Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

MC908QT2 Datasheet(PDF) 58 Page - Freescale Semiconductor, Inc

No. de pieza MC908QT2
Descripción Electrónicos  M68HC08 Microcontrollers
Download  184 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC908QT2 Datasheet(HTML) 58 Page - Freescale Semiconductor, Inc

Back Button MC908QT2 Datasheet HTML 54Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 55Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 56Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 57Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 58Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 59Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 60Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 61Page - Freescale Semiconductor, Inc MC908QT2 Datasheet HTML 62Page - Freescale Semiconductor, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 58 / 184 page
background image
Computer Operating Properly (COP)
MC68HC908QY/QT Family Data Sheet, Rev. 6
58
Freescale Semiconductor
The COP counter is a free-running 6-bit counter preceded by the 12-bit system integration module (SIM)
counter. If not cleared by software, the COP counter overflows and generates an asynchronous reset after
262,128 or 8176 BUSCLKX4 cycles; depending on the state of the COP rate select bit, COPRS, in
configuration register 1. With a 262,128 BUSCLKX4 cycle overflow option, the internal 12.8-MHz
oscillator gives a COP timeout period of 20.48 ms. Writing any value to location $FFFF before an overflow
occurs prevents a COP reset by clearing the COP counter and stages 12–5 of the SIM counter.
NOTE
Service the COP immediately after reset and before entering or after exiting
stop mode to guarantee the maximum time before the first COP counter
overflow.
A COP reset pulls the RST pin low (if the RSTEN bit is set in the CONFIG1 register) for 32
× BUSCLKX4
cycles and sets the COP bit in the reset status register (RSR). See 13.8.1 SIM Reset Status Register.
NOTE
Place COP clearing instructions in the main program and not in an interrupt
subroutine. Such an interrupt subroutine could keep the COP from
generating a reset even while the main program is not working properly.
6.3 I/O Signals
The following paragraphs describe the signals shown in Figure 6-1.
6.3.1 BUSCLKX4
BUSCLKX4 is the oscillator output signal. BUSCLKX4 frequency is equal to the internal oscillator
frequency, the crystal frequency, or the RC-oscillator frequency.
6.3.2 STOP Instruction
The STOP instruction clears the SIM counter.
6.3.3 COPCTL Write
Writing any value to the COP control register (COPCTL) (see 6.4 COP Control Register) clears the COP
counter and clears stages 12–5 of the SIM counter. Reading the COP control register returns the low byte
of the reset vector.
6.3.4 Power-On Reset
The power-on reset (POR) circuit in the SIM clears the SIM counter 4096
× BUSCLKX4 cycles after
power up.
6.3.5 Internal Reset
An internal reset clears the SIM counter and the COP counter.
6.3.6 COPD (COP Disable)
The COPD signal reflects the state of the COP disable bit (COPD) in the configuration register 1
(CONFIG1). See Chapter 5 Configuration Register (CONFIG).


Número de pieza similar - MC908QT2

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Freescale Semiconductor...
MC908QT2 FREESCALE-MC908QT2 Datasheet
1Mb / 184P
   Microcontrollers
MC908QT2 FREESCALE-MC908QT2 Datasheet
1Mb / 184P
   Microcontrollers
MC908QT2 FREESCALE-MC908QT2 Datasheet
1Mb / 184P
   M68HC08 Microcontrollers
MC908QT2A FREESCALE-MC908QT2A Datasheet
1Mb / 200P
   Microcontrollers
MC908QT2A FREESCALE-MC908QT2A Datasheet
2Mb / 200P
   Microcontrollers
More results

Descripción similar - MC908QT2

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Freescale Semiconductor...
MC68HC908JW32 FREESCALE-MC68HC908JW32_09 Datasheet
2Mb / 232P
   M68HC08 Microcontrollers
logo
Motorola, Inc
MC68HC908QT4CPE MOTOROLA-MC68HC908QT4CPE Datasheet
3Mb / 192P
   M68HC08 Microcontrollers
logo
Freescale Semiconductor...
MC68HC908JB8 FREESCALE-MC68HC908JB8 Datasheet
1Mb / 286P
   M68HC08 Microcontrollers
MC68HC908JB16 FREESCALE-MC68HC908JB16 Datasheet
3Mb / 332P
   M68HC08 Microcontrollers
MC68HC908QF4 FREESCALE-MC68HC908QF4 Datasheet
2Mb / 196P
   M68HC08 Microcontrollers
MC908AS60ACFU FREESCALE-MC908AS60ACFU Datasheet
2Mb / 414P
   M68HC08 Microcontrollers
MC68HC908KX8 FREESCALE-MC68HC908KX8 Datasheet
1Mb / 210P
   M68HC08 Microcontrollers
MC68HC908LJ24 FREESCALE-MC68HC908LJ24 Datasheet
4Mb / 464P
   M68HC08 Microcontrollers
MC68HC908QC16 FREESCALE-MC68HC908QC16_08 Datasheet
3Mb / 274P
   M68HC08 Microcontrollers
MC68HC908QY4 FREESCALE-MC68HC908QY4_10 Datasheet
2Mb / 168P
   M68HC08 Microcontrollers
MC68908GZ16CFJE FREESCALE-MC68908GZ16CFJE Datasheet
4Mb / 314P
   M68HC08 Microcontrollers
More results


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 Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com