Freescale Semiconductor MC68HC08KH12 - Manual (Page 238)

Advance Information MC68HC(7)08KH12 — Rev. 1.1
238 Freescale Semiconductor
ACKF — Port-F Keyboard Acknowledge Bit
Writing a logic 1 to this write-only bit clears the keyboard interrupt
request on port-F. ACKF always reads as logic 0. Reset clears ACKF.
IMASKF — Port-F 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-F.
Reset clears the IMASKF bit.
1 = Keyboard interrupt requests masked
0 = Keyboard interrupt requests not masked
MODEF — Port-F Keyboard Triggering Sensitivity Bit
This read/write bit controls the triggering sensitivity of the keyboard
interrupt pins on port-F. Reset clears MODEF.
1 = Keyboard interrupt requests on falling edges and low levels
0 = Keyboard interrupt requests on falling edges only
15.6.3.2 Port-F Keyboard Interrupt Enable Register
The port-F keyboard interrupt enable register enables or disables each
port-F pin to operate as a keyboard interrupt pin.
KBFIE7–KBFIE0 — Port-F Keyboard Interrupt Enable Bits
Each of these read/write bits enables the corresponding keyboard
interrupt pin on port-F to latch interrupt requests. Reset clears the
keyboard interrupt enable register.
1 = KBFx pin enabled as keyboard interrupt pin
0 = KBFx pin not enabled as keyboard interrupt pin
Address: $0041
Bit 7 6 5 4 3 2 1 Bit 0
Read:
KBFIE7 KBFIE6 KBFIE5 KBFIE4 KBFIE3 KBFIE2 KBFIE1 KBFIE0
Write:
Reset: 0 0 0 0 0 0 0 0
Figure 15-9. Port-F Keyboard Interrupt Enable Register (KBFIER)