{"title":"Princeton Technology Corp. Device Support: Development Boards \u0026 Tools","description":"\u003cp\u003e\u003cspan\u003ePrinceton Technology Corp. specializes in audio and voice processing ICs, offering innovative solutions for consumer electronics, automotive, and industrial applications.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"mikroe-3358-evc-click-board-uk","title":"EVC Click Board™","description":"\u003cp\u003eEquipped with six digitally controlled attenuators, featuring high channel separation, extremely low noise, great SNR ratio of more than 100dB, and low count of required external components.\u003c\/p\u003e\n\n\u003ch3\u003eHow Does The EVC Click Board™ Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe main component of the \u003cem\u003e\u003cstrong\u003eEVC Click Board™\u003c\/strong\u003e\u003c\/em\u003e is the PT2258, a six-channel electronic volume controller IC, by Princeton Technology Corp. This IC contains six digitally controlled audio attenuators, which can attenuate signals between 0dB and -79dB. Each channel can be individually controlled by two-byte commands, sent over the I2C interface.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"MikroE Audio and Voice EVC Click\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/www.mikroe.com\/img\/images\/evc-click-inner-img.jpg\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eAlthough digitally controlled, sound signals within the PT2258 remain in the analog domain. The PT2258 offers a very clear and undistorted sound. The Signal to Noise Ratio (SNR) of the PT2258 is specified to be 105dB (1V RMS at any input), while the Total Harmonic Distortion (THD) is only 0.005% (200mV RMS at any input). THD gets worse as the input signal rises: 2.8V RMS results in THD of 1%. The maximum input signal should stay below 2.8V, else too much audible distortion may appear at the output.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eEVC Click Board™\u003c\/strong\u003e is equipped with two rows of standard 2.54mm (100 mil) headers. There are six pins at each row, allowing the inputs and the outputs to be easily interfaced with the existing multichannel equipment. This Click board™ should be connected on the signal path, either in front of the amplifier itself, or in front or behind other sound processing equipment (e.g. equalizer, delay, room correction…). That way, an optimal audio signal level will be ensured for the Click board™.\u003c\/p\u003e\n\n\u003cp\u003eEach input\/output pair runs through an internal attenuator, which provides up to -79dB of attenuation, in 1dB steps. Although it seems like a very high attenuation, using it with amplifiers with high gain values may lead to still hear the sound, even after the full attenuation. Therefore, the PT2258 features a MUTE function, that completely cuts the audio output.\u003c\/p\u003e\n\n\u003cp\u003eTo set attenuation of a certain level, two bytes must be consequently sent over the I2C interface. There are both -1dB step commands and -10dB step commands for each channel. To achieve the desired attenuation at the specific channel, two commands should be sent consequently: one for -10 dB attenuation, and one for -1 dB attenuation. These commands can be sent in any order. However, sending a single command or adding a MUTE command between two attenuation commands may lead to unpredictable results. This Click board™ is supported by a mikroSDK compliant library of functions, which greatly accelerate software development, by simplifying the software development.\u003c\/p\u003e\n\n\u003cp\u003eThe I2C slave address of the \u003cstrong\u003eEVC Click Board™\u003c\/strong\u003e can be set using two SMD jumpers, grouped under the I2C ADD label. First SMD jumper is labelled as C1, while the second jumper is labelled as C2. These jumpers are used to configure bits CODE1 and CODE2, allowing several different I2C addresses to be selected. These jumpers can be independently moved to either position, allowing to select the desired slave address. Please refer to the PT2258 datasheet for more information about configuring the I2C slave address.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eEVC Click Board™\u003c\/strong\u003e uses the I2C interface for the communication. It can be interfaced with both 3.3V and 5V microcontrollers (MCUs) by simply switching the SMD jumper labelled as VCC COMM to a desired position. However, thePT2258 itself still requires 5V for its operation, since it requires a power supply voltage between 5V and 9V.\u003c\/p\u003e\n\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eType\u003c\/td\u003e\n            \u003ctd\u003eAmplifier\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eApplications\u003c\/td\u003e\n            \u003ctd\u003eThe \u003cstrong\u003eEVC Click Board™\u003c\/strong\u003e is perfectly suited to be used for all kinds of audio processing equipment, audio distributing systems, multichannel and surround systems, car audio systems, and similar applications that require digital multichannel sound level control.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOn-board modules\u003c\/td\u003e\n            \u003ctd\u003ePT2258, a six-channel electronic volume controller IC, by Princeton Technology Corp.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eKey Features\u003c\/td\u003e\n            \u003ctd\u003eSix high-quality digitally controlled audio attenuators, attenuation range from 0dB to -79dB, very high Signal to Noise Ratio (SNR) of 105 dB typically, very low Total Harmonic Distortion (THD) of 0.005% for 200mV RMS, etc.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInterface\u003c\/td\u003e\n            \u003ctd\u003eI2C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eCompatibility\u003c\/td\u003e\n            \u003ctd\u003emikroBUS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eClick board size\u003c\/td\u003e\n            \u003ctd\u003eM (42.9 x 25.4 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInput Voltage\u003c\/td\u003e\n            \u003ctd\u003e3.3V or 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePINOUT DIAGRAM\u003c\/h3\u003e\n\n\u003cp\u003eThis table shows how the pinout of the \u003cstrong\u003eEVC Click Board™\u003c\/strong\u003e corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).\u003c\/p\u003e\n\n\u003ctable width=\"549\"\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth colspan=\"4\"\u003e\u003cimg alt=\"Mikrobus logo.png\" data-entity-type=\"\" data-entity-uuid=\"\" src=\"https:\/\/cdn.mikroe.com\/img\/mikrobus\/mikroBUS-logo-black.png\"\u003e\u003c\/th\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eAN\u003c\/td\u003e\n            \u003ctd\u003ePWM\u003c\/td\u003e\n            \u003ctd\u003e16\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eRST\u003c\/td\u003e\n            \u003ctd\u003eINT\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eCS\u003c\/td\u003e\n            \u003ctd\u003eRX\u003c\/td\u003e\n            \u003ctd\u003e14\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eSCK\u003c\/td\u003e\n            \u003ctd\u003eTX\u003c\/td\u003e\n            \u003ctd\u003e13\u003c\/td\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003eMISO\u003c\/td\u003e\n            \u003ctd\u003eSCL\u003c\/td\u003e\n            \u003ctd\u003e12\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSCL\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Clock\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eNC\u003c\/td\u003e\n            \u003ctd\u003e6\u003c\/td\u003e\n            \u003ctd\u003eMOSI\u003c\/td\u003e\n            \u003ctd\u003eSDA\u003c\/td\u003e\n            \u003ctd\u003e11\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eSDA\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eI2C Data\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e7\u003c\/td\u003e\n            \u003ctd\u003e3.3V\u003c\/td\u003e\n            \u003ctd\u003e5V\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e5V\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePower Supply\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e8\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n            \u003ctd\u003e9\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGround\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eONBOARD SETTINGS AND INDICATORS\u003c\/h3\u003e\n\n\u003ctable\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003cth\u003eLabel\u003c\/th\u003e\n            \u003cth\u003eName\u003c\/th\u003e\n            \u003cth\u003eDefault\u003c\/th\u003e\n            \u003cth\u003eDescription\u003c\/th\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003ePWR\u003c\/td\u003e\n            \u003ctd\u003e-\u003c\/td\u003e\n            \u003ctd\u003ePower LED indicator\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP1\u003c\/td\u003e\n            \u003ctd\u003eVCC COM\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eLogic voltage level selection: left position 3.3V, right position 5V\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP2\u003c\/td\u003e\n            \u003ctd\u003eI2C ADD (C1)\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eI2C Slave Address Selection: left position CODE 1 bit = 1, right position CODE 1 bit = 0\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eJP3\u003c\/td\u003e\n            \u003ctd\u003eI2C ADD (C2)\u003c\/td\u003e\n            \u003ctd\u003eLeft\u003c\/td\u003e\n            \u003ctd\u003eI2C Slave Address Selection: left position CODE 2 bit = 1, right position CODE 2 bit = 0\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Mikroelektronika d.o.o.","offers":[{"title":"Default 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