What is claimed is:
Persons write a program for an anti-tie down circuit city ordinary skill in the art will understand that FIG. As can be seen from an examination of FIG.
Both the horizontal and vertical interconnect conductors may be segmented to allow versatility in forming interconnect between inputs and outputs of the various circuit elements disposed in system-on-a-chip integrated circuit 10 of FIG.
As is known in the art, the various interconnect conductors may be of varying lengths or may be segmented into varying lengths. In addition, either flat or hierarchical interconnect systems may be employed.
Intersections formed by individual ones of the horizontal and vertical interconnect conductors may also be populated by user-programmable interconnect elements.
The user-programmable interconnect elements may be in the form of one-time programmable antifuse elements as are known in the art, or may be in the form of reprogrammable switches as are also known in the art.
The latter reprogrammable interconnect switches may employ technologies such as flash memory, SRAM, and other known interconnect switch technologies. As shown in FIG. Persons of ordinary skill in the art will recognize that the horizontal interconnect conductors and the vertical interconnect conductors are disposed in different metal interconnect layers of the system-on-a-chip integrated circuit.
An exemplary individual horizontal interconnect conductor is shown to be comprised of segments 34 a, 34 b, 34 c, and 34 d, each adjoining segment being coupled to one another by user-programmable interconnect elements 36, 38, and 40, as shown in FIG. Similarly, an exemplary individual vertical interconnect conductor is shown to be comprised of segments 42 a, 42 b, 42 c, and 42 d, each adjoining segment being coupled to one another by user-programmable interconnect elements 44, 46, and 48, as also shown in FIG.
Horizontal interconnect conductor segment 34 d is shown intersecting vertical interconnect conductor segment 42 b. The intersection of these two interconnect conductor segments is populated with a user-programmable interconnect element By programming appropriate ones of the user-programmable interconnect elements, a conductive path may be formed between the output of one of the circuit elements on the system-on-a-chip integrated circuit and the input of another one of the circuit elements on the system-on-a-chip integrated circuit to form a connection therebetween.
Persons of ordinary skill in the art will appreciate that the illustrative interconnect architecture depicted in FIG. System-on-a-chip integrated circuit 60 also includes a volatile memory block 78 e. As in the embodiment illustrated in FIG.
As in the embodiments shown in FIGS. The system-on-a-chip integrated circuit 80 of FIG. In the embodiment of FIG.
An example of such an embodiment may include a microprocessor such as an hardwired core a popular 's 8-bit microprocessor with a bit address space with 64 K-bytes of SRAM and 64 K-bytes of flash memory.
According to one aspect of the present invention, it will be advantageous to configure the SRAM block 98 and flash memory block 84 into separate small blocks e. In such an embodiment, memory blocks that are not used by the processor could be allocated for use by the FPGA block 82 of the circuit.
An FPGA or other programmable logic device, including a microprocessor soft or hard requires memory for program store. Because program-store memory never changes, an on-board PROM program-store block is useful for this task.
There are well known methods for a processor to download blocks of memory to the cache as they are needed. SRAM-based FPGA is typically configured by a bit-stream that is stored in non-volatile memory, by integrating a microcontroller and flash FPGA in one chip, The microcontroller can take the control of FPGA re-configuration for certain applications during boot-up or on-the-fly system operation.
On the other hand, the configuration procedure can be reversed to let the FPGA set up the microcontroller, for example, if the system times out or hangs during operation, the FPGA can send a soft reset to the microcontroller instead of requiring a hard reset.
Customized instructions can be implemented in flash memory, or FPGA blocks can be reconfigured as a co-processor either through the on-chip microcontroller or external host to build a powerful flash-based FPGA on-chip processor platform.
One particular embodiment of the invention may be configured using a highly successful flash FPGA architecture as the programmable logic block 12 of FIG. By combining an advanced flash FPGA core with embedded flash memory blocks or analog peripherals, system-on-a-chip devices according to the present invention dramatically simplify system design, and as a result, save both board space and overall system cost.
The state-of-the-art flash memory technology offers very high-density integrated flash arrays and therefore a substantial cost saving over use of external flash chips to configure SRAM-based FPGAs, the traditional alternative.
The multiple analog circuit blocks extend the traditional FPGA application from the purely digital domain to mixed-signal applications. The embedded flash memory and integrated analog circuit blocks can be used with an integrated soft i.
Such an embodiment of the present invention is illustrated in the block diagram of FIG. SOC includes a field-programmable gate array FPGA that includes an FPGA core comprising logic tiles, routing, and flash-cell switches and programming structures and techniques as is known in the art.Also, to optimally use duty cycling for power saving, fast start-up and shut-down circuit techniques are needed.
System simulations, analog/mixed signal circuit design, IC design and measurements of next generation cellular IoT transceivers are the main parts of the PhD work.
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1 Channel 5V Relay Module has triode drive which increases relay coil and high impedance controller pins. The module’s pull down circuit avoids malfunction and there are power supply and control indicator LEDs on the board.
Aug 21, · The write assist circuit of claim 2, wherein the adjustable voltage divider comprises a pull-up circuit and a pull-down circuit, the pull-up circuit and the pull-down circuit are coupled to the output of the bias voltage circuit, and at least one of the pull-up circuit or the pull-down circuit has an adjustable resistance.