công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

BU21023FV-ME2 bảng dữ liệu(PDF) 6 Page - Rohm

tên linh kiện BU21023FV-ME2
Giải thích chi tiết về linh kiện  Resistive Type Touch Screen Controller ICs
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  ROHM [Rohm]
Trang chủ  http://www.rohm.com
Logo ROHM - Rohm

BU21023FV-ME2 bảng dữ liệu(HTML) 6 Page - Rohm

Back Button BU21023FV-ME2 Datasheet HTML 2Page - Rohm BU21023FV-ME2 Datasheet HTML 3Page - Rohm BU21023FV-ME2 Datasheet HTML 4Page - Rohm BU21023FV-ME2 Datasheet HTML 5Page - Rohm BU21023FV-ME2 Datasheet HTML 6Page - Rohm BU21023FV-ME2 Datasheet HTML 7Page - Rohm BU21023FV-ME2 Datasheet HTML 8Page - Rohm BU21023FV-ME2 Datasheet HTML 9Page - Rohm BU21023FV-ME2 Datasheet HTML 10Page - Rohm Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 18 page
background image
Technical Note
6/17
www.rohm.com
2011.08 - Rev.A
© 2011 ROHM Co., Ltd. All rights reserved.
BU21023GUL,BU21023MUV,BU21024FV-M
Background Information
A resistive touch panel is made up of a multilayer sandwich of resistive films and protective coatings all sitting on top of an
LCD display. Resistive touch panels work by direct contact of a stylus or a finger flexing a pair of resistive films, hence any
blunt pointing instrument or a gloved finger may be used.
Touch panel resolution
The resolution of a touch panel is typically measured in dots per inch (dpi) and is a function of the physical size of the touch
panel and the ADC used in the conversion circuitry. For example, a 3”x5” panel used with the BU21023/BU21024 devices
can provide a theoretical resolution of 1024 /5 = 204 dpi. In the case of resistive touch panels, the direct contact nature of its
operation and finger thickness often impose an upper limit on the effective system resolution that may be achieved,
regardless of the resolution of the ADC itself.
Functional Description
The BU21023/BU21024 devices connect to a standard 4-wire resistive touch screen on one side and to a host processor on
the other side. The BU21024 includes four additional sense terminals allowing it to be used with either 4-wire or 8-wire
resistive touch screens. The BU21023/BU21024 include the analog and digital circuitry to process and provide dual touch
coordinate data and pinch, spread, rotate-right and rotate-left gesture information to the host CPU.
The BU21023/BU21024 devices include an internal CPU and provide a high degree of programmability by exposing a set of
registers that can be accessed by a host CPU through SPI or I
2C like serial interfaces. The IFSEL pin determines whether
SPI or I
2C like interface is selected, The BU21023/BU21024 devices include an INT pin whose polarity can be programmed
via registers. When an interrupt occurs, for example, due to touch detection, the host processor is required to read an
interrupt status register to determine the cause of the interrupt and take appropriate action.
The program memory of the internal CPU may be initialized via the host interface or via an external EEPROM. This is
selected by a register setting.
The BU21023/BU21024 devices support two sensing modes; continuous and interval sensing modes, that are register
selectable. In the continuous sensing mode, the embedded CPU reads Z, X & Y coordinates continuously when a touch is
detected. The interval sensing mode allows a delay to be inserted between each cycle. The continuous sensing mode is
used more often though the interval sensing mode minimizes power consumption. The continuous sensing mode typically
completes a sampling cycle consisting of Z, X & Y measurements in approximately 2.3 mS.
The BU21023/BU21024 devices enable optimization of touch detection threshold for a given panel. They also include
several sophisticated calibration algorithms.
This document includes a description of the registers followed by flow charts that describe specific steps that a host
processor must follow. Often, a flow chart requires other flow charts to explain the steps in finer detail.
The document also includes information on touch screen parameters that one should to look for while selecting resistive
touch panels for multi-touch.


Số phần tương tự - BU21023FV-ME2

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Rohm
BU21023GUL ROHM-BU21023GUL Datasheet
717Kb / 8P
   Silicon monolithic IC
BU21023GUL ROHM-BU21023GUL Datasheet
419Kb / 18P
   Resistive Type Touch Screen Controller ICs
BU21023GUL ROHM-BU21023GUL Datasheet
1Mb / 21P
   Resistive Type Touch Screen Controller ICs
BU21023GUL-E2 ROHM-BU21023GUL-E2 Datasheet
1Mb / 21P
   Resistive Type Touch Screen Controller ICs
BU21023GUL ROHM-BU21023GUL_16 Datasheet
1Mb / 21P
   Resistive Type Touch Screen Controller ICs
More results

Mô tả tương tự - BU21023FV-ME2

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Rohm
BU21023GUL ROHM-BU21023GUL_16 Datasheet
1Mb / 21P
   Resistive Type Touch Screen Controller ICs
BU21024FV-M ROHM-BU21024FV-M_14 Datasheet
716Kb / 20P
   Resistive Type Touch Screen Controller ICs
BU21024FV ROHM-BU21024FV Datasheet
721Kb / 19P
   Resistive Type Touch Screen Controller ICs
BU21024FV-M ROHM-BU21024FV-M Datasheet
419Kb / 18P
   Resistive Type Touch Screen Controller ICs
logo
Microchip Technology
AR1000 MICROCHIP-AR1000_12 Datasheet
3Mb / 70P
   Resistive Touch Screen Controller
11/29/11
AR1000 MICROCHIP-AR1000 Datasheet
2Mb / 37P
   Resistive Touch Screen Controller
2009
logo
Rohm
BU21029MUV ROHM-BU21029MUV Datasheet
819Kb / 29P
   4-wire Resistive Touch Screen Controller
logo
Microchip Technology
AR1000 MICROCHIP-AR1000_16 Datasheet
2Mb / 61P
   AR1000 Series Resistive Touch Screen Controller
06/23/16
logo
Rohm
BU21025GUL ROHM-BU21025GUL Datasheet
741Kb / 19P
   4-wire Resistive Touch Screen Controller
BU21026MUV ROHM-BU21026MUV Datasheet
2Mb / 23P
   4-wire Resistive Touch Screen Controller
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
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