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In this lecture, we are looking at the basic output elements and their configurations on the Basys 3 board.
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board.
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Probably the simplest way to show digital signals is using LEDs. The Basys 3 board contains 16 individual 
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user LEDs connected to FPGA pins through a set of resistors. 
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Any logical value generated inside the FPGA can be represented on these LEDs following simple design methodologies. 
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Basys 3 board has an Artix 7 (XC7A35T) FPGA with CPG236 packaging code and based on the pin 
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configuration shown in this figure; it has 238 pins under the chip. 
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Each pin has a name that is the concatenation of a letter and a number which defines its position in a 2D 
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coordinate system.
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For example, the name of this pin is U16.
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This figure shows the connections between the FPGA and the components on the Basys 3 board. It can 
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be found on the Board Reference Manual available on the manufacturer website. To connect to the website, 
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use the QR code on this slide.
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This picture shows the pin-name on the FPGA connected to LEDs. 
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Our design in the FPGA should drive these pins with proper data to turn on/off the corresponding LEDs.
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As can be seen, 
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LEDs are connected together in a common cathode configuration, and their anodes are derived by FPGA via 330-ohm 
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resistors, 
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so for turning on an LED a logic high voltage (or logic value 1) should be applied to the corresponding 
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FPGA pin.
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In the next lecture, I will explain the basic concepts behind the LED controller design in HLS and I will clarify
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that this design consists of two parts a functional block described in C C++ and the connections between
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this block and the FPGAs pins.
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Takeaway points from this lecture are: The name of FPGA I/O pins connected to the LEDs that
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we will use later. To turn on an LED, 
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we apply the logic value 1 to the corresponding FPGA pin. 
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This is the quiz for this lecture
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Find the pin location of the seventh LED on the Basys3 board that is denoted by LD06 in the following 
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picture.