atf280e ATMEL Corporation, atf280e Datasheet - Page 14

• Manufacturer Part Number: atf280e
• Description: Rad Hard Reprogrammable Fpga
• Manufacturer: ATMEL Corporation

4. ATF280E FPGA Architecture
4.1
14
The Symmetrical Array
ATF280E
At the heart of the Atmel ATF280E architecture is a symmetrical array of identical cells. The
array is continuous from one edge to the other, except for bus repeaters spaced every four cells.
At the intersection of each repeater row and column is a 32 x 4 RAM block accessible by adja-
cent buses. The RAM can be configured as either a single-ported or dual-ported RAM
either synchronous or asynchronous operation
Figure 4-1.
Note:
1. the right-most column can only be used as single-port RAM.
Core device overview
7750A–AERO–07/07
(1)
, with