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IQS3161QNR Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
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IQS3161QNR Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers |
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5 / 28 page  IQ Switch ® ProxSense ® Series Copyright © Azoteq (Pty) Ltd 2015 IQS316 Datasheet Page 5 of 28 All rights reserved. Revision 1.03 November 2015 Table 2.1 QFN32 top view Pin Name Description 1 MOSI-I2CA0 Refer to Table 2.2 2 SOMI-SDA Refer to Table 2.2 3 RDY Refer to Table 2.2 4 SCK-SCL Refer to Table 2.2 5 /SS-IRDY Refer to Table 2.2 6 POUT Proximity output 7 SPI_ENABLE Comms Selection 8 /MCLR Master Clear 9 VDDHI Supply Voltage 10 RFIN RF Noise Input 11 VSS Ground Reference 12 ICTRL Current Reference 13 ZC ZC Input 14 SHLD_B Shield 15 SHLD_A Shield 16 VREG Internal Regulator Voltage 17 CxB0 Cx Sensor Line 18 CxB1 Cx Sensor Line 19 CxB2 Cx Sensor Line 20 CxB3 Cx Sensor Line 21 CxA0 Cx Sensor Line 22 CxA1 Cx Sensor Line 23 CxA2 Cx Sensor Line 24 CxA3 Cx Sensor Line 25 CxB4 / GPIO_0 Cx Sensor Line / I/O 26 CxB5/ GPIO_1 Cx Sensor Line / I/O 27 CxB6 / GPIO_4 Cx Sensor Line / I/O 28 CxB7 / GPIO_5 Cx Sensor Line / I/O 29 CxA4 / GPIO_2 Cx Sensor Line / I/O 30 CxA5 / GPIO_3 Cx Sensor Line / I/O 31 CxA6 / GPIO_6 Cx Sensor Line / I/O 32 CxA7 / GPIO_7 Cx Sensor Line / I/O In Table 2.2 a description of all communication pins are given. Table 2.2 Communication pins SPI I 2C Name Description Name Description MOSI Master Out Slave In I2CA0 Sub-Address 0 SOMI Slave Out Master In SDA Data /SS Slave Select IRDY I 2C Ready SCK Serial Clock SCL Clock RDY SPI Ready Not used Pins are used as defined in the standard communications protocols, except for the additional RDY pin in SPI mode and the IRDY pin in I 2C mode. The ready is an indication to the master that data transfer is ready to be initiated (that the communication window is available). 2.2 ICTRL A reference resistor of 39k MUST be placed from the ICTRL I/O to ground, as shown in Figure 1.1. It is very important that the track to the resistor must be as short as possible, with the other side having a good connection to ground. 3 ProxSense ® Module The device contains a ProxSense ® module that uses patented technology to provide detection of PROX/TOUCH on the numerous sensing lines. The ProxSense ™ module is a combination of hardware and software, based on the principles of charge transfer. A set of measurements are taken and used for calculating the touch controller outputs. 3.1 Charge Transfer Concepts Capacitance measurements are taken with a charge transfer process that is periodically initiated. The measuring process is referred to as a charge transfer cycle and consists of the following: |
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