MC68HC908LJ12CPB FREESCALE [Freescale Semiconductor, Inc], MC68HC908LJ12CPB Datasheet - Page 363

• Manufacturer Part Number: MC68HC908LJ12CPB
• Description: 8-bit microcontroller units
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Keyboard Interrupt Module (KBI)
19.3 Features
19.4 I/O Pins
Technical Data
364
$001C
$001B
Addr.
Generic Pin Name
Register Name
Keyboard Status and
Keyboard Interrupt
KBI0–KBI3
KBI4–KBI7
Control Register
Enable Register
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 19-1. KBI I/O Register Summary
Table 19-1. 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–PTD7/KBI7
Full MCU Pin Name
= Unimplemented
KBIE6
6
0
0
0
KBIE5
5
0
0
0
KBIE4
4
0
0
0
Pin Selected for KBI Function by
KBIE3
KEYF
Table
KBIEx Bit in KBIER
3
0
0
KBIE0–KBIE3
KBIE4–KBIE7
MC68HC908LJ12
19-1. The generic pin
ACKK
KBIE2
Freescale Semiconductor
2
0
0
0
IMASKK
KBIE1
1
0
0
—
MODEK
Rev. 2.1
KBIE0
Bit 0
0
0