BU21029GUL Datasheet, PDF (1/29 Pages) Rohm – 4-wire Resistive Touch Screen Controller

Datasheet
4-wire Resistive
Touch Screen Controller
BU21029GUL
●General Description
Unlike most resistive touch screen controllers, the
BU21029GUL 4-wire resistive touch-screen controller
can generate data that enables dual touch detection.
The Host processor can use this data to detect single
and dual point coordinates.
●Features
■ Single and dual touch detection for standard 4-wire
resistive touch screens
■ I2C-like interface for interfacing with the host
processor
■ 12-bit resolution
■ Single 1.65V to 3.60V supply
■ Power on reset
■ Auto power down control
■ Built-in clock oscillator circuit
●Key Specifications
■ Power supply voltage
■ Temperature range
■ Standby current
■ Sleep current
■ Operating current
■ Coordinate resolution
1.65[V]～3.60[V]
-20[℃]～85[℃]
1.0[uA] (Max.)
100[uA] (Typ.)
0.8[mA] (Typ.)
12bit
●Package
VCSP50L2
2.00 mm x 2.00 mm x 0.55(max) mm
●Applications
■ Equipment with built-in user interface for 4-wire
resistive touch screen
■ Portable information equipment like smart phones,
tablets, and PDAs
■ Audio-visual equipment like digital still cameras,
digital video cameras, and portable TVs
■ PCs or peripheral equipment like laptops, touch
screen monitors, and printers
●Typical Application Circuit
1 . 0uF
VDD
0 . 1uF
1 . 0uF
Host IO VDD
Y+
X-
4 - wire
resistive
touch
screen
X+
Y-
TVS diode
option(*3)
option(*1)
10ohm
1.0nF
10ohm
XP
XN
1.0nF
10ohm
YP
1.0nF
10ohm
YN
1.0nF
AUX
Option(*1) For Noise protection
Option(*2) Please connect to VDD, when use as slave address = "41h".
Option(*3) For ESD protection.
Regulator
Panel
I/F
BU(1A0D2bCit1) 029GUL
Host
I /F
OSC
Clock
generator
RSTB
SCL
SDA
INT
AD0
option(*2)
AD1
Host
( GPIO port )
〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays
.www.rohm.co.jp
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
1/26
TSZ02201-0Y1Y0F300120-1-2
11.Nov.2013 Rev.002