s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 241

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

ACKK — Keyboard Acknowledge Bit
IMASKK — Keyboard Interrupt Mask Bit
MODEK — Keyboard Triggering Sensitivity Bit
22.7.2 Keyboard Interrupt Enable Register
The keyboard interrupt enable register enables or disables each port G and each port H pin to operate as
a keyboard interrupt pin.
KBIE4–KBIE0 — Keyboard Interrupt Enable Bits
Freescale Semiconductor
Writing a logic 1 to this write-only bit clears the keyboard interrupt request. ACKK always reads as logic
0. Reset clears ACKK.
Writing a logic 1 to this read/write bit prevents the output of the keyboard interrupt mask from
generating interrupt requests. Reset clears the IMASKK bit.
This read/write bit controls the triggering sensitivity of the keyboard interrupt pins. Reset clears
MODEK.
Each of these read/write bits enables the corresponding keyboard interrupt pin to latch interrupt
requests. Reset clears the keyboard interrupt enable register.
1 = Keyboard interrupt requests masked
0 = Keyboard interrupt requests not masked
1 = Keyboard interrupt requests on falling edges and low levels
0 = Keyboard interrupt requests on falling edges only
1 = PDx pin enabled as keyboard interrupt pin
0 = PDx pin not enabled as keyboard interrupt pin
Address: $0021
Reset:
Read:
Write:
Figure 22-4. Keyboard Interrupt Enable Register (KBIER)
Bit 7
0
0
= Unimplemented
6
0
0
MC68HC908AZ32A Data Sheet, Rev. 2
5
0
0
KBIE4
4
0
KBIE3
3
0
KBIE2
2
0
KBIE1
1
0
KBIE0
Bit 0
0
I/O Registers
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