Featured Products Ideal for a wide range of applications, from portables to automotive 4-Wire Resistive Touchscreen Controllers BU210xx Series Marketproven 500k to 1Mpcs shipped/month Enables multi-touch operation in existing 4-wire resistive touch panel systems No ghosting Broad lineup 10:35:08 文 + + 文 + P ZOOM SET DISP MENU 文 ー Compatible with conventional 4-wire resistive touchscreens Enabling multi-touch detection Resistive Touch vs. Capacitive Touch Systems Problems with conventional systems Resistive Touch ■ Conventional resistive multi-touch systems utilize multiple wires or a matrix configuration, necessitating significant panel modifications ■ Obstacles related to implementation methods, costs, and noise resistance make the switch to capacitive touch systems difficult HOST Processor ROHM Resistive Touchscreen Controller Application Circuit Diagram YP 4-Wire Resistive Touch Panel XP HOST Touch Controller I2C or SPI YN XN No panel changes necessary No extra parts required Touchscreen IC High noise immunity I C Wire, etc. 2 HOST Processor Mounted on mainboard No. of Ch Cost Cover Glass Noise Immunity EMI Resistive Touch 4 Low Not required High Small Capacitive Touch 30+ High Required Low Large ROHM Resistive LCD 4 Lines Includes external parts mounted on FPC Touch IC Capacitive Panel LCD ■ Dedicated analog signal processing and operating sequence analysis enables 2-point coordinate separation during 1-point detection sampling using existing 4-wire signal lines Cover Glass FPC Resistive Panel ROHM Technology Capacitive Touch ADC (10bit) Panel ( ) Work memory I/F EEPROM I/F CPU (8bit) Filter ECL EDA REG XP Program memory XN Panel YP I/F YN Clock generator register SDA_SIO SCL_SCK SEL_CSB IFSEL INT Host I/F 4-Wire Type Automotive-Grade 2-Point Touch BU21024FV-M A/D Converter (10bit) VREF Digital Filter AUX T4 T3 T2 T1 VSS RSTB PVDD AVDD DVDD DVDD_EXT Regulator SAR ADC PGND Osc CLK_EXT REG Pen Detection SPI/I 2C Interface CPU Built-In (with Gesture and Noise Filter functions) Supply Voltage: 2.7 to 3.6V Package: SSOP-B28 (10×7.6, t=1.15mm) 4-Wire Type 2-Point Touch A/D Converter (12bit) WL-CSP (Wafer Level CSP) BU21029GUL OSC INT Control Logic SDA 2 wire serial I/F AD0 SCL AD1 RSTB GND XP XN YP YN XPM XNM YPM YNM BU21029GUL VDD BU21024FV-M BU21023MUV/GUL PVDD VDD Block Diagrams I 2C Interface No CPU (saving space and energy) Supply Voltage: 1.65 to 3.6V Package: VCSP50L2 (2×2, t=0.55mm) Lineup Touchscreen Controllers Capacitive Type Part No. Supply Voltage (V) BU21101MWX Resistive Type 2.7 to 3.6 MCU Touch Detection 32bit 5-point Host I/F No. of Ch Sensing Method Panel Size (in) Package 32 Mutual 5 UQFN040X5050M Standby Current (μA) Operating Current Host I/F Operating Temp. Range (°C) Package I 2C Supply Voltage (V) MCU Resolution Touch Detection BU21021GUL 2.7 to 3.6 32bit 4096×4096 2-/1-point 60 4.0mA I2C/SPI -20 to +85 2.65×2.70 t=0.55 BU21029GUL 1.65 to 3.6 - 4096×4096 2-/1-point 100 0.8mA IC -20 to +85 VCSP50L2 2.0×2.0 t=0.55 NEW BU21029MUV 1.65 to 3.6 - 4096×4096 2-/1-point 100 0.8mA I2C -20 to +85 VQFN020V4040 BU21024FV-M 2.7 to 3.6 8bit 1024×1024 2-/1-point 60 4.0mA I2C/SPI -40 to +85 BU21023GUL 2.7 to 3.6 8bit 1024×1024 2-/1-point 60 4.0mA I C/SPI -20 to +85 SSOP-B28 VCSP50L2 2.6×2.6 t=0.55 BU21023MUV 2.7 to 3.6 8bit 1024×1024 2-/1-point 60 4.0mA I2C/SPI -20 to +85 VQFN028V5050 BU21025GUL 1.65 to 3.6 - 4096×4096 1-point 0.8 120μA I2C -30 to +85 1.5×2.0 t=0.55 Part No. 2 2 VCSP50L2 VCSP50L2 Under Development ROHM User Interface Resistive Touchscreens Capacitive Touchscreens A broad lineup is offered that supports High noise immunity touchscreen controller utilizing a proprietary mutual-type, 1-layer multitouch AFE* virtually any requirements, including single-/dual-touch operation, automotive- *AFE: Analog Front End grade reliability, and even sets with no MCU. 2:13 Serch gle E nt krip for er igp ipopo rip ew vk0 rg9 bd;::se @pc@ N um sdf e;rp pv@ be :lv@ -b@: ogieip rwm k0f r e9g d-fg0^ wv c.a;w: kp; M ai-9-0^0^ robh@:reo @c q:;]]x;c o[w l \-\fewlt:w w0vis ep[ v C al e4@ i@eo[@ we l [^g v Ph on Advanced UI control technologies cultivated through years of UI device development Touchscreens for PCs High accuracy, high noise cancelling technology based on over a decade of innovation eB oo Fu 2ld Musi c 0901ga Funga 2345 gagga 678 kfd irpv@ Intern et Can k nga Alarm Pho ne Boo k cel op.ne .jp Ky Mail oto Na gura Ca ll koue n Serial A/D Noise cancelling technology based on high S/N characteristics High sensitivity capacitance detection technology Capacitive Touch Switches High noise immunity switches developed using high-speed sensing technology The content specified in this document is correct as of September 1st, 2013. [O_015] 56O6714E 09.2013 PDF