This Programming interface circuit sends the programming signals from the USB cable to the FPGA chip directly, through a standardized 10-PIN interface. Technically there are only 4 or 5 signal pins used, excluding GND and unused interface pins from the 10-PIN Ribbon cable that is commonly used by JTAG controllers. Almost all FPGA and
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CPLD components have a set of devoted pins on the chip for this JTAG "In-System-Programming" interface. Here below is an older Altera MAX7000S CPLD chip which supports this JTAG interface used for special applications including a feature called "ISP" or In-System-Programming. I have highlighted the JTAG interface pins in Yellow for your convenience. So all that is needed in order to program this chip, is to connect these JTAG pins from the chip to a USB-Blaster circuit. You then also connect all of the chips VCC and GND pins to source power and. The USB-Blaster or "JTAG" programming circuit is also available as an external JTAG controller called the "ALTERA USB-Blaster" as seen in the images below. There was an older version of this JTAG controller called the Altera "BYTE-BLASTER-II" and it connected to your PC`s 25pin Parallel printer port. Having this "USB-BLASTER" JTAG controller gives you the option to program other CPLD`s and FPGA`s that provide the JTAG interface and support the "ISP" (In-Service-Programming) feature. In turn, you can build your own PCB`s and program an Altera CPLD or FPGA device with your own logic design. The chip is programmed the same way you program your Altera development board through Quartus or your logic Synthesis software of choice. Many of the older Altera CPLD chips require a special Master Programming unit, in order to be programmed and do not support the JTAG interface at all. The...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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