EP1M350 datasheet(46/86 Pages) ALTERA

46 / 86 page

Altera Corporation

Mercury Programmable Logic Device Family Data Sheet

Figure 25. ESB Control Signal Generation

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.

INCLOCK

INCLOCKEN

OUTCLOCK

OUTCLOCKEN

Dedicated

Clocks

Fast Global

Signals

Local

Interconnect

Local

Interconnect

Local

Interconnect

Local

Interconnect

Local

Interconnect

Local

Interconnect

WREN

INCLR

OUTCLR

RDEN

EP1M350 Datasheet(PDF) 46 Page - Altera Corporation

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