Speaker
Dr
Rajan Bedi
(Spacechips Ltd)
Description
We compare IP implementation and share design-in experiences of six 65 nm ultra deep-submicron, space-grade and COTS FPGAs: RTG4, V5QV, NG-MEDIUM, NG-LARGE, IGLOO2 and SmartFusion2.
Two versions of the RTG4 flash FPGA containing the same rad-hard die are available to the space industry: a 1657 CCGA/CLGA device and a 352-pin CQFP part with less (166 vs. 720) I/O and fewer (4 vs. 24) high-speed serial links. Both contain 151,825 logic elements containing a TMR flip-flop and an SET filter, and their memory supports SECDED EDAC with logically-adjacent storage bits interleaved in the physical layout to protect against multiple-bit upsets.
Simulations have shown that the power consumption of both RTG4 parts is almost identical as I/O dissipation is negligible and its overall proportion decreases as a function of logic utilisation. Flash FPGAs are non-volatile, do not require external boot memory and their configuration is immune to radiation effects.
The V5QV, NG-MEDIUM and NG-LARGE are rad-hard SRAM-based FPGAs containing 131k, 35k and 140k LUTs respectively. Each contain twelve-transistor configuration memory cells to protect your intended functionality against radiation effects as well as other circuit, architectural and layout-level hardening to improve overall reliability.
IGLOO2 and SmartFusion2 are 65 nm, flash-based COTS FPGAs whose configuration is immune to radiation effects and contain some hardened fabric logic.
NG-MEDIUM and NG-LARGE are new, European, ITAR/EAR-free, rad-hard FPGAs offering on-board processing opportunities for markets with export concerns.
Our design-in and comparison of 65nm FPGAs reveals insightful discoveries to help traditional and NewSpace companies design right-first-time, digital, space sub-systems.
Primary author
Dr
Rajan Bedi
(Spacechips Ltd)
