Rainbow-electronics ATF1500ABV Bedienungsanleitung PDF herunterladen (Seite 12)

ATF1500ABV

0723I–08/01

Output Slew

Rate Control

Each ATF1500ABV macrocell contains a configuration bit for each I/O to control its output

slew rate. This allows selected data paths to operate at maximum throughput while reducing

system noise from outputs that are not speed-critical. Outputs default to slow edges, and may

be individually set to fast in the design file. Output transition times for outputs configured as

“slow” have a t

SSO

delay adder.

Security Fuse

Usage

A single fuse is provided to prevent unauthorized copying of the ATF1500ABV fuse patterns.

Once programmed, fuse verify and preload are prohibited. However, the 160-bit User Signa-

ture remains accessible.

The security fuse should be programmed last, as its effect is immediate.

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Rainbow-electronics ATF1500ABV Bedienungsanleitung Seite 12