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MC908QY2ACPE Datasheet(PDF) 81 Page - Freescale Semiconductor, Inc

No. de Pieza. MC908QY2ACPE
Descripción  M68HC08 Microcontrollers
Descarga  200 Pages
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Fabricante  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
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MC908QY2ACPE Datasheet(HTML) 81 Page - Freescale Semiconductor, Inc

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Registers
MC68HC908QYA/QTA Family Data Sheet, Rev. 3
Freescale Semiconductor
81
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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