Datasheet

MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
178 Keyboard Interrupt Module (KBI) MOTOROLA
Keyboard Interrupt Module (KBI)
NON-DISCLOSURE AGREEMENT REQUIRED
14.3 Features
Features of the keyboard interrupt module include:
• Six keyboard interrupt pins with separate keyboard interrupt
enable bits and one keyboard interrupt mask
• One internal interrupt controlled by the auto wake-up logic, with
separate interrupt enable bit, sharing the same keyboard interrupt
mask
• Software configurable pullup device if input pin is configured as
input port bit
• Programmable edge-only or edge and level interrupt sensitivity
• Exit from low-power modes
Figure 14-1 provides a summary of the input/output (I/O) registers
Addr.Register Name Bit 7654321Bit 0
$001A
Keyboard Status
and Control Register
(KBSCR)
See page 183.
Read: 0000KEYF0
IMASKK MODEK
Write:
ACKK
Reset:00000000
$001B
Keyboard Interrupt Enable
Register (KBIER)
See page 184.
Read: 0
AWUIE KBIE5 KBIE4 KBIE3 KBIE2 KBIE1 KBIE0
Write:
Reset:00000000
= Unimplemented
Figure 14-1. KBI I/O Register Summary