mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 408

• Manufacturer Part Number: mc68hc908lj24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Keyboard Interrupt Module (KBI)
20.3 Features
20.4 I/O Pins
Data Sheet
408
$001C
$001B
Addr.
Notes:
1. Do not enable the KBI function if the pin is used for TIM / MMIIC function.
Generic Pin Name
Register Name
Keyboard Status and
Keyboard Interrupt
KBI0–KBI3
Control Register
Enable Register
KBI4
KBI5
KBI6
KBI7
KBI
(KBSCR)
(KBIER)
Features of the keyboard interrupt module include the following:
The eight keyboard interrupt pins are shared with standard port I/O pins.
The full name of the KBI pins are listed in
name appear in the text that follows.
Reset:
Reset:
Read:
Write:
Read:
Write:
•
•
•
•
Figure 20-1. KBI I/O Register Summary
Table 20-1. Pin Name Conventions
Eight keyboard interrupt pins with pullup devices
Separate keyboard interrupt enable bits and one keyboard
interrupt mask
Programmable edge-only or edge- and level- interrupt sensitivity
Exit from low-lower modes
KBIE7
Bit 7
0
0
0
Keyboard Interrupt Module (KBI)
PTA0/KBI0–PTA3/KBI3
PTD4/KBI4/T1CLK
PTD5/KBI5/T2CLK
Full MCU Pin Name
PTD6/KBI6/SCL
PTD7/KBI7/SDA
= Unimplemented
KBIE6
6
0
0
0
KBIE5
5
0
0
0
(1)
(1)
(1)
(1)
KBIE4
4
0
0
0
Pin Selected for KBI Function by
KBIE3
KEYF
MC68HC908LJ24/LK24 — Rev. 2.1
Table
KBIEx Bit in KBIER
3
0
0
KBIE0–KBIE3
KBIE4
KBIE5
KBIE6
KBIE7
20-1. The generic pin
ACKK
KBIE2
Freescale Semiconductor
2
0
0
0
IMASKK
KBIE1
1
0
0
MODEK
KBIE0
Bit 0
0
0