FLEX 6000 Programmable Logic Device Family Data Sheet
Each IOE drives a row or column interconnect when used as an input or
bidirectional pin. A row IOE can drive up to six row lines; a column IOE
can drive up to two column lines. The input path from the I/O pad to the
FastTrack Interconnect has a programmable delay element that can be
used to guarantee a zero hold time. Depending on the placement of the
IOE relative to what it is driving, the designer may choose to turn on the
programmable delay to ensure a zero hold time. Figure 13 shows how an
IOE connects to a row interconnect, and Figure 14 shows how an IOE
connects to a column interconnect.
Figure 13. IOE Connection to Row Interconnect
Row Interconnect
Any LE can drive
a pin through the
row and local
interconnect.
Up to 10 IOEs are on either
side of a row. Each IOE can
drive up to six row
IOE
LAB
channels, and each IOE data
and OE signal is driven by
the local interconnect.
IOE
FastFLEX I/O: An LE can drive a pin through the
local interconnect for faster clock-to-output times.
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