Freescale Semiconductor MC68HC08KH12 - Manual (Page 226)

Advance Information MC68HC(7)08KH12 — Rev. 1.1
226 Freescale Semiconductor
KEYDF — Port-D Keyboard Flag Bit
This read-only bit is set when a keyboard interrupt is pending on
port-D. Reset clears the KEYDF bit.
1 = Keyboard interrupt pending
0 = No keyboard interrupt pending
ACKD — Port-D Keyboard Acknowledge Bit
Writing a logic 1 to this write-only bit clears the keyboard interrupt
request on port-D. ACKD always reads as logic 0. Reset clears
ACKD.
IMASKD — Port-D Keyboard Interrupt Mask Bit
Writing a logic 1 to this read/write bit prevents the output of the
keyboard interrupt mask from generating interrupt requests on port-D.
Reset clears the IMASKD bit.
1 = Keyboard interrupt requests masked
0 = Keyboard interrupt requests not masked
MODED — Port-D Keyboard Triggering Sensitivity Bit
This read/write bit controls the triggering sensitivity of the keyboard
interrupt pins on port-D. Reset clears MODED.
1 = Keyboard interrupt requests on falling edges and low levels
0 = Keyboard interrupt requests on falling edges only
15.4.3.2 Port-D Keyboard Interrupt Enable Register
The port-D keyboard interrupt enable register enables or disables each
port-D pin to operate as a keyboard interrupt pin.
Address: $000D
Bit 7 6 5 4 3 2 1 Bit 0
Read:
KBDIE7 KBDIE6 KBDIE5 KBDIE4 KBDIE3 KBDIE2 KBDIE1 KBDIE0
Write:
Reset: 0 0 0 0 0 0 0 0
Figure 15-3. Port-D Keyboard Interrupt Enable Register (KBDIER)