MC68HC08AZ32A Datasheet, PDF (379/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Keyboard Module (KBD)
I/O Registers
21.8 I/O Registers
The following registers control and monitor operation of the keyboard
module:
• Keyboard status and control register (KBSCR)
• Keyboard interrupt enable register (KBIER)
21.8.1 Keyboard Status and Control Register
The keyboard status and control register:
• Flags keyboard interrupt requests
• Acknowledges keyboard interrupt requests
• Masks keyboard interrupt requests
• Controls keyboard interrupt triggering sensitivity
Address: $001B
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
0
0
0
KEYF
0
IMASKK MODEK
Write:
ACKK
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 21-3. Keyboard Status and Control Register (KBSCR)
Bits 7–4 — Not used
These read-only bits always read as logic 0s.
KEYF — Keyboard Flag Bit
This read-only bit is set when a keyboard interrupt is pending. Reset
clears the KEYF bit.
1 = Keyboard interrupt pending
0 = No keyboard interrupt pending
MC68HC08AZ32A — Rev 1.0
MOTOROLA
Keyboard Module (KBD)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
379