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參數(shù)資料
| 型號(hào)： | MC68HC05RC16P |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| 封裝： | PLASTIC, DIP-28 |
| 文件頁數(shù)： | 60/122頁 |
| 文件大?。?/td> | 2962K |
| 代理商： | MC68HC05RC16P |
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Interrupts
General Release Specification
MC68HC05RC16 — Rev. 3.0
Interrupts
When edge sensitivity is selected for the IRQ interrupt, it is sensitive to
these cases:
1. Falling edge on the IRQ pin
2. Falling edge on any port B pin with pullup enabled
When edge and level sensitivity is selected for the IRQ interrupt, it is
sensitive to these cases:
1. Low level on the IRQ pin
2. Falling edge on the IRQ pin
3. Falling edge or low level on any port B pin with pullup enabled
External interrupts also can be masked by setting the EIMSK bit in the
MSCR register of the IR remote timer. See 9.5.4 Modulator Period
Data Registers (MDR1, MDR2, and MDR3) for details.
4.8 External Interrupt Timing
If the interrupt mask bit (I bit) of the CCR is set, all maskable interrupts
(internal and external) are disabled. Clearing the I bit enables interrupts.
The interrupt request is latched immediately following the falling edge of
the IRQ source. It is then synchronized internally and serviced as
specified by the contents of $3FFA and $3FFB.
Either a level-sensitive and edge-sensitive trigger or an
edge-sensitive-only trigger is available via the mask programmable
option for the IRQ pin.
4.9 Carrier Modulator Transmitter Interrupt (CMT)
A CMT interrupt occurs when the end of cycle flag (EOC) and the end of
cycle interrupt enable (EOCIE) bits are set in the modulator control and
status register (MCSR). This interrupt will vector to the interrupt service
routine located at the address specified by the contents of memory
locations $3FF8 and $3FF9.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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