s908qc16vdse Freescale Semiconductor, Inc, s908qc16vdse Datasheet - Page 90

• Manufacturer Part Number: s908qc16vdse
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Keyboard Interrupt Module (KBI)
KEYF — Keyboard Flag Bit
ACKK — Keyboard Acknowledge Bit
IMASKK— Keyboard Interrupt Mask Bit
MODEK — Keyboard Triggering Sensitivity Bit
8.8.2 Keyboard Interrupt Enable Register (KBIER)
KBIER enables or disables each keyboard interrupt pin.
KBIE5–KBIE0 — Keyboard Interrupt Enable Bits
R — Reserved bit
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This read-only bit is set when a keyboard interrupt is pending.
Writing a 1 to this write-only bit clears the KBI request. ACKK always reads 0.
Writing a 1 to this read/write bit prevents the output of the KBI latch from generating interrupt requests.
This read/write bit controls the triggering sensitivity of the keyboard interrupt pins.
Each of these read/write bits enables the corresponding keyboard interrupt pin to latch KBI interrupt
requests.
This reserved bit should always be written to a 0 and will read 0.
1 = Keyboard interrupt pending
0 = No keyboard interrupt pending
1 = Keyboard interrupt requests disabled
0 = Keyboard interrupt requests enabled
1 = Keyboard interrupt requests on edge and level
0 = Keyboard interrupt requests on edge only
1 = KBIx pin enabled as keyboard interrupt pin
0 = KBIx pin not enabled as keyboard interrupt pin
Reset:
Reset:
Read:
Write:
Read:
Write:
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 4
Figure 8-3. Keyboard Status and Control Register (KBSCR)
Bit 7
Bit 7
Figure 8-4. Keyboard Interrupt Enable Register (KBIER)
0
0
0
0
= Unimplemented
= Unimplemented
R
6
0
0
6
0
KBIE5
5
0
0
5
0
KBIE4
4
0
0
4
0
KBIE3
KEYF
3
0
3
0
KBIE2
ACKK
2
0
0
2
0
IMASKK
KBIE1
1
0
1
0
Freescale Semiconductor
MODEK
KBIE0
Bit 0
Bit 0
0
0