at40kal ATMEL Corporation, at40kal Datasheet - Page 4

• Manufacturer Part Number: at40kal
• Description: At40kal Military Reprogrammable Fpgas With Freeram
• Manufacturer: ATMEL Corporation

The Symmetrical
Array
4
AT40KAL
At the heart of the Atmel architecture is a symmetrical array of identical cells (Figure 1).
The array is continuous from one edge to the other, except for bus repeaters spaced
every four cells (Figure 2 on page 5). At the intersection of each repeater row and col-
umn is a 32 x 4 RAM block accessible by adjacent buses. The RAM can be configured
as either a single-ported or dual-ported RAM
nous operation.
Note:
Figure 1. Symmetrical Array Surrounded by I/O (AT40K20)
Note:
1. The right-most column can only be used as single-port RAM.
AT40KAL has registered I/Os. Group enable every sector for tri-states on obuf’s.
= I/O Pad
= AT40K Cell
= Repeater Row
= Repeater Column
(1)
, with either synchronous or asynchro-
= FreeRAM
4263B–AERO–06/03