參數(shù)資料
型號: MC68HC08QT2CDWE
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8
封裝: LEAD FREE, EIAJ, SOIC-8
文件頁數(shù): 117/176頁
文件大?。?/td> 1124K
代理商: MC68HC08QT2CDWE
MC68HC08QY/QT Family Data Sheet, Rev. 2
Freescale Semiconductor
45
Chapter 4
Auto Wakeup Module (AWU)
4.1 Introduction
This section describes the auto wakeup module (AWU). The AWU generates a periodic interrupt during
stop mode to wake the part up without requiring an external signal. Figure 4-1 is a block diagram of the
AWU.
Figure 4-1. Auto Wakeup Interrupt Request Generation Logic
4.2 Features
Features of the auto wakeup module include:
One internal interrupt with separate interrupt enable bit, sharing the same keyboard interrupt vector
and keyboard interrupt mask bit
Exit from low-power stop mode without external signals
Selectable timeout periods
Dedicated low-power internal oscillator separate from the main system clock sources
Option to allow bus clock source to run the AWU if enabled in STOP
D
R
VDD
INT RC OSC
EN
32 kHz
CLK
RST
OVERFLOW
AUTOWUGEN
SHORT
COPRS (FROM CONFIG1)
1 = DIV 29
0 = DIV 214
E
RESET
ACKK
CLEAR
RST
RESET
CLK
BUSCLKX2
ISTOP
AWUIREQ
CLRLOGIC
RESET
AWUL
TO PTA READ, BIT 6
Q
AWUIE
TO KBI INTERRUPT LOGIC
BUSCLKX2
OSCENINSTOP (FROM CONFIG2)
M
U
X
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