BU21023GUL_16 Datasheet, PDF (1/21 Pages) Rohm – Resistive Type Touch Screen Controller ICs

Datasheet
Resistive Type Touch Screen Controller ICs
BU21023GUL BU21023MUV
General Description
Unlike most resistive touch screen controllers, the
BU21023 4-wire resistive touch screen controller
enables dual-touch detection and gesture recognition.
These intelligent controllers expose a set of registers to
a HOST processor and are configured through software.
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 screen development which reduces
development cost, and results in faster time to market
across a family of products.
Packages
VCSP50L2
VQFN028V5050
W(Typ) x D(Typ) x H(Max)
2.60mm x 2.60mm x 0.55mm
5.00mm x 5.00mm x 1.00mm
VCSP50L2
VQFN028V5050
Features
 Enables single touch, dual touch & gesture
recognition using standard 4-wire resistive touch
screens
 Adjustable touch detection threshold allows fine
tuning of pressure sensitivity for an application
 Enables measurement of single point touch
pressure
 SPI- and 2-wire serial interface for interfacing to
HOST processor
 Programmable interrupt polarity
 10-bit ADC provides sufficient resolution for finger
or stylus inputs
 Firmware for internal CPU may be downloaded
from HOST processor or from an EEPROM
 Includes filtering options to eliminate false
coordinates
 Built in support for intelligent calibration
 Easy to swap X & Y coordinates or adapt to
different touch screen connections
 Single 3V power supply
 Available in small packages and temperature
ranges
 Ideally suited for consumer
Applications
 Products with an LCD can benefit from pan and
zoom operations.
 Smart phones, Digital Cameras, Video Cameras,
GPS Receivers, Printers,
Copiers, automotive navigation screens, touch
kiosks
 Tablet PCs , Notebook PCs, LCD displays (with
USB interface)
Key Specifications and Lineup
Parameter
Screen
Maximum Detection Point
Integrated Filter Process
Gesture Detection
Supplied Voltage Range(V)
Temperature Range(°C)
Host I/F
Package
BU21023GUL
4-wire resistive
touch screen
2
Yes
Yes
2.7 to 3.6
-20 to +85
4-wire SPI
2-wire serial
VCSP50L2
BU21023MUV
4-wire resistive
touch screen
2
Yes
Yes
2.7 to 3.6
-20 to +85
4-wire SPI
2-wire serial
VQFN028V5050
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
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TSZ02201-0L5L0F300840-1-2
7.June.2016 Rev.004