EP2A15 Datasheet, PDF (39/99 Pages) Altera Corporation – Programmable Logic Device Family

Figure 25. APEX II IOE Structure
Logic Array
OE
APEX II Programmable Logic Device Family Data Sheet
OE Register
DQ
OE Register
DQ
Output A
Output Register
DQ
CLK
Output Register
Output B
DQ
Input A
Input B
Input Register
DQ
Input Register
DQ
Input Latch
DQ
ENA
Altera Corporation
The IOEs are located around the periphery of the APEX II device. Each
IOE drives a row, column, MegaLAB, or local interconnect when used as
an input or bidirectional pin. A row IOE can drive a local, MegaLAB, row,
and column interconnect; a column IOE can drive the FastTrack or column
interconnect. Figure 26 shows how a row IOE connects to the
interconnect.
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