C8A
MC68HSC05C8A
Rev. 5.0
Technical Data
MOTOROLA
Interrupts
43
4.3 Hardware Controlled Interrupt Sequence
Three functions (RESET, STOP, and WAIT) are not in the strictest sense
interrupts; however, they are acted upon in a similar manner. Flowcharts
for hardware interrupts are shown in
Figure 4-1
.
1.
RESET
A low input on the RESET input pin causes the program
to vector to its starting address, which is specified by the contents
of memory locations $1FFE and $1FFF. The I bit in the condition
code register is also set. Much of the MCU is configured to a
known state during this type of reset, as previously described in
Section 5. Resets
.
2.
STOP
The STOP instruction causes the oscillator to be turned
off and the processor to
sleep
until an external interrupt
(
IRQ) or
reset occurs.
3.
WAIT
The WAIT instruction causes all processor clocks to stop,
but leaves the timer clock running. This
rest
state of the
processor can be cleared by reset, an external interrupt (IRQ),
serial peripheral interface, serial communications interface, or
timer interrupt. These individual interrupts have no special wait
vectors.
4.4 Software Interrupt (SWI)
The software interrupt (SWI) is an executable instruction and a non-
maskable interrupt. It is executed regardless of the state of the I bit in the
CCR. If the I bit is 0 (interrupts enabled), SWI executes after interrupts
which were pending when the SWI was fetched but before interrupts
generated after the SWI was fetched. The interrupt service routine
address is specified by the contents of memory locations $1FFC and
$1FFD.
相關PDF資料
PDF描述
MC68HC05C9A 8-Bit Microcontroller(8位微控制器)
MC68HCL05C9A 8-Bit Microcontroller(8位微控制器)
MC68HSC05C9A 8-Bit Microcontroller(8位微控制器)
MC68HC05F2 8-Bit Microcontroller Units (MCU).(8位微控制器)
MC68HC05F6 8-Bit Microcontroller Units (MCU).(8位微控制器)
相關代理商/技術參數
參數描述
MC68HC05C8ACFN 制造商:Motorola Inc 功能描述:MicroController, 8-Bit, 44 Pin, Plastic, PLCC
MC68HC05C9 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:TECHNICAL DATA
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MC68HC05C9AB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
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