IS31SE5104 4-CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE DESCRIPTION RECOMMENDED EQUIPMENT The IS31SE5104 is an ultra low power, fully integrated solution for capacitive touch applications with up to 4 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 IS31SE5104 is fully programmable via a 400kHz I2C serial bus protocol. 5.0V, 500mA power supply ABSOLUTE MAXIMUM RATINGS ≤ 5.5V power supply Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. PROCEDURE FEATURES Supply voltage from 2.7V to 5.5V I2C interface, 1.8V/2.8V is allowed Auto offset compensation Fully integrated sense controller with 4 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-16 (3mm × 3mm) The IS31SE5104 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. 1) 2) Connect the ground lead of the power supply to the EVB GND terminal and the positive lead to the EVB VCC terminal. Or use the connector (DC IN) with a power adaptor: jack size 3.5mm x 1.35mm. Turn on the power supply and pay attention to the supply current. If the current exceeds 100mA, please check for a circuit fault. EVALUATION BOARD OPERATION QUICK START This evaluation board is controlled pre-programmed P89LPC922 (80C51 core). by a IS31SE5104 evaluation board has 4 touch surfaces designed on a 2mm thick acrylic board to induce a dielectric. Each touch surface has an associated LED that will light when the corresponding surface area is touched. CBODY LED CPCB IS31SE5104 Figure 2: Capacitance Detection Figure 1: Photo of IS31SE5104 Evaluation Board The capacitance (CBODY) of an approaching finger increases as it approaches the sense area. The IS31SE5104 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. – www.issi.com Rev. A, 11/19/2014 1 IS31SE5104 4-CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE ORDERING INFORMATION Part No. Temperature Range Package IS31SE5104-QFLS2-EB -40°C ~ +85°C (Industrial) QFN-16, Lead-free Table 1: Ordering Information For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing team at [email protected] or (408) 969-6600. U2 3V U3 VCC CON1 DC IN EXT 1 SDA SCL SDB 20 19 18 10 14 3V 1 TP2 C1 10uF VDD 3 C3 1uF 5 SD 2 TP1 VOUT C5 1uF C4 10nF GND BP 4 P0.0/CMP2/KBI0 VDD P0.1/CIN2B/KBI1 P0.2/CIN2A/KBI2 P0.3/CIN1B/KBI3 P0.4/CIN1A/KBI4 P1.2/T0/SCL P0.5/CMPREF/KBI5 P0.6/CMP1/KBI6 P0.7/T1/KBI7 P1.0/TXD P1.1/RXD P1.5/RST C6 15 0.1uF TP3 17 16 13 12 11 4 P0.4 P0.5 3V P0.5 P0.4 RST GND TXD RXD RST 5 4 3 2 1 ICP LDO TP5 SDB SCL SDA INT GND JP1 OPEN=EXT CTRL EXT 9 5 4 3 2 1 3 2 P1.3/INT0/SDA P1.6 P1.7 P3.1/XTAL1 P1.4/INT1 P3.0XTAL2/CLKOUT VSS 6 8 7 RXD INT TXD 1 2 3 5 TP4 LPC922 VCC R4 R1 R3 R2 10K 10K 4.7K 4.7K U1 IS31SE5104 VCC 1 VCC C2 0.1uF 14 16 KEY PAD R5 KEY1 2 SD INTB SDA SCL AD 10 9 8 6 7 VCC SDB INT SDA SCL D4 D3 D2 D1 GND GND Cap1 510 R6 KEY2 3 Cap2 510 R7 KEY3 OUT4 4 Cap3 510 OUT3 OUT2 R8 KEY4 5 Cap4 510 C10 NC C9 NC C8 NC OUT1 15 R16 13 R15 12 R14 11 R13 1K C7 NC Figure 3: IS31SE5104 Application Schematic Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 11/19/2014 2 IS31SE5104 4-CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE BILL OF MATERIALS Name Symbol Touch Sensor U1 MCU Description Qty. Supplier Part No. Capacitive touch sensor 1 ISSI IS31SE5104 U2 Microcontroller 1 NXP LPC922 LDO U3 Low-dropout regulator 1 PAM PAM3101 LED D1~D4 Diode, LED blue, SMD 4 Everlight 19-217/BHC-ZL1M2RY /3T Resistor R1,R4 RES,10k,1/16W,±5%,SMD 2 YAGEO RC0603FR-0710KL Resistor R2,R3 RES,4.7k,1/16W,±5%,SMD 2 YAGEO RC0603FR-074K7L Resistor R5~R8 RES,510,1/16W,±5%,SMD 4 YAGEO RC0603FR-07510RL Resistor R13~R16 RES,1k,1/16W,±5%,SMD 4 YAGEO RC0603FR-071KL Capacitor C1 CAP,10µF,16V,±20%,SMD 1 YAGEO CC0805JKX7R6BB106 Capacitor C2, C6 CAP, 0.1µF,16V,±20%,SMD 2 YAGEO CC0603JKX7R9BB104 Capacitor C3, C5 CAP, 1µF,16V,±20%,SMD 2 YAGEO CC0805JKX7R9BB105 Capacitor C4 CAP,10nF,16V,±20%,SMD 1 YAGEO CC0603JKX7R9BB103 Capacitor C7~C10 Not Connect 4 Bill of Materials, refer to Figure 3 above. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 11/19/2014 3 IS31SE5104 4-CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE Figure 4: Board Component Placement Guide - Top Layer Figure 5: Board PCB Layout - Top Layer Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 11/19/2014 4 IS31SE5104 4-CH CAPACITIVE TOUCH SENSOR EVALUATION BOARD GUIDE Figure 6: Board Component Placement Guide - Bottom Layer Figure 7: Board PCB Layout - Bottom Layer Copyright © 2014 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. – www.issi.com Rev. A, 11/19/2014 5