User's Manual

NOVATEL WIRELESS
TECHNOLOGIES LTD.
Calgary, Alberta
TITLE:
Hardware Interface Specification for
Expedite Wireless IP Modem
DOCUMENT NO.:
OM-01016529
SHEET:
9 of 17
REV:
3.0
4.1.3 Pin Descriptions
Pin # Name Direction Power-on
Reset State
Description
13, 14 Vcc1 POWER POWER SUPPLY CONNECTION TO THE MODEM FOR ALL
CIRCUITRY EXCEPT FOR THE RF POWER AMPLIFIER.
15, 16 Vcc2 POWER POWER SUPPLY CONNECTION TO THE MODEM FOR THE RF
POWER AMPLIFIER ONLY
1,2 &
23,24
GND POWER MODEM GROUND
3 PWR_IND OUTPUT POWER INDICATOR:
HI: INDICATES THAT THE MODEM IS ON
LO INDICATES THAT THE MODEM IS OFF
5 SM_IND OUTPUT SLEEP MODE INDICATOR:
HI: INDICATES THAT THE MODEM IS IN SLEEP MODE
LO INDICATES THAT THE MODEM IS NOT IN SLEEP MODE
4 WKUP INPUT WAKE UP INPUT: (ACTIVE HI PULSE)
A PULSE APPLIED TO THIS PIN WILL TURN ON THE MODEM IF
THE MODEM IS OFF, OR WAKE UP THE MODEM IF THE MODEM IS
IN SLEEP MODE. REFER TO THE APPLICATIONS INFORMATION
SECTION FOR MORE DETAILS ON USING THE WAKE UP PIN.
6 DTM INPUT DATA TO MODEM:
(3.3 VOLT LOGIC LEVEL)
IN RS232 TERMS, THIS IS CALLED "TXD".
7 DFM OUTPUT DATA FROM MODEM:
(3.3 VOLT LOGIC LEVEL)
IN RS232 TERMS, THIS IS CALLED "RXD".
11 RTS INPUT READY TO SEND:
(3.3 VOLT LOGIC LEVEL)
10 CTS OUTPUT CLEAR TO SEND:
(3.3 VOLT LOGIC LEVEL)
8 DTR INPUT DTE READY:
(3.3 VOLT LOGIC LEVEL)
9 DSR OUTPUT DCE READY:
(3.3 VOLT LOGIC LEVEL)
12 GPIO1 BI-
DIRECTIONAL
INPUT WITH
PULLUP
GENERAL PURPOSE CONFIGURABLE INPUT OR OUTPUT:
REFER TO THE AT COMMAND SET FOR THE DEFAULT STATE.
17 GPIO2 BI-
DIRECTIONAL
INPUT WITH
PULLUP
GENERAL PURPOSE CONFIGURABLE INPUT OR OUTPUT:
REFER TO THE AT COMMAND SET FOR THE DEFAULT STATE.
18 GPIO3 BI-
DIRECTIONAL
INPUT WITH
PULLDOWN
GENERAL PURPOSE CONFIGURABLE INPUT OR OUTPUT:
REFER TO THE AT COMMAND SET FOR THE DEFAULT STATE.
19 GPIO4 BI-
DIRECTIONAL
INPUT WITH
PULLUP
GENERAL PURPOSE CONFIGURABLE INPUT OR OUTPUT:
REFER TO THE AT COMMAND SET FOR THE DEFAULT STATE.
20 GPIO5 BI-
DIRECTIONAL
INPUT WITH
PULLDOWN
GENERAL PURPOSE CONFIGURABLE INPUT OR OUTPUT:
REFER TO THE AT COMMAND SET FOR THE DEFAULT STATE.
21 GPIO6 BI-
DIRECTIONAL
INPUT WITH
PULLUP
GENERAL PURPOSE CONFIGURABLE INPUT OR OUTPUT:
REFER TO THE AT COMMAND SET FOR THE DEFAULT STATE.
22 ADC_IN ANALOG
INPUT
ADC INPUT ADC INPUT:
THIS PIN IS CONNECTED TO ONE CHANNEL OF AN 8-BIT ADC.
REFER TO THE AT COMMAND SET ON HOW TO READ THIS ADC
VALUE.