參數(shù)資料
型號: MC68HC08QT1CDW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8
封裝: EIAJ, SOIC-8
文件頁數(shù): 152/178頁
文件大小: 2311K
代理商: MC68HC08QT1CDW
Registers
MC68HC08QY/QT Family Data Sheet, Rev. 1
Freescale Semiconductor
75
8.8 Registers
The IRQ status and control register (INTSCR) controls and monitors operation of the IRQ module. The
INTSCR:
Shows the state of the IRQ flag
Clears the IRQ latch
Masks the IRQ interrupt request
Controls triggering sensitivity of the IRQ interrupt pin
IRQF — IRQ Flag Bit
This read-only status bit is set when the IRQ interrupt is pending.
1 = IRQ interrupt pending
0 = IRQ interrupt not pending
ACK — IRQ Interrupt Request Acknowledge Bit
Writing a 1 to this write-only bit clears the IRQ latch. ACK always reads 0.
IMASK — IRQ Interrupt Mask Bit
Writing a 1 to this read/write bit disables the IRQ interrupt request.
1 = IRQ interrupt request disabled
0 = IRQ interrupt request enabled
MODE — IRQ Edge/Level Select Bit
This read/write bit controls the triggering sensitivity of the IRQ pin.
1 = IRQ interrupt request on falling edges and low levels
0 = IRQ interrupt request on falling edges only
Bit 7
654321
Bit 0
Read:
0000
IRQF
0
IMASK
MODE
Write:
ACK
Reset:
00000000
= Unimplemented
Figure 8-3. IRQ Status and Control Register (INTSCR)
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