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부품번호 | BU21024FV-M 기능 |
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기능 | Touch Screen Controller ICs | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 18 페이지수
Touch Screen Controller ICs
Resistive Type
Touch Screen Controller ICs
BU21023GUL, BU21023MUV, BU21024FV-M
No.11105EAT01
●Description
Unlike most resistive touch screen controllers, the BU21023/ BU21024 4-wire resistive touch screen controllers enable
dual-touch detection and gesture recognition. These intelligent controllers expose a set of registers to a host processor and
are software configurable. The controllers can detect single point coordinates, dual coordinates, pinch, spread, rotate left
and rotate right gestures, enabling pan and zoom operations in applications that previously had to rely exclusively on
capacitive touch technology. Resistive touch does not require custom panel development which reduces development cost
and results in faster time to market across a family of products.
●Features
1) Enables single touch, dual touch & gesture recognition using standard 4-wire resistive touch panels
2) Adjustable touch detection threshold allows fine tuning of pressure sensitivity for an application
3) Enables measurement of single point touch pressure
4) SPI and I2C like interface for interfacing to host processor
5) Programmable interrupt polarity
6) 10-bit ADC provides sufficient resolution for finger or stylus inputs
7) Firmware for internal CPU may be downloaded from Host processor or from an EEPROM
8) Includes filtering options to eliminate false coordinates
9) Built in support for intelligent calibration
10) Easy to swap X & Y coordinates or adapt to different touch panel connections
11) Single 3V power supply
12) Available in a range of small package sizes and temperature ranges
13) Ideally suited for large volume automotive, consumer and industrial applications
●Application
・Products with a LCD that can benefit from pan and zoom operations.
・Smart phones, Digital Cameras, Video Cameras, GPS Receivers, Printers,
Copiers, automotive navigation panels, touch kiosks
・Tablet PCs , Notebook computers, LCD displays (with USB interface)
●Line up matrix
Parameter
Screen
Maximum detection point
BU21023GUL
4-wire resistive
touch screen
2
BU21023MUV
4-wire resistive
touch screen
2
BU21024FV-M
4-wire resistive
touch screens
2
Integrated Filter process
Yes Yes Yes
Gesture Detection
Yes Yes Yes
Supplied Voltage Range(V)
2.7 - 3.6
2.7 - 3.6
2.7 - 3.6
Temperature Range(℃)
Host I/F
PKG
-20 - 85
4-wire SPI
2-wire serial
VCSP50L2
-20 - 85
4-wire SPI
2-wire serial
VQFN028V5050
-40 - 85
4-wire SPI
2-wire serial
SSOP-B28
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/17
2011.08 - Rev.A
BU21023GUL,BU21023MUV,BU21024FV-M
Technical Note
●HOST-I/F mode (2-wire serial)
(SCL=SCL_SCK, SDA=SDA_SI)
The 2-wire serial mode presents an I2C like interface for all practical purposes, but it is not a complete implementation
conforming to the I2C specification. The BU21023MUV/ BU21023GUL / BU21024FV-M devices can co-exist with other I2C
devices on the same bus. The slave address for 2-wire serial communication is 5Ch or 5Dh. This is determined by the
SEL_CSB pin.
SEL_CSB = “L”
SEL_CSB = “H”
: Slave address = 5Ch
: Slave address = 5Dh
SDA
tHD;STA
SSCCLL
Address
tSU;DAT
tHD;DAT
tSU;STO
ACK
Data
ACK
Data
ACK
Parameter
SCL clock frequency
START condition hold time
SCL “L”
SCL “H”
Data hold time
Data setup time
STOP condition setup time
Symbol
fSCL
tHD:STA
tLOW
tHIGH
tHD:DAT
tSU:DAT
tSU:STO
Min.
0
0.6
1.3
0.6
0.1
0.1
0.6
Limits
Typ.
-
-
-
-
-
-
-
Max.
400
-
-
-
-
-
-
Unit
kHz
µs
µs
µs
µs
µs
µs
Condition
・Write protocol
S SLAVE ADDRESS W A
7bit = 5Ch or 5Dh
・Read protocol
REGISTER
ADDRESS
8bit
S SLAVE ADDRESS W A
REGISTER
ADDRESS
7bit = 5Ch or 5Dh
8bit
from master to slave
from slave to master
A
WRITE DATA
AP
8bit
A S SLAVE ADDRESS R A
READ DATA
7bit = 5Ch or 5Dh
8bit
S = START condition
P = STOP condition
R = data direction READ (SDA HIGH)
W = data direction WRITE (SDA LOW)
A = acknowledge (SDA LOW)
N = not acknowledge (SDA HIGH)
NP
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
4/17
2011.08 - Rev.A
4페이지 BU21023GUL,BU21023MUV,BU21024FV-M
●Block Diagram / Description of each block
【BU21023GUL / BU21023MUV】
XP
XN
Panel
ADC
YP I/F (10bit)
YN
Filter
Work
Memory
EEPROM
I/F
CPU
(8bit)
Program
Memory
CLK_EXT
OSC
Clock
Generator
Regulator
Register
Host
I/F
ECL
EDA
SEL_CSB
SCL_SCK
SDA_SI
SO
INT
IFSEL
Technical Note
Screen I/F
ADC
OSC
Regulator
Clock Generator
CPU Core
Work memory
Program Memory
EEPROM I/F
Host I/F
4-wire resistive touch screen interface
10bit A/D converter
Internal 20MHz oscillator block with optional external clock input
Internal regulator provides 1.8V DVDD supply. DVDD can also be supplied from an
external source if DVDD_EXT pin is tied high.
System clock and timing generation (10MHz CPU clock)
For dual touch processing, programmability and host interface
Data memory for CPU
Program memory for CPU. Code can be downloaded by host processor or from an
external EEPROM
To connect to external EEPROM if downloading program memory from EEPROM. Use
of external EEPROM is optional.
4-wire SPI or 2-wire I2C like interface provides access to registers
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
7/17
2011.08 - Rev.A
7페이지 | |||
구 성 | 총 18 페이지수 | ||
다운로드 | [ BU21024FV-M.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
BU21024FV-M | Touch Screen Controller ICs | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |