EP2C8 datasheet(40/168 Pages) ALTERA

40 / 168 page

2–28

Altera Corporation

Cyclone II Device Handbook, Volume 1

February 2007

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

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

119,808

EP2C8

165,888

EP2C15

239,616

EP2C20

239,616

EP2C35

105

483,840

EP2C50

129

594,432

EP2C70

250

1,152,000

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