Description Of I/O Pins - Sierra Wireless AirPrime XS1110 Product Technical Specification

Product Technical Specification
Table 2-1: Pin Assignment (Continued)
Pin Name
12 TX0 /
I2C_SCL
13 RX0 /
I2C_SDA
14
1PPS
15 NRESET
16
WAKE UP
a. I = Input, O = Output, PU = Pull Up, PD = Pull Down, H = High, T = High Impedance
Rev 4.0 Jul.20
I/O Description and Note
I/O Serial data output for
NMEA output (TTL) / I2C
series clock (in slave mode)
I/O Serial data output for
firmware update (TTL) / I2C
series data (in slave mode)
O 1PPS time mark output
I Reset input
I Wake up from power saving

Description of I/O Pins

Pin1: GND (Ground)
•
Pin2: RF_IN
•
The GNSS RF signal input which can be connected to a passive antenna.
Pin3: GND (Ground)
•
Pin4: GND (Ground)
•
Pin5: VCC
•
Main DC power supply (1.71 V to 1.89 V; typical: 1.8 V)
Pin6: GND (Ground)
•
Pin7: GND (Ground)
•
Pin8: GND (Ground)
•
Pin9: SYSTEM0
•
Can be used to set the UART or I2C interface.
Table 2-2: SYSTEM0 Setting
SYSTEM0
High (default 1.8 V)
Low
Active IO
Low / Voltage
High Domain
1.8V
1.8V
1.8V
L 1.8V
H 0V
UART
I2C
14
Reset
Recommendation
a
State for Unused Pad
Mandatory connection
Mandatory connection
a
O, PU Left open
a
I, PU Left open
a
I, PD Left open
Interface
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