EP2S180F1020C4 Datasheet, PDF (373/768 Pages) Altera Corporation – Stratix II Device Handbook, Volume 1

TriMatrix Embedded Memory Blocks in Stratix II and Stratix II GX Devices
TriMatrix memory supports mixed-width configurations, allowing
different read and write port widths. Tables 2–9 through 2–11 show the
mixed width configurations for the M512, M4K, and M-RAM blocks,
respectively.
Table 2–9. Stratix II and Stratix II GX M512 Block Mixed-Width
Configurations (Simple Dual-Port Mode)
Write Port
Read Port
512 × 1 256 × 2 128 × 4 64 × 8 32 × 16 64 × 9 32 × 18
512 × 1
v
v
v
v
v
256 × 2
v
v
v
v
v
128 × 4
v
v
v
v
v
64 × 8
v
v
v
v
v
32 × 16
v
v
v
v
v
64 × 9
v
v
32 × 18
v
v
Table 2–10. Stratix II and Stratix II GX M4K Block Mixed-Width Configurations (Simple Dual-Port Mode)
Read Port
4K × 1
2K × 2
1K × 4
512 × 8
256 × 16
128 × 32
512 × 9
256 × 18
128 × 36
4K × 1
v
v
v
v
v
v
2K × 2
v
v
v
v
v
v
1K × 4
v
v
v
v
v
v
Write Port
512 × 8 256 × 16 128 × 32 512 × 9 256 × 18 128 × 36
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
Altera Corporation
January 2008
2–13
Stratix II Device Handbook, Volume 2