Embedded Memory
Each M4K block can implement various types of memory with or without
parity, including true dual-port, simple dual-port, and single-port RAM,
ROM, and first-in first-out (FIFO) buffers. The M4K blocks support the
following features:
■
■
■
■
■
■
■
■
■
■
■
■
4,608 RAM bits
250-MHz performance
True dual-port memory
Simple dual-port memory
Single-port memory
Byte enable
Parity bits
Shift register
FIFO buffer
ROM
Various clock modes
Address clock enable
1
Violating the setup or hold time on the memory block address
registers could corrupt memory contents. This applies to both
read and write operations.
Table 2–5 shows the capacity and distribution of the M4K memory blocks
in each Cyclone II device.
Table 2–5. M4K Memory Capacity & Distribution in Cyclone II Devices
Device
M4K Columns
M4K Blocks
Total RAM Bits
EP2C5
2
2
2
2
3
3
5
26
36
119,808
165,888
239,616
239,616
483,840
594,432
1,152,000
EP2C8
EP2C15
EP2C20
EP2C35
EP2C50
EP2C70
52
52
105
129
250
2–28
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2007
ALTERA [ ALTERA CORPORATION ]
