XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 438

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

Keyboard Module (KBD)
24.8.2 Keyboard Interrupt Enable Register
Technical Data
438
Address: $001B
ACKK — Keyboard Acknowledge Bit
IMASKK — Keyboard Interrupt Mask Bit
MODEK — Keyboard Triggering Sensitivity Bit
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
Reset:
Read:
Write:
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.
Figure 24-4. Keyboard Interrupt Enable Register (KBIER)
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
Bit 7
0
0
Keyboard Module (KBD)
= Unimplemented
6
0
0
5
0
0
KBIE4
4
0
KBIE3
3
0
MC68HC908AZ60A — Rev 2.0
KBIE2
2
0
KBIE1
1
0
MOTOROLA
KBIE0
Bit 0
0