We present a novel programming circuit used in our radiation-hardened field programmable gate array （FPGA） chip.This circuit provides the ability to write user-defined configuration data into an FPGA and then read i...We present a novel programming circuit used in our radiation-hardened field programmable gate array （FPGA） chip.This circuit provides the ability to write user-defined configuration data into an FPGA and then read it back.The proposed circuit adopts the direct-access programming point scheme instead of the typical long token shift register chain.It not only saves area but also provides more flexible configuration operations.By configuring the proposed partial configuration control register,our smallest configuration section can be conveniently configured as a single data and a flexible partial configuration can be easily implemented.The hierarchical simulation scheme, optimization of the critical path and the elaborate layout plan make this circuit work well.Also,the radiation hardened by design programming point is introduced.This circuit has been implemented in a static random access memory（SRAM）-based FPGA fabricated by a 0.5μm partial-depletion silicon-on-insulator CMOS process.The function test results of the fabricated chip indicate that this programming circuit successfully realizes the desired functions in the configuration and read-back.Moreover,the radiation test results indicate that the programming circuit has total dose tolerance of 1×10~5 rad（Si）,dose rate survivability of 1.5×10^（11） rad（Si）/s and neutron fluence immunity of 1×10^（14） n/cm^2.展开更多
A radiation-hardened SRAM-based field programmable gate array VS1000 is designed and fabricated with a 0.5μm partial-depletion silicon-on-insulator logic process at the CETC 58th Institute.The new logic cell （LC）,w...A radiation-hardened SRAM-based field programmable gate array VS1000 is designed and fabricated with a 0.5μm partial-depletion silicon-on-insulator logic process at the CETC 58th Institute.The new logic cell （LC）,with a multi-mode based on 3-input look-up-table（LUT）,increases logic density about 12%compared to a traditional 4-input LUT.The logic block（LB）,consisting of 2 LCs,can be used in two functional modes：LUT mode and distributed read access memory mode.The hierarchical routing channel block and switch block can significantly improve the flexibility and routability of the routing resource.The VS1000 uses a CQFP208 package and contains 392 reconfigurable LCs,112 reconfigurable user I/Os and IEEE 1149.1 compatible with boundary-scan logic for testing and programming.The function test results indicate that the hardware and software cooperate successfully and the VS1000 works correctly.Moreover,the radiation test results indicate that the VS1000 chip has total dose tolerance of 100 krad（Si）,a dose rate survivability of 1.5×10^（11）rad（Si）/s and a neutron fluence immunity of 1×10^（14） n/cm^2.展开更多
文摘We present a novel programming circuit used in our radiation-hardened field programmable gate array （FPGA） chip.This circuit provides the ability to write user-defined configuration data into an FPGA and then read it back.The proposed circuit adopts the direct-access programming point scheme instead of the typical long token shift register chain.It not only saves area but also provides more flexible configuration operations.By configuring the proposed partial configuration control register,our smallest configuration section can be conveniently configured as a single data and a flexible partial configuration can be easily implemented.The hierarchical simulation scheme, optimization of the critical path and the elaborate layout plan make this circuit work well.Also,the radiation hardened by design programming point is introduced.This circuit has been implemented in a static random access memory（SRAM）-based FPGA fabricated by a 0.5μm partial-depletion silicon-on-insulator CMOS process.The function test results of the fabricated chip indicate that this programming circuit successfully realizes the desired functions in the configuration and read-back.Moreover,the radiation test results indicate that the programming circuit has total dose tolerance of 1×10~5 rad（Si）,dose rate survivability of 1.5×10^（11） rad（Si）/s and neutron fluence immunity of 1×10^（14） n/cm^2.
文摘A radiation-hardened SRAM-based field programmable gate array VS1000 is designed and fabricated with a 0.5μm partial-depletion silicon-on-insulator logic process at the CETC 58th Institute.The new logic cell （LC）,with a multi-mode based on 3-input look-up-table（LUT）,increases logic density about 12%compared to a traditional 4-input LUT.The logic block（LB）,consisting of 2 LCs,can be used in two functional modes：LUT mode and distributed read access memory mode.The hierarchical routing channel block and switch block can significantly improve the flexibility and routability of the routing resource.The VS1000 uses a CQFP208 package and contains 392 reconfigurable LCs,112 reconfigurable user I/Os and IEEE 1149.1 compatible with boundary-scan logic for testing and programming.The function test results indicate that the hardware and software cooperate successfully and the VS1000 works correctly.Moreover,the radiation test results indicate that the VS1000 chip has total dose tolerance of 100 krad（Si）,a dose rate survivability of 1.5×10^（11）rad（Si）/s and a neutron fluence immunity of 1×10^（14） n/cm^2.
