MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 327

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MC68HC708XL36

Manufacturer Part Number
MC68HC708XL36
Description
HCMOS Microcontroller Unit
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
I/O Registers
Keyboard Status
and Control
Register
7-intkbd8_a
MOTOROLA
Address: $001A
The following registers control and monitor operation of the keyboard
module:
The keyboard status and control register:
Bits 7–4 — Not used
KEYF — Keyboard Flag Bit
Reset:
Read:
Write:
These read-only bits always read as logic 0s.
This read-only bit is set when a keyboard interrupt is pending. Reset
clears the KEYF bit.
Freescale Semiconductor, Inc.
Figure 3. Keyboard Status and Control Register (KBSCR)
For More Information On This Product,
1 = Keyboard interrupt pending
0 = No keyboard interrupt pending
Keyboard status and control register (KBSCR)
Keyboard interrupt enable register (KBIER)
Flags keyboard interrupt requests.
Acknowledges keyboard interrupt requests.
Masks keyboard interrupt requests.
Controls keyboard interrupt triggering sensitivity.
Bit 7
0
0
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= Unimplemented
6
0
0
KBI
5
0
0
4
0
0
KEYF
3
0
ACKK
2
0
0
MC68HC708XL36
IMASKK
1
0
I/O Registers
MODEK
Bit 0
0
327
KBI

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