Motor de Búsqueda de Datasheet de Componentes Electrónicos
Selected language     Spanish  ▼

Delete All
ON OFF
ALLDATASHEET.ES

X  

Preview PDF Download HTML

MC908QT2FQE Datasheet(PDF) 50 Page - Freescale Semiconductor, Inc

No. de Pieza. MC908QT2FQE
Descripción  M68HC08 Microcontrollers
Descarga  168 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricante  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC908QT2FQE Datasheet(HTML) 50 Page - Freescale Semiconductor, Inc

Back Button MC908QT2FQE Hoja de datos HTML 46Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 47Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 48Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 49Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 50Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 51Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 52Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 53Page - Freescale Semiconductor, Inc MC908QT2FQE Hoja de datos HTML 54Page - Freescale Semiconductor, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 50 / 168 page
background image
Auto Wakeup Module (AWU)
MC68HC908QY/QT Family Data Sheet, Rev. 6
50
Freescale Semiconductor
Figure 4-1. Auto Wakeup Interrupt Request Generation Logic
The auto wakeup RC oscillator is highly dependent on operating voltage and temperature. This feature is
not recommended for use as a time-keeping function.
The wakeup request is latched to allow the interrupt source identification. The latched value, AWUL, can
be read directly from the bit 6 position of PTA data register. This is a read-only bit which is occupying an
empty bit position on PTA. No PTA associated registers, such as PTA6 data, PTA6 direction, and PTA6
pullup exist for this bit. The latch can be cleared by writing to the ACKK bit in the KBSCR register. Reset
also clears the latch. AWUIE bit in KBI interrupt enable register (see Figure 4-1) has no effect on AWUL
reading.
The AWU oscillator and counters are inactive in normal operating mode and become active only upon
entering stop mode.
4.4 Wait Mode
The AWU module remains inactive in wait mode.
4.5 Stop Mode
When the AWU module is enabled (AWUIE = 1 in the keyboard interrupt enable register) it is activated
automatically upon entering stop mode. Clearing the IMASKK bit in the keyboard status and control
register enables keyboard interrupt requests to bring the MCU out of stop mode. The AWU counters start
from ‘0’ each time stop mode is entered.
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
(CGMXCLK)
BUSCLKX4
ISTOP
AWUIREQ
CLRLOGIC
RESET
AWUL
TO PTA READ, BIT 6
Q
AWUIE
TO KBI INTERRUPT LOGIC (SEE
Figure 9-2. Keyboard Interrupt
Block Diagram)


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88  89  90  91  92  93  94  95  96  97  98  99  100   ...More


Datasheet Download

Go To PDF Page


Enlace URL




Privacy Policy
ALLDATASHEET.ES
Does ALLDATASHEET help your business so far?  [ DONATE ]  

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Favorito   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn