參數(shù)資料
型號(hào)： MC68HC05P9AVDW
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝： SOIC-28
文件頁數(shù)： 25/90頁
文件大?。?/td> 285K
代理商： MC68HC05P9AVDW
GENERAL RELEASE SPECIFICATION
MC68HC05P9A
INTERRUPTS
MOTOROLA
Rev. 2.0
4-5
The IRQ pin is one source of an IRQ interrupt and a mask option can also enable
the port A pins (PA0 thru PA7) to act as other IRQ interrupt sources. These
sources are all combined into a single ORing function to be latched by the IRQ
latch.
Any enabled IRQ interrupt source sets the IRQ latch on the falling edge of the IRQ
pin or a port A pin if port A interrupts have been enabled. If edge-only sensitivity is
chosen by a mask option, only the IRQ latch output can activate a request to the
CPU to generate the IRQ interrupt sequence. This makes the IRQ interrupt
sensitive to the following cases:
1.
Falling edge on the IRQ pin with all enabled port A interrupt pins at a
high level.
2.
Falling edge on any enabled port A interrupt pin with all other enabled
port A interrupt pins and the IRQ pin at a high level.
If level sensitivity is chosen, the active high state of the IRQ input can also activate
an IRQ request to the CPU to generate the IRQ interrupt sequence. This makes
the IRQ interrupt sensitive to the following cases:
1.
Low level on the IRQ pin.
2.
Falling edge on the IRQ pin with all enabled port A interrupt pins at a
high level.
3.
Low level on any enabled port A interrupt pin.
4.
Falling edge on any enabled port A interrupt pin with all enabled port A
interrupt pins on the IRQ pin at a high level.
This interrupt is serviced by the interrupt service routine located at the address
specied by the contents of $1FFA and $1FFB. The IRQ latch is automatically
cleared by entering the interrupt service routine.
相關(guān)PDF資料
PDF描述
MC68HC05P9AVP 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC05P9AP 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC05P9ACDW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC05P9P 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC05P9CDW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05P9AVP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9DW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC05P9P 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC05PV8 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Techinal Data - rev 1.9
MC68HC05PV8A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Techinal Data - rev 1.9
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