mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 344

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Keyboard Interrupt Module (KBI)
20.3 Features
20.4 I/O Pins
Data Sheet
344
$001A
$001B
Addr.
Keyboard Interrupt Enable
Generic Pin Name
Register Name
and Control Register
KBI0–KBI7
Register (KBIER)
Keyboard Status
KBI
(KBSCR)
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:
Read:
Write:
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)
PTD0/KBI0–PTD7/KBI7
Full MCU Pin Name
= Unimplemented
KBIE6
6
0
0
0
KBIE5
5
0
0
0
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
KBIE4
4
0
0
0
Pin Selected for KBI Function by
KBIE3
KEYF
Table
KBIEx Bit in KBIER
3
0
0
KBIE0–KBIE7
20-1. The generic pin
KBIE2
ACKK
Freescale Semiconductor
2
0
0
0
IMASKK
KBIE1
1
0
0
MODEK
KBIE0
Bit 0
0
0