MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 172

• Manufacturer Part Number: MC68HC908KX2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Keyboard Interrupt Module (KBI)
13.3 Features
Technical Data
172
TO PULLUP
TO PULLUP
ENABLE
ENABLE
or KBD3
KBD0
KBD4
KB4IE or KB3IE
KB0IE



Figure 13-1. Keyboard Module Block Diagram
KBI features include:
•
•
•
•
•
Five keyboard interrupt pins, on the MC68HC908KX8, are with
separate keyboard interrupt enable bits and one keyboard
interrupt mask
Hysteresis buffers
Programmable edge-only or edge- and level-interrupt sensitivity
Automatic interrupt acknowledge
Exit from low-power modes
Keyboard Interrupt Module (KBI)
MODEK
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
V
''
D
CK
CLR
Q
INTERRUPT FF
KEYBOARD
RESET
ACKK
IMASKK
SYNCHRONIZER
VECTOR FETCH
INTERNAL BUS
DECODER
KEYF
MOTOROLA
KEYBOARD
INTERRUPT
REQUEST