UMC90 Standard Cells Library for AMCHIP04

1. Amchip04 with umc90 std cells • UMC90 FSD0A_A standard cells library • Our custom standard cells: • single_layer • search_line • Tools used • Synopsis DC D-2010.03-SP1-1 (synthesis) • Cadence SoC Encounter v07.10-s219_1 (placement, routing) • Synopsis PT D-2010.03-SP1-1 (timing analysis) • Custom scripts (manual place)

2. Basic bank structure 8x Input Bus Buffer 32x Patterns (row) 32x Majority Matched patterns . . . . . . . . . Buffer 32x Patterns (row) 32x Majority - Manual placement - Majority row has it's own clock tree

3. Basic bank structure 8x Input Bus A pattern is a row: 8x single_layer cells Each cell match a 15bit bus Buffer 32x Patterns (row) 32x Majority Matched patterns . . . . . . . . . Buffer 32x Patterns (row) 32x Majority - Manual placement - Majority row has it's own clock tree

4. Basic bank structure 8x Input Bus Majority logic: If X out of 8 bus match the pattern is matched. X is programmable via JTAG Buffer 32x Patterns (row) 32x Majority Matched patterns . . . . . . . . . Buffer 32x Patterns (row) 32x Majority - Manual placement - Majority row has it's own clock tree

5. CLK BL [15:4] BL_N [15:4] XXXXXX XXXXXXXX DATA ZZZZZZ slpre slpre_t Mlpre_n BL [3:0] BL_N [3:0] XXXXXX XXXXXXXX DATA Match Line MLSA_res SEN Match_reg

6. CLK All this signals are inputs to the single_layer pattern cell for activate the match. Relative timing is critical! Generated in each Buff module By global “read” signals BL [15:4] BL_N [15:4] XXXXXX XXXXXXXX DATA ZZZZZZ slpre slpre_t Mlpre_n BL [3:0] BL_N [3:0] XXXXXX XXXXXXXX DATA Match Line MLSA_res SEN Match_reg

7. 512 patterns bank 16 x 32 pattern blocks are manually placed to build a 512 patterns bank. Horizontal and vertical gaps are left for power grid.

8. All logic placed The pattern bank occupies most of the area. All the other control logic scale very weakly with the number of patterns. We could try to fill the chip with a bigger column of patterns (~800), but is not critical for this mini@sic prototype to have a bigger bank.

9. Logic scheme

10. Power grid Power distribution is done by two big horizontal stripes and two thinner vertical stripes. We are waiting a feedback from IMEC about this power grid design.

11. 512 patt AMCHIP04 routed First results of routing (wroute, clock tree routed first, no post-routing optimization) are reasonable: - routing is simple and consistent with our plans in the bank area (vertical buses, horizontal output) - no critical congestions in other areas

12. Timing Analysis • We have working skeleton scripts for static timing analysis • A first look at the timing with PrimeTime showed some various setup and hold violations • No post-route optimization was done, buffer optimization in this step might remove most of the violations • Global signals running through all the patterns coloumn have setup violation • Force a better routing of the column area • Manually optimize buffer usage • Split the column in two shorted columns • Some optimization and re-routing is needed, but no critical flaws are detected