mc68hc908lb8 Freescale Semiconductor, Inc, mc68hc908lb8 Datasheet - Page 86

• Manufacturer Part Number: mc68hc908lb8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Keyboard Interrupt Module (KBI)
9.2 Features
Features include:
86
TO PULLUP ENABLE
TO PULLUP ENABLE
$001A
$001B
Addr.
•
•
•
•
•
Seven keyboard interrupt pins with separate keyboard interrupt enable bits and one keyboard
interrupt mask
Hysteresis buffers
Programmable edge-only or edge- and level- interrupt sensitivity
Exit from low-power modes
I/O (input/output) port bit(s) software configurable with pullup device(s) if configured as input port
bit(s)
Keyboard Status and Control
KBI0
KBI6
Keyboard Interrupt Enable
Register Name
Register (INTKBSCR)
Register (INTKBIER)
VECTOR FETCH
KBIE0
KBIE6
INTERNAL BUS
DECODER
See page 89.
See page 90.
.
.
.
Reset:
Reset:
Figure 9-2. Keyboard Module Block Diagram
Read:
Read:
Write:
Write:
RESET
ACKK
Figure 9-3. I/O Register Summary
Bit 7
0
0
0
MC68HC908LB8 Data Sheet, Rev. 1
MODEK
= Unimplemented
KBIE6
V
6
0
0
0
DD
D
CK
CLR
KBIE5
5
0
0
0
Q
KBIE4
4
0
0
0
IMASKK
KBIE3
KEYF
SYNCHRONIZER
3
0
0
ACKK
KBIE2
2
0
0
0
KEYF
Freescale Semiconductor
IMASKK
KBIE1
1
0
0
KEYBOARD
INTERRUPT
REQUEST
MODEK
KBIE0
Bit 0
0
0