IO13PDB0V0 datasheet(18/197 Pages) MICROSEMI

18 / 197 page

SmartFusion DC and Switching Characteristics

2- 6

R ev isio n 1 2

Figure 2-1 •

I/O State as a Function of VCCxxxxIOBx and VCC Voltage Levels

VCCxxxxIOBx

Region 1: I/O buffers are OFF

Region 2: I/O buffers are ON.

I/Os are functional (except differential inputs)

but slower because VCCxxxxIOBx / V

CC are

below specification. For the same reason, input

buffers do not meet VIH / VIL levels, and

output buffers do not meet VOH / VOL levels.

Min VCCxxxxIOBx datasheet specification

voltage at a selected I/O

standard; i.e., 1.425 V or 1.7 V

or 2.3 V or 3.0 V

VCC

VCC = 1.425 V

Region 1: I/O Buffers are OFF

Activation trip point:

Va = 0.85 V ± 0.25 V

Deactivation trip point:

Vd = 0.75 V ± 0.25 V

Activation trip point:

Va = 0.9 V ± 0.3 V

Deactivation trip point:

Vd = 0.8 V ± 0.3 V

VCC = 1.575 V

Region 5: I/O buffers are ON

and power supplies are within

specification.

I/Os meet the entire datasheet

and timer specifications for

speed, VIH / VIL , VOH / VOL , etc.

Region 4: I/O

buffers are ON.

I/Os are functional

(except differential

but slower because

below specification. For the

same reason, input buffers do not

meet VIH / VIL levels, and output

buffers do not meet VOH / VOL levels.

where VT can be from 0.58 V to 0.9 V (typically 0.75 V)

VCCxxxxIOBx

Region 3: I/O buffers are ON.

I/Os are functional; I/O DC

specifications are met,

but I/Os are slower because

the VCC is below specification.

VCC = VCCxxxxIOBx + VT

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