Freescale Semiconductor MC68HC08KH12 - Manual (Page 232)

Advance Information MC68HC(7)08KH12 — Rev. 1.1
232 Freescale Semiconductor
ACKE — Port-E Keyboard Acknowledge Bit
Writing a logic 1 to this write-only bit clears the keyboard interrupt
request on port-E. ACKE always reads as logic 0. Reset clears ACKE.
IMASKE — Port-E 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-E.
Reset clears the IMASKE bit.
1 = Keyboard interrupt requests masked
0 = Keyboard interrupt requests not masked
MODEE — Port-E Keyboard Triggering Sensitivity Bit
This read/write bit controls the triggering sensitivity of the keyboard
interrupt pins on port-E. Reset clears MODEE.
1 = Keyboard interrupt requests on falling edges and low levels
0 = Keyboard interrupt requests on falling edges only
15.5.3.2 Port-E Keyboard Interrupt Enable Register
The port-E keyboard interrupt enable register enables or disables each
port-E pin to operate as a keyboard interrupt pin and to enable and
disable the pullup device on each port-E pin.
PEPE3–PEPE0 — Port-E Pull-up Enable Bits
Each of these read/write bits enable or disable the pull-up device on
the corresponding port-E pin. Reset clears these bits.
1 = PEPEx pull-up device enabled.
0 = PEPEx pull-up device disabled.
Address: $000F
Bit 7 6 5 4 3 2 1 Bit 0
Read:
PEPE3 PEPE2 PEPE1 PEPE0 KBEIE3 KBEIE2 KBEIE1 KBEIE0
Write:
Reset: 0 0 0 0 0 0 0 0
Figure 15-6. Port-E Keyboard Interrupt Enable Register (KBEIER)