參數(shù)資料
型號： MC68HC05J1
廠商： Motorola, Inc.
英文描述： HCMOS MICROCONTROLLER UNIT
中文描述： HCMOS微控制器
文件頁數(shù)： 36/82頁
文件大?。?/td> 327K
代理商： MC68HC05J1
MOTOROLA
5-6
RESETS AND INTERRUPTS
MC68HC705J2
Rev. 2
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Either an edge-sensitive or an edge- and level-sensitive external interrupt trigger
is programmable in the mask option register.
Figure 5-4
shows the internal logic
of this programmable option.
Figure 5-4. External Interrupt Trigger Option
The edge- and level-sensitive trigger option allows multiple external interrupt
sources to be wire-ORed to the IRQ pin. With the level-sensitive trigger option, an
external interrupt request is latched as long as any source is holding the IRQ pin
low.
Setting the interrupt mask in the condition code register disables external
interrupts.
5.2.3 Software Interrupt
The software interrupt (SWI) instruction causes a nonmaskable interrupt.
VDD
D
C
Q
Q
R
EXTERNAL
INTERRUPT
REQUEST
EXTERNAL INTERRUPT
BEING SERVICED
(VECTOR FETCH)
RESET
INTERRUPT MASK
LEVEL SENSITIVE TRIGGER
(MOR OPTION)
IRQ
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