XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 437

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

24.8 I/O Registers
24.8.1 Keyboard Status and Control Register
MC68HC908AZ60A — Rev 2.0
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:
Figure 24-3. Keyboard Status and Control Register (KBSCR)
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•
•
•
•
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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.
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
Keyboard Module (KBD)
= Unimplemented
6
0
0
5
0
0
4
0
0
KEYF
3
0
ACKK
2
0
0
Keyboard Module (KBD)
IMASKK
1
0
Technical Data
I/O Registers
MODEK
Bit 0
0
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