ep1m120 Altera Corporation, ep1m120 Datasheet - Page 46

• Manufacturer Part Number: ep1m120
• Description: Programmable Logic Device Family
• Manufacturer: Altera Corporation

Mercury Programmable Logic Device Family Data Sheet
Figure 25. ESB Control Signal Generation
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Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Dedicated
Clocks
Fast Global
Signals
The ESB can drive row interconnects within its own ESB row and can
directly drive all the column interconnects: column, priority column, and
leap lines.
Implementing Logic in ROM
In addition to implementing RAM functions, the ESB can implement logic
functions when it is programmed with a read-only pattern during
configuration, creating a large LUT. With LUTs, combinatorial functions
are implemented by looking up the results, rather than by computing
them. This implementation of combinatorial functions can be faster than
using algorithms implemented in general logic, a performance advantage
further enhanced by the fast access times of ESBs. The large capacity of
ESBs enables designers to implement complex functions in one logic level
without the routing delays associated with linked LEs or distributed RAM
blocks. Parameterized functions such as LPM functions can take
advantage of the ESB automatically. Further, the Quartus II software can
implement portions of a design with ESBs where appropriate.
4
6
INCLOCK
INCLOCKEN
OUTCLOCK
OUTCLOCKEN
RDEN
WREN
Altera Corporation
INCLR
OUTCLR