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

X  

AN2687 Datasheet(PDF) 14 Page - STMicroelectronics

No. de pieza AN2687
Descripción Electrónicos  STM8S20xxx LCD software driver
Download  22 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2687 Datasheet(HTML) 14 Page - STMicroelectronics

Back Button AN2687 Datasheet HTML 10Page - STMicroelectronics AN2687 Datasheet HTML 11Page - STMicroelectronics AN2687 Datasheet HTML 12Page - STMicroelectronics AN2687 Datasheet HTML 13Page - STMicroelectronics AN2687 Datasheet HTML 14Page - STMicroelectronics AN2687 Datasheet HTML 15Page - STMicroelectronics AN2687 Datasheet HTML 16Page - STMicroelectronics AN2687 Datasheet HTML 17Page - STMicroelectronics AN2687 Datasheet HTML 18Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 22 page
background image
Consumption considerations
AN2687
14/22
Doc ID 14296 Rev 1
4
Consumption considerations
The number of code lines the MCU has to execute to drive the LCD is the same whatever
the CPU frequency. It is then easy to understand that the faster the CPU clock, the faster
these code lines are executed, the less they represent in terms of CPU load, and the less
the MCU consumes.
In order to reduce consumption with both methods, the PCKEN (peripheral clock gating)
register of the Clock Controller is used in order to clock only the used peripherals. VDD can
also be decreased, especially in the first method (as the contrast can be compensated for by
software) to further reduce the consumption.
The consumption values obtained with the first method (at 3.3 V) are given in Table 2.
Note:
These typical values are given for guidance only. The LCD driver consumption is obtained
by subtracting the consumption of the MCU executing the LCD driver function and the
consumption of the MCU executing an empty loop (with all I/Os configured as output low
level).
The consumption values obtained with the second method (at 3.3 V) are given in Table 3.
Note:
These typical values are given for guidance only. The LCD driver consumption is obtained
by subtracting the consumption of the MCU executing the LCD driver function and the
consumption of the MCU executing an empty loop (with the MCU in AWU mode with all its
I/Os configured as output low level).
Table 2.
First method - consumption (Timer 2)
Clock master
Consumption of the MCU
executing LCD driver (mA)
Consumption of the
LCD driver (mA)
Consumption of the MCU
executing an empty loop
HSI
2.38
0.3
2.08
HSI/2
1.73
0.38
1.35
HSI/4
1.45
0.49
0.96
HSI/8
1.3
0.7
0.6
LSI
1.17
0.94
0.23
Table 3.
Second method - consumption (AWU)
Clock master
Consumption of the MCU
executing LCD driver (mA)
Consumption of the
LCD driver (mA)
Consumption of the MCU
executing an empty loop
HSI
1.08
0.36
0.72
HSI/2
1.12
0.4
0.72
HSI/4
1.26
0.51
0.75
HSI/8
1.34
0.58
0.76
LSI
1.02
0.33
0.69


Número de pieza similar - AN2687

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
STMicroelectronics
AN2680 STMICROELECTRONICS-AN2680 Datasheet
131Kb / 15P
   Fan speed controller based on STDS75 or STLM75 digital
AN2682 STMICROELECTRONICS-AN2682 Datasheet
164Kb / 15P
   This application note describes how to interface
AN2683 STMICROELECTRONICS-AN2683 Datasheet
598Kb / 38P
   Compact dual output point of load converter
AN2684 STMICROELECTRONICS-AN2684 Datasheet
769Kb / 21P
   The STEVAL-IFP006V1 demonstration board has been developed
AN2686 STMICROELECTRONICS-AN2686 Datasheet
525Kb / 11P
   Using the STVM100 to fully auto adjust LCD flicker
More results

Descripción similar - AN2687

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
STMicroelectronics
AN1048 STMICROELECTRONICS-AN1048 Datasheet
231Kb / 21P
   ST7 software LCD driver
logo
NXP Semiconductors
OL2385SWUG NXP-OL2385SWUG Datasheet
10Mb / 64P
   SIGFOX software driver
Rev. 2.1-6 April 2018
logo
STMicroelectronics
AN1447 STMICROELECTRONICS-AN1447 Datasheet
208Kb / 26P
   SOFTWARE DRIVER FOR 4-MULTIPLEXED LCD WITH A STANDARD ST62
UM1620 STMICROELECTRONICS-UM1620 Datasheet
1,015Kb / 41P
   Standard software driver for C90FL
UM0563 STMICROELECTRONICS-UM0563 Datasheet
536Kb / 46P
   L9952GXP software driver user manual
UM1627 STMICROELECTRONICS-UM1627 Datasheet
955Kb / 38P
   Standard software driver for C90LC Flash
UM1634 STMICROELECTRONICS-UM1634 Datasheet
1Mb / 43P
   Standard software driver for C90FL2 Flash
logo
Sony Corporation
CXA7000R SONY-CXA7000R Datasheet
278Kb / 23P
   LCD Driver
logo
Neotec Semiconductor Lt...
NT7107C NEOTEC-NT7107C Datasheet
547Kb / 21P
   LCD driver
Rev1.0 2015/08/17
NT7108C NEOTEC-NT7108C Datasheet
596Kb / 25P
   LCD driver
Rev1.0 2015/08/17
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


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