Sierra Wireless AirLink FXT Series Guia do Utilizador descarregar pdf (Página 54)

WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 54

Fastrack Xtend User Guide

Signals and Indicators

When used (as an emergency reset), it has to be driven by either an open collector or an open drain

output.

Caution: This signal is for emergency resets only.

Table 37. Fastrack Xtend Reset Status

(Serial

Port) Pin #

Signal

I/O

I/O Type

Voltage

Description

Reset

I/O

Open drain

1V8

Fastrack Xtend Reset

Table 38. Reset Electrical Characteristics

Parameter

Minimum

Typical

Maximum

Unit

Input Impedance (R)*

100.3

k

Input Impedance (C)

* Internal pull-up

Table 39. Reset Operating Conditions

Parameter

Minimum

Typical

Maximum

Unit

~Reset time (Rt)

200

µs

~Reset time (Rt)

(at power up only)

100

Cancellation time (Ct)

0.57

1.33

* V

= Hysterisis Voltage

1: This reset time is the minimum to be carried out on the ~Reset signal when the power supply is stabilized.

2: This reset time is internally carried out by the embedded module power supply supervisor only when the

embedded module power supplies are powered ON.

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