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.
TriMatrix
Memory
Table 2–3. TriMatrix Memory Features (Part 1 of 2)
M512 RAM Block M4K RAM Block M-RAM Block
Memory Feature
(32 × 18 Bits)
(128 × 36 Bits) (4K × 144 Bits)
Maximum
(1)
(1)
(1)
performance
True dual-port
memory
v
v
v
Simple dual-port
memory
v
v
v
Single-port memory
Shift register
ROM
v
v
v
v
v
v
v
v
v
v
v
v
(2)
FIFO buffer
v
v
v
v
Byte enable
Parity bits
v
v
v
Mixed clock mode
Memory initialization
Simple dual-port
memory mixed width
support
v
v
v
v
True dual-port
memory mixed width
support
v
Power-up conditions
Outputs cleared
Outputs cleared Outputs
unknown
Register clears
Input and output
registers
Input and output Output registers
registers
Mixed-port read-
during-write
Unknown
output/old data
Unknown
output/old data
Unknown output
Altera Corporation
July 2005
2–21
Stratix Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
