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MC908QY1CDTE Datasheet(PDF) 52 Page - Freescale Semiconductor, Inc |
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MC908QY1CDTE Datasheet(HTML) 52 Page - Freescale Semiconductor, Inc |
52 / 184 page Auto Wakeup Module (AWU) MC68HC908QY/QT Family Data Sheet, Rev. 5 52 Freescale Semiconductor Bits 7–4 — Not used These read-only bits always read as 0s. KEYF — Keyboard Flag Bit This read-only bit is set when a keyboard interrupt is pending on port A or auto wakeup. Reset clears the KEYF bit. 1 = Keyboard/auto wakeup interrupt pending 0 = No keyboard/auto wakeup interrupt pending ACKK — Keyboard Acknowledge Bit Writing a 1 to this write-only bit clears the keyboard/auto wakeup interrupt request on port A and auto wakeup logic. ACKK always reads as 0.Reset clears ACKK. IMASKK— Keyboard Interrupt Mask Bit Writing a 1 to this read/write bit prevents the output of the keyboard interrupt mask from generating interrupt requests on port A or auto wakeup. Reset clears the IMASKK bit. 1 = Keyboard/auto wakeup interrupt requests masked 0 = Keyboard/auto wakeup interrupt requests not masked NOTE MODEK is not used in conjuction with the auto wakeup feature. To see a description of this bit, see 9.7.1 Keyboard Status and Control Register. 4.6.3 Keyboard Interrupt Enable Register The keyboard interrupt enable register (KBIER) enables or disables the auto wakeup to operate as a keyboard/auto wakeup interrupt input. AWUIE — Auto Wakeup Interrupt Enable Bit This read/write bit enables the auto wakeup interrupt input to latch interrupt requests. Reset clears AWUIE. 1 = Auto wakeup enabled as interrupt input 0 = Auto wakeup not enabled as interrupt input NOTE KBIE5–KBIE0 bits are not used in conjuction with the auto wakeup feature. To see a description of these bits, see 9.7.2 Keyboard Interrupt Enable Register. Address: $001B Bit 7 654321 Bit 0 Read: 0 AWUIE KBIE5 KBIE4 KBIE3 KBIE2 KBIE1 KBIE0 Write: Reset: 00000000 = Unimplemented Figure 4-4. Keyboard Interrupt Enable Register (KBIER) |
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