QLF08_LaBel.pdf - 第27页
IC and Component Selection for Space Sy stems – Presented by Kenneth A . LaBel 27 The T rade Space Curve for Performance • Application-specific trade-offs are often made based on the design complexity of the application …
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
26
Sample System Implementation for
the Three Styles of FPGAs
Non-volatile memory (NVM) –
holds configuration of FPGA
FPGA
FPGA
FPGA
One-time
Programmable
(OTP)
Non-volatile
Reprogrammable (Flash)
Circuits to interface
between FPGA and
ground for new
configuration uploads
Watchdog/
controller
SRAM-based
Circuits to interface
between FPGA and
ground for new
configuration uploads
Radiation tolerant/hardened options available in all types;
Some are “harder” than others
Increasing
System
Complexity
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
27
The Trade Space Curve for Performance
• Application-specific trade-offs are often made based on the
design complexity of the application requirements.
– Note: FPGAs and SAs are moving to the right as
semiconductor processes scale to smaller transistor feature
sizes
Source: http://www.fpgajournal.com
Majority of NASA needs
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
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Programmatics:
Development Schedule
• Example of a time to market (TTM) for commercial options
– Assumptions
• 90nm technology, < 1Mgate device
– SA is ~1/2 TTM of a CA
– FPGAs are likely < ½ of the SA TTM
– Note: This does not consider reliability or radiation qualification
times
0 4 8 12162024283236
Std. Cell
S-ASIC
Months
Time to 1st Silicon
Respin (Risk X Time)
Time to 2nd Device
Respin 2nd Device
SA
CA
Comparing
SA vs. CA
for TTM
Source: www.chipdesignmag.com