IS31SE5100-QFLS2-EB

IS31SE5100 8-CH Capacitive Touch Sensor Evaluation Board Guide DESCRIPTION RECOMMENDED EQUIPMENT The IS31SE5100 is an ultra low power, fully integrated solution for capacitive touch applications with up to 8 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 IS31SE5100 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 eight 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-24 (4mm × 4mm) The IS31SE5100 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 IS31SE5100 evaluation board has 8 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 IS31SE5100 Figure 2: Capacitance Detection Figure 1: Photo of IS31SE5100 Evaluation Board The capacitance (CBODY) of an approaching finger increases as it approaches the sense area. The IS31SE5100 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, 07/25/2013 1 IS31SE5100 8-CH Capacitive Touch Sensor Evaluation Board Guide ORDERING INFORMATION Part No. Temperature Range Package IS31SE5100-QFLS2-EB -40°C ~ +85°C (Industrial) QFN-24, Lead-free Table1: Ordering Information For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing team at analog@issi.com or (408) 969-6600. U2 3.0V 1 2 3 4 5 SCL SDA SDB PDA PCL GND RST PDA PCL 3.0V ICP 1 20 19 18 17 16 14 13 P0.0/CMP2/KBI0 P0.1/CIN2B/KBI1 P0.2/CIN2A/KBI2 P0.3/CIN1B/KBI3 P0.4/CIN1A/KBI4 P0.5/CMPREF/KBI5 P0.6/CMP1/KBI6 P0.7/T1/KBI7 VDD 15 U3 VCC C6 0.1uF VSS 1 5 10uF C1 3 C3 3 2 1 RXD TXD INTB RST 12 11 10 9 8 4 3 2 P1.0/TXD P1.1/RXD P1.2/T0/SCL P1.3/INT0/SDA P3.1/XTAL1 P1.4/INT1 P1.5/RST P3.0XTAL2/CLKOUT P1.6 P1.7 VDD VOUT 5 SD 0.1uF DC INPUT TXD RXD 3.0V VCC C5 10uF C4 2 GND BP 4 10nF 6 LDO 7 VCC LPC922 R4 R1 R3 R2 10K 10K 4.7K 4.7K U1 VCC VCC 2 KEY1 VCC SD INTB SDA SCL AD C2 0.1uF KEY2 1 19 KEY3 R5 510 KEY4 3 R6 510 4 R7 510 5 R8 510 6 R9 510 7 R10 510 8 R11 510 KEY5 KEY6 KEY7 KEY8 R12 C7 5pF C8 5pF C9 5pF C10 5pF C11 5pF C12 5pF C13 5pF 510 9 10 15 14 13 12 11 SDB INTB SDA SCL D8 D7 D6 D5 D4 D3 D2 D1 GND GND Cap1 OUT8 Cap2 OUT7 Cap3 OUT6 Cap4 OUT5 Cap5 OUT4 Cap6 OUT3 Cap7 OUT2 Cap8 OUT1 C14 5pF 24 R20 1K 23 R19 1K 22 R18 1K 21 R17 1K 20 R16 1K 18 R15 1K 17 R14 1K 16 R13 1K IS31SE5100 Figure 3: IS31SE5100 Application Schematic Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/25/2013 2 IS31SE5100 8-CH Capacitive Touch Sensor Evaluation Board Guide Bill of Materials Name Symbol Description Qty. Supplier Part No. Touch Sensor U1 Capacitive touch sensor 1 ISSI IS31SE5100 MCU U2 Microcontroller 1 NXP LPC922 LDO U3 Low-dropout regulator 1 PAM Diodes D1~D8 Diode,LED blue,SMD 8 Everlight PAM3101 19-217/BHC-ZL1M2 RY/3T Resistors R1,R4 RES,10k,1/16W,±5%,SMD 2 Resistors R2~R3 RES,4.7k,1/16W,±5%,SMD 2 Resistors R5~R12 RES,510,1/16W,±5%,SMD 8 Resistors R13~R20 RES,1k,1/16W,±5%,SMD 8 Capacitors C1,C5 CAP,10µF,16V,±20%,SMD 2 Capacitors C2,C3,C6 CAP, 0.1µF,16V,±20%,SMD 3 Capacitor C4 CAP,10nF,16V,±20%,SMD 1 Bill of Materials, refer to Figure 3 above. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/25/2013 3 IS31SE5100 8-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, 07/25/2013 4 IS31SE5100 8-CH Capacitive Touch Sensor Evaluation Board Guide Figure 6: Board Component Placement Guide -Bottom Layer Figure 7: Board PCB Layout-Bottom Layer Copyright © 2013 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, 07/25/2013 5