EP4SE360F35I4 Datasheet, PDF (68/432 Pages) Altera Corporation – This section provides a complete overview of all features relating to the Stratix IV device family, which is the most architecturlly advanced

3–12
Chapter 3: TriMatrix Embedded Memory Blocks in Stratix IV Devices
Memory Modes
Table 3–5. M9K Block Mixed-Width Configurations (Simple Dual-Port Mode) (Part 2 of 2)
Read Port
Write Port
8K × 1 4K × 2 2K × 4 1K × 8 512 × 16 256 × 32 1K × 9
1K × 8
512 × 16
256 × 32
1K × 9
512 × 18
256 × 36
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Y
—
Y
—
Y
—
—
Y
—
Y
—
Y
512 × 18
—
—
—
Y
Y
Y
256 × 36
—
—
—
Y
Y
Y
Table 3–6 lists the mixed-width configurations for M144K blocks in simple dual-port
mode.
Table 3–6. M144K Block Mixed-Width Configurations (Simple Dual-Port Mode)
Read Port
16K × 8
8K × 16
4K × 32
Write Port
2K × 64 16K × 9
16K × 8
8K × 16
4K × 32
2K × 64
16K × 9
8K × 18
4K × 36
2K × 72
Y
Y
Y
Y
—
Y
Y
Y
Y
—
Y
Y
Y
Y
—
Y
Y
Y
Y
—
—
—
—
—
Y
—
—
—
—
Y
—
—
—
—
Y
—
—
—
—
Y
8K × 18
—
—
—
—
Y
Y
Y
Y
4K × 36
—
—
—
—
Y
Y
Y
Y
2K × 72
—
—
—
—
Y
Y
Y
Y
In simple dual-port mode, M9K and M144K blocks support separate write-enable and
read-enable signals. You can save power by keeping the read-enable signal low
(inactive) when not reading. Read-during-write operations to the same address can
either output a “don’t care” value or “old data” value. To choose the desired behavior,
set the read-during-write behavior to either don’t care or old data in the RAM
MegaWizard Plug-In Manager in the Quartus II software. For more information, refer
to “Read-During-Write Behavior” on page 3–19.
MLABs only support a write-enable signal. For MLABs, you can set the same-port
read-during-write behavior to don’t care and the mixed-port read-during-write
behavior to either don’t care or old data. The available choices depend on the
configuration of the MLAB. There is no “new data” option for MLABs.
Stratix IV Device Handbook
Volume 1
December 2011 Altera Corporation