EP1C20F ALTERA [Altera Corporation], EP1C20F Datasheet - Page 46

• Manufacturer Part Number: EP1C20F
• Description: Cyclone FPGA Family
• Manufacturer: ALTERA [Altera Corporation]

Cyclone Device Handbook, Volume 1
2–40
Preliminary
Figure 2–27. Cyclone IOE Structure
Note to
(1)
The IOEs are located in I/O blocks around the periphery of the Cyclone
device. There are up to three IOEs per row I/O block and up to three IOEs
per column I/O block (column I/O blocks span two columns). The row
I/O blocks drive row, column, or direct link interconnects. The column
I/O blocks drive column interconnects.
I/O block connects to the logic array.
I/O block connects to the logic array.
There are two paths available for combinatorial inputs to the logic array. Each path
contains a unique programmable delay chain.
Figure
Logic Array
Combinatorial
2–27:
input (1)
Output
Input
OE
Output Register
Input Register
OE Register
D
D
D
Figure 2–29
Q
Q
Q
Figure 2–28
shows how a column
shows how a row
Altera Corporation
May 2008