B.1.1. Bus interface characteristics

Table B.1 lists the baseboard electrical characteristics for normal operation.

Note

The DC IN voltage passes through a FET that disconnects the supply if the voltage is out of the normal operating range.

Table B.1. baseboard electrical characteristics

Symbol

Description

Min.

Max.

Unit

DC IN

DC input voltage11.412.6

V

12V

Supply voltage from terminal or PCI11.412.6

V

3V3

Supply voltage from attached tile (interface signals)

3.1

3.5

V

5V

Supply voltage

4.75

5.25

V

VIH

High-level input voltage

2.0

3.6

V

VIL

Low-level input voltage

0

0.8

V

VOH

High-level output voltage

2.4

-

V

VOL

Low-level output voltage

-

0.4

V

CIN

Capacitance on any input pin

-

20

pF


Note

The HRDX and HRDY headers signals have the interface voltage set by external voltage reference determined by the tile connected, see Power supply. The signals are, by default, LVCMOS levels (1.2V-3.3V).

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