Sierra Wireless AirLink FXT Series Spezifikationen PDF herunterladen (Seite 23)

WA_DEV_FEX20_PTS_004 Rev 001 June 30, 2010 23

Expansion Card Product Technical

Specification

Interfaces

Table 10: Reset State Definition

Parameter

Definition

Set to GND

Set to supply 1V8 or 2V8 depending on I/O type

Pull-down

Internal pull-down with ~60K resistor.

Pull-up

Internal pull-up with ~60K resistor to supply 1V8 or 2V8 depending on I/O type.

High impedance

Undefined

Caution: Undefined must not be used in an application if a special state is required at reset.

These pins may be a toggling a signal(s) during reset.

4.3. General Purpose Input/Output

The Expansion Card provides a total of 20 General Purpose I/O. These can be used to control any

external device such as GPS, Bluetooth, LCD or any other external application.

Note that these GPIOs are only available if the multiplexed counterparts aren’t used.

Refer to the table below for the pin description of the GPIO.

Table 11: GPIO Pin Description

Pin Number

Signal

I/O

I/O Type

Reset State

Multiplexed With

GPIO3

I/O

1V8

INT0

GPIO8

I/O

1V8

Pull-up

Not mux

GPIO14

I/O

1V8

CT103 / TXD2

GPIO15

I/O

1V8

CT104 / RXD2

GPIO16

I/O

1V8

~CT106 / CTS2

GPIO17

I/O

1V8

~CT105 / RTS2

GPIO19

I/O

2V8

Not mux

GPIO20

I/O

2V8

Undefined

Not mux

GPIO22

I/O

2V8

Not mux*

GPIO23

I/O

2V8

Not mux*

GPIO26

I/O

Open Drain

SCL

GPIO27

I/O

Open Drain

SDA

GPIO28

I/O

2V8

SPI1-CLK

GPIO29

I/O

2V8

SPI1-IO

GPIO30

I/O

2V8

SP1-I

GPIO31

I/O

2V8

~SPI1-CS

GPIO32

I/O

2V8

SPI2-CLK

GPIO33

I/O

2V8

SPI2-IO

GPIO34

I/O

2V8

SP2-I

GPIO35

I/O

2V8

~SPI2-CS

GPIO41

I/O

2V8

~CT108-2 / DTR1

* If a Bluetooth module is used, these GPIOs must be reserved.

Refer to section 4.2 Electrical Information for Digital I/O for open drain, 2V8 and 1V8 voltage

characteristics and reset state definitions.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 59 60

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