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ICsprout55 out_proj thirty-two-row
ROM scaling on the out_proj tensor chain: same MAC pattern as CF-6, twice the pinned rows, honest 70 MHz placement-RC timing.
Key points
Tensor
out_proj L0
Top-32 ranked rows; first 16 match CF-6.
Row width
2048 INT4
128 cycles × 16 lanes per dot product.
Cells
~31k mapped
80,269 instances after tap/CTS/fill.
DRT
0 violations
500×500 µm die.
Timing (exp.)
70 MHz
Matches CF-4 closing on larger ROM.
CF-8 shows the out_proj primitive chain scales to thirty-two rows without changing the MAC datapath — only the row mux and ROM depth grow.
Still thirty-two rows of one projection tensor — not full out_proj (1024 rows) on chip.