Freescale Semiconductor MC68HC08KH12 manual Port-E Keyboard Interrupt Enable Register, 232

ACKE — Port-E Key board 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 Tr iggering 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.

Address:

Read:

Write:

Reset:

$000F
Bit 7	6	5	4	3	2	1	Bit 0
PEPE3	PEPE2	PEPE1	PEPE0	KBEIE3	KBEIE2	KBEIE1	KBEIE0
0	0	0	0	0	0	0	0

Figure 15-6. Port-E Keyboard Interrupt Enable Register (KBEIER)

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.

Advance Information	MC68HC(7)08KH12 — Rev. 1.1
232	Freescale Semiconductor