IS31SE CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE

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1 ISSE0 -CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE DESCRIPTION The ISSE0 is an ultra low power, fully integrated solution for capacitive touch applications with up to surfaces. The chip allows electrodes to project sense fields through any dielectric such as glass or plastic. On-chip calibration logic continuously monitors the environment and automatically adjusts on-and-off threshold levels to prevent false sensor activation. The ISSE0 is fully programmable via a 00kHz IC serial bus protocol. FEATURES Supply voltage from.7v to.v IC interface,.8v/.8v is allowed Auto offset compensation Fully integrated sense controller with capacitive touch inputs Interrupt driven output Adjustable sensitivity with external capacitor or by internal register Low power consumption ESD HBM 8kV IC controller in QFN-6 (mm mm) QUICK START RECOMMENDED EQUIPMENT.0V, 00mA power supply ABSOLUTE MAXIMUM RATINGS.V power supply Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. PROCEDURE The ISSE0 evaluation board is fully assembled and tested. Follow the steps listed below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. ) Connect the ground lead of the power supply to the EVB terminal and the positive lead to the EVB terminal. Or use the connector (DC IN) with a power adaptor: jack size.mm x.mm. ) Turn on the power supply and pay attention to the supply current. If the current exceeds 00mA, please check for a circuit fault. EVALUATION BOARD OPERATION This evaluation board is controlled by a pre-programmed P89LPC9 (80C core). ISSE0 evaluation board has touch surfaces designed on a mm thick acrylic board to induce a dielectric. Each touch surface has an associated LED that will light when the corresponding surface area is touched. LED C BODY C PCB ISSE0 Figure : Capacitance Detection Figure : Photo of ISSE0 Evaluation Board The capacitance (C BODY ) of an approaching finger increases as it approaches the sense area. The ISSE0 detects this increase in capacitance and turns on the associated LED. SOFTWARE SUPPORT Please refer to the integrated program. Please refer to the datasheet for more information. Integrated Silicon Solution, Inc. Rev. A, /9/0

2 ISSE0 -CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE ORDERING INFORMATION Part No. Temperature Range Package ISSE0-QFLS-EB -0 C ~ +8 C (Industrial) QFN-6, Lead-free Table : Ordering Information For pricing, delivery, and ordering information, please contacts ISSI s analog marketing team at analog@issi.com or (08) U V C6 U EXT P0.0/CMP/KBI0 VDD V 0 0.uF TP VDD VOUT P0./CINB/KBI CON 9 TP P0./CINA/KBI DC IN SDB 8 7 P0. V P0./CINB/KBI P0./CINA/KBI C 0 6 P0. P0. C C SD P./T0/ P0./CMPREF/KBI C uf P0. 0uF uf P0.6/CMP/KBI6 P0.7/T/KBI7 0nF TXD RST P.0/TXD RXD TP BP P./RXD RST P./RST ICP LDO JP OPEN=EXT CTRL EXT SDB TP 9 P./XTAL P./0/ P./ P.0XTAL/CLKOUT P.6 P.7 VSS LPC RXD TXD TP KEY PAD C 0.uF 6 U ISSE0 SD B AD SDB R R R R 0K 0K.7K.7K D D D D KEY R 0 Cap KEY KEY KEY R6 0 R7 0 R8 0 Cap Cap Cap OUT OUT OUT OUT R6 R R R K C0 C9 C8 C7 Figure : ISSE0 Application Schematic Integrated Silicon Solution, Inc. Rev. A, /9/0

3 ISSE0 -CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE BILL OF MATERIALS Name Symbol Description Qty. Supplier Part No. Touch Sensor U Capacitive touch sensor ISSI ISSE0 MCU U Microcontroller NXP LPC9 LDO U Low-dropout regulator PAM PAM0 LED D~D Diode, LED blue, SMD Everlight 9-7/BHC-ZLMRY /T Resistor R,R RES,0k,/6W,±%,SMD YAGEO RC060FR-070KL Resistor R,R RES,.7k,/6W,±%,SMD YAGEO RC060FR-07K7L Resistor R~R8 RES,0,/6W,±%,SMD YAGEO RC060FR-070RL Resistor R~R6 RES,k,/6W,±%,SMD YAGEO RC060FR-07KL Capacitor C CAP,0µF,6V,±0%,SMD YAGEO CC080JKX7R6BB06 Capacitor C, C6 CAP, 0.µF,6V,±0%,SMD YAGEO CC060JKX7R9BB0 Capacitor C, C CAP, µf,6v,±0%,smd YAGEO CC080JKX7R9BB0 Capacitor C CAP,0nF,6V,±0%,SMD YAGEO CC060JKX7R9BB0 Capacitor C7~C0 Not Connect Bill of Materials, refer to Figure above. Integrated Silicon Solution, Inc. Rev. A, /9/0

4 ISSE0 -CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE Figure : Board Component Placement Guide - Top Layer Figure : Board PCB Layout - Top Layer Integrated Silicon Solution, Inc. Rev. A, /9/0

5 ISSE0 -CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE Figure 6: Board Component Placement Guide - Bottom Layer Figure 7: Board PCB Layout - Bottom Layer Copyright 0 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized; b.) the user assume all such risks; and c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances Integrated Silicon Solution, Inc. Rev. A, /9/0