Sierra Wireless AirPrime XS1110 Product Technical Specification page 15

Rev 4.0 Jul.20
Pin10: BOOT MODE
•
Table 2-3: BOOT MODE Pin Setting
Mode
Normal (Floating)
BootROM (Pull high)
Pin11: INT
•
· This is the interrupt sync. It is used to determine whether NMEA is stored in
the I2C buffer.
· If NMEA data is ready and stored in the I2C buffer, the pin will become
high.
· When the I2C bus is busy, the INT pin becomes high. When the I2C bus is
not busy, the INT pin becomes low.
Pin12: TX0/ _SCL
•
I2C
Through the SYSTEM0 setting, the user can define this pin role as either
UART_TX0 or _SCL.
I2C
· For TX0 pin: UART 0 transmitter; outputs GNSS information for application.
· For _SCL pin: It can transceiver clock and communicate with host.
I2C
Pin13: RX0/ _SDA
•
I2C
Through the SYSTEM0 setting, the user can define this pin role as either
UART_RX0 or _SDA.
I2C
· For RX0 pin: UART 0 receiver; to receive commands from the system.
· For _SDA pin: It can transceiver data and communicate with host.
I2C
Note: UART signals are named with respect to Module and directions are listed with
respect to the module. For example, UART_RX0 is an output from the Host to the module.
UART_TX0 is an output from the module to the Host.
Pin14: 1PPS
•
This pin provides a one pulse-per-second signal output. If not used, keep this
pin floating.
Pin15: NRESET
•
Active on Low for the module to reset. If not used, keep this pin floating.
15
The module automatically enters normal mode by default.
Enter Boot ROM mode to upgrade by firmware using these
steps, when the module does not work normally or the upgrade
fails:
1. The WAKEUP pin must be initially connected to "VCC".
2. Power on the module's main power.
3. Use "SWGNSSTool' to upgrade the firmware.
4. The BOOT MODE pin can be removed from "VCC" when
the upgrade process is completed.
5. Push the NRESET button to reset the module and allow it
to boot up normally.
Specifications
Function
41113354