IO20PDB0V0 datasheet(36/197 Pages) MICROSEMI

36 / 197 page

SmartFusion DC and Switching Characteristics

2- 24

R e v i sio n 1 2

Summary of I/O Timing Characteristics – Default I/O Software

Settings

Table 2-21 • Summary of Maximum and Minimum DC Input Levels

Applicable to Commercial Conditions in all I/O Bank Types

DC I/O Standards

Commercial

IIL

IIH

µA

3.3 V LVTTL / 3.3 V LVCMOS

2.5 V LVCMOS

1.8 V LVCMOS

1.5 V LVCMOS

3.3 V PCI

3.3 V PCI-X

Table 2-22 • Summary of AC Measuring Points Applicable to All I/O Bank Types

Standard

Measuring Trip Point (Vtrip)

3.3 V LVTTL / 3.3 V LVCMOS

1.4 V

2.5 V LVCMOS

1.2 V

1.8 V LVCMOS

0.90 V

1.5 V LVCMOS

0.75 V

3.3 V PCI

0.285 * VCCxxxxIOBx (RR)

0.615 * VCCxxxxIOBx (FF)

3.3 V PCI-X

0.285 * VCCxxxxIOBx (RR)

0.615 * VCCxxxxIOBx (FF)

LVDS

Cross point

LVPECL

Cross point

Table 2-23 • I/O AC Parameter Definitions

Parameter

Parameter Definition

tDP

Data to pad delay through the output buffer

tPY

Pad to data delay through the input buffer

tDOUT

Data to output buffer delay through the I/O interface

tEOUT

Enable to output buffer tristate control delay through the I/O interface

tDIN

Input buffer to data delay through the I/O interface

tHZ

Enable to pad delay through the output buffer—High to Z

tZH

Enable to pad delay through the output buffer—Z to High

tLZ

Enable to pad delay through the output buffer—Low to Z

tZL

Enable to pad delay through the output buffer—Z to Low

tZHS

Enable to pad delay through the output buffer with delayed enable—Z to High

tZLS

Enable to pad delay through the output buffer with delayed enable—Z to Low

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