Tiny Tapeout > Tiny Tapeout Chips > Tiny Tapeout IHP 26b > 226 OMEGA INFINITY KAORU 3D Metal Grid Processor
226 OMEGA INFINITY KAORU 3D Metal Grid Processor
226 : OMEGA INFINITY KAORU 3D Metal Grid Processor
- Author: Kaoru Aguilera Katayama
- Description: Physical BEOL 3D metal wire grid mesh coupled to a CMOS Circuit-SAT engine
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- Clock: 10000000 Hz
OMEGA INFINITY KAORU 3D Metal Grid Processor
How it works
This processor interfaces an integrated 3D BEOL physical wire mesh (omega_metal_grid_3d.gds) fabricated in the SkyWater 130nm metallization stack (met1 through met5) directly with standard-cell CMOS threshold inverters.
The metal mesh provides continuous analog potential relaxation across physical conductors. The state of these physical wires is quantized into digital logic levels that feed a runtime-programmable Boolean circuit DAG (Directed Acyclic Graph) to evaluate Circuit-SAT formulations directly in hardware.
How to test
- Hold
rst_nlow for 4 clock cycles, then bring high. - Enable programming mode by asserting
uio_in[0] = 1. - Stream gate operations by providing
prog_oponui[2:0],prog_aonui[7:3],prog_bonuio[7:4], and togglinguio[1](prog_we). - Select the target evaluation node by driving
prog_awithuio[1] = 0. - Switch to execution mode (
uio_in[0] = 0) and assertuio[3] = 1(grid_stable). - Read
uo_out[0]for SAT,uo_out[1]for UNSAT, anduo_out[7:3]for the evaluated physical tap states.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | prog_op[0] | SAT | prog_en (1=prog, 0=run) |
| 1 | prog_op[1] | UNSAT | prog_we (write strobe) |
| 2 | prog_op[2] | DONE | unused |
| 3 | prog_a[0] | tap_out[0] | grid_stable (relaxation trigger) |
| 4 | prog_a[1] | tap_out[1] | prog_b[0] |
| 5 | prog_a[2] | tap_out[2] | prog_b[1] |
| 6 | prog_a[3] | tap_out[3] | prog_b[2] |
| 7 | prog_a[4] | tap_out[4] | prog_b[3] |