at40k20al-1dqc ATMEL Corporation, at40k20al-1dqc Datasheet - Page 4

• Manufacturer Part Number: at40k20al-1dqc
• Description: At40k05al 5k - 50k Gates Coprocessor Fpga With Freeram
• Manufacturer: ATMEL Corporation

The Symmetrical
Array
4
AT40KAL Series FPGA
At the heart of the Atmel architecture is a symmetrical array of identical cells,
see Figure 1. The array is continuous from one edge to the other, except for bus
repeaters spaced every four cells, see Figure 2 on page 5. At the intersection of each
repeater row and column there 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
synchronous or asynchronous operation.
Note:
Figure 1. Symmetrical Array Surrounded by I/O (AT40K20AL)
Note:
1. The right-most column can only be used as single-port RAM.
1. AT40KAL has registered I/Os. Group enable on every sector for tri-states on obufe’s.
= I/O Pad
= AT40K Cell
= Repeater Row
= Repeater Column
(1)
= FreeRAM
2818F–FPGA–07/06
(1)
, with either