EP1S30F780I6N Datasheet, PDF (45/292 Pages) Altera Corporation – Stratix Device Handbook, Volume 1

TriMatrix
Memory
Stratix Architecture
TriMatrix memory consists of three types of RAM blocks: M512, M4K,
and M-RAM blocks. Although these memory blocks are different, they
can all implement various types of memory with or without parity,
including true dual-port, simple dual-port, and single-port RAM, ROM,
and FIFO buffers. Table 2–3 shows the size and features of the different
RAM blocks.
Table 2–3. TriMatrix Memory Features (Part 1 of 2)
Memory Feature
M512 RAM Block M4K RAM Block M-RAM Block
(32 × 18 Bits) (128 × 36 Bits) (4K × 144 Bits)
Maximum
performance
(1)
(1)
(1)
True dual-port
memory
v
v
Simple dual-port
memory
v
v
v
Single-port memory
v
v
v
Shift register
v
v
ROM
v
v
(2)
FIFO buffer
v
v
v
Byte enable
v
v
Parity bits
v
v
v
Mixed clock mode
v
v
v
Memory initialization
v
v
Simple dual-port
memory mixed width
v
support
v
v
True dual-port
memory mixed width
support
v
v
Power-up conditions Outputs cleared Outputs cleared Outputs
unknown
Register clears
Input and output Input and output Output registers
registers
registers
Mixed-port read-
during-write
Unknown
output/old data
Unknown
Unknown output
output/old data
Altera Corporation
July 2005
2–21
Stratix Device Handbook, Volume 1