參數(shù)資料
型號: MC68HC08KH12A
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 149/178頁
文件大?。?/td> 925K
代理商: MC68HC08KH12A
MC68HC08KH12A Data Sheet, Rev. 1.1
Freescale Semiconductor
149
Chapter 15
Keyboard Interrupt Module (KBI)
15.1 Introduction
The keyboard module provides twenty independently maskable external interrupts which are accessible
via PTD7-PTD0, PTE3-PTE0 and PTF7-PTF0. Though the functionality of the three keyboard interrupts
on the three ports is similar, the implementation is quite different. On port-D, enabling keyboard interrupt
on a pin also enables its internal pull-up device. On port-E, the pull-up device is control by the PEPEx bit
resided in the Port-E Keyboard Interrupt Enable Register (KBEIER). On port-F, the pull-up device is
control by the PFPEx bit resided in the Port-F Control Register (PFPER).
15.2 Features
Twenty Keyboard Interrupt Pins with Separate Keyboard Interrupt Enable Bits and three Keyboard
Interrupt Masks.
Hysteresis Buffers
Internal Pull-ups.
Programmable Edge-Only or Edge- and Level- Interrupt Sensitivity
Exit from Low-Power Modes
Addr.
Register Name
Bit 7
0
6
0
5
0
4
0
3
2
0
1
Bit 0
$000C
Port D Keyboard Status and
Control Register
(KBDSCR)
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
KEYDF
IMASKD
MODED
ACKD
0
0
0
0
0
0
0
0
$000D
Port D Keyboard Interrupt
Enable Register
(KBDIER)
KBDIE7
KBDIE6
KBDIE5
KBDIE4
KBDIE3
KBDIE2
KBDIE1
KBDIE0
0
0
0
0
0
0
0
0
0
0
0
0
0
$000E
Port E Keyboard Status and
Control Register
(KBESCR)
KEYEF
IMASKE
MODEE
ACKE
0
0
0
0
0
0
0
0
$000F
Port E Keyboard Interrupt
Enable Register
(KBEIER)
PEPE3
PEPE2
PEPE1
PEPE0
KBEIE3
KBEIE2
KBEIE1
KBEIE0
0
0
0
0
0
0
0
0
0
0
0
0
0
$0040
Port F Keyboard Status and
Control Register
(KBFSCR)
KEYFF
IMASKF
MODEF
ACKF
0
0
0
0
0
0
0
0
$0041
Port F Keyboard Interrupt
Enable Register
(KBFIER)
KBFIE7
KBFIE6
KBFIE5
KBFIE4
KBFIE3
KBFIE2
KBFIE1
KBFIE0
0
0
0
0
0
0
0
0
$0042
Port F Pull-up Enable Register
(PFPER)
PFPE7
PFPE6
PFPE5
PFPE4
PFPE3
PFPE2
PFPE1
PFPE0
1
1
1
1
1
1
1
1
=Unimplemented
Figure 15-1. KBI I/O Register Summary
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