3D Programmable Architecture
Tabula’s Spacetime™ technology enables a new category of programmable logic device - 3PLD - that is freed from the limitations of FPGA’s 2D topologies by using time as a third dimension to create a 3D device.

This is made possible by a Spacetime hardware capable of dynamically reconfiguring at multi-GHz rates and by the Stylus compiler that transparently manages this ultra-rapid reconfiguration of logic, memory, and interconnect resources throughout the chip. As a result, Spacetime creates a third dimension of Space by using Time.

A Spacetime device reconfigures on the fly at multi-GHz rates executing each portion of a design in an automatically defined sequence of steps. Manufactured using a standard CMOS process, Spacetime uses this ultra-rapid reconfiguration to make Time a third dimension. This results in a 3D device with multiple layers or “folds” in which computation and signal transmission can occur. Each fold performs a portion of the desired function and stores the result in place. When some or all of a fold is reconfigured, it uses the locally stored data to perform the next portion of the function. By rapidly reconfiguring to execute different portions of each function, a 3D Spacetime device can implement a complex design using only a small fraction of the resources that would be required by an FPGA, with its inherently 2D architecture.

This ultra-rapid reconfiguration enables Spacetime to deliver a breakthrough in programmable logic price/performance and capabilities. As a result, Spacetime products combine the flexibility and rapid time-to-market of an FPGA with ASIC capacity, at price points suitable for volume production.
"For decades, the Holy Grail for electronic system manufacturers has been a logic platform that combines programmability and flexibility with large capacity and cost effectiveness. Semico believes that the unique approach to how Tabula accomplishes this through their Spacetime architecture is truly innovative and is something the entire semiconductor industry should take note of.” said Rich Wawrzyniak, Sr. Market Analyst, ASIC & SoC at Semico Research Corp.
This one could be game-changing: “Tabula's main innovation is to exploit brilliantly a growing imbalance in conventional FPGA implementation. The architecture has several important implications. first, it packs about 3x more logic into a given area than a conventional FPGA. Second, Tabula can emulate eight-port embedded RAM blocks by time-multiplexing the inputs and outputs of a single-port physical RAM, so the company can implement memory that is physically faster, denser, and lower in both static and dynamic power than the true eight-port blocks on a conventional high-end FPGA." By Ron Wilson, Editor in Chief EDN Magazine
"Tabula's Spacetime technology is a real innovation, not just hype. By rapidly reconfiguring their programmable-logic fabric -- up to 1.6 billion times per second -- Tabula's chips can use the same logic gates and wires over and over again for different purposes. To developers, the fabric looks much larger than it really is, without paying for additional silicon and power. Tabula's 3PLDs have only one die, but they emulate a three-dimensional PLD that stacks multiple chips in a single package." By Tom Halfhill, Senior Analyst at In-Stat / Microprocessor Report
“Tabula's architecture gives something like a 2-process-node advantage over normal FPGAs. Overall, the new architecture is exciting and promising. Tabula is attacking the communications infrastructure market - which is the cash cow of the entrenched FPGA superpowers." By Kevin Morris, Editor in Chief, FPGA Journal
“Tabula’s architecture is a novel attempt to solve the interconnect bottleneck in FPGAs. Tabula’s ability, as a startup, to design chips in TSMC’s new 40 nm process speaks to its industry connections. Tabula is initially aiming its chips at network, and telecom infrastructure markets–all sweet spots for programmable logic characterized by a need for programmability." By Jeff Bier, BDTi
3-D architecture promises new type of PLD “Tabula is offering a radically different technology—but the dramatic differences in the architecture are transparent to the user. The user experience of Tabula's development tools is also consistent with what designers have grown used to." By Dylan McGrath, Editor EETimes