mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 189

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 15
Keyboard Interrupt Module (KBI)
15.1 Introduction
The keyboard interrupt module (KBI) provides eight independently maskable external interrupts which are
accessible via PTA0–PTA7 pins.
15.2 Features
Features of the keyboard interrupt module include:
15.3 Pin Name Conventions
The eight keyboard interrupt pins are shared with standard port I/O pins. The full name of the KBI pins
are listed in
Freescale Semiconductor
$0016
$0017
Addr.
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•
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Eight 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
Keyboard Interrupt Enable
Generic Pin Name
Register Name
Table
and Control Register
KBA0–KBA7
Keyboard Status
KBI
15-1. The generic pin name appear in the text that follows.
(KBSCR)
Register
(KBIER)
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 15-1. KBI I/O Register Summary
Table 15-1. Pin Name Conventions
KBIE7
Bit 7
MC68HC908JW32 Data Sheet, Rev. 5
0
0
0
PTA0/KBA0–PTA7/KBA7
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
KBIE3
KEYF
by KBIEx Bit in KBIER
3
0
0
KBIE0–KBIE7
KBIE2
ACKK
2
0
0
0
IMASKK
KBIE1
1
0
0
MODEK
KBIE0
Bit 0
0
0
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