Stratix II Architecture
Figure 2–46. Stratix II IOE Structure
Logic Array
OE Register
D
Q
OE
OE Register
D
Q
Output Register
D
Q
Output A
Output B
CLK
Output Register
D
Q
Input Register
D
Q
Input A
Input B
Input Latch
Input Register
D
Q
D
Q
ENA
The IOEs are located in I/O blocks around the periphery of the Stratix II
device. There are up to four IOEs per row I/O block and four IOEs per
column I/O block. The row I/O blocks drive row, column, or direct link
interconnects. The column I/O blocks drive column interconnects.
Figure 2–47 shows how a row I/O block connects to the logic array.
Figure 2–48 shows how a column I/O block connects to the logic array.
Altera Corporation
May 2007
2–71
Stratix II Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
