Specifications

L70 Hardware Design
L70_HD_V1.0 - 21 -
3.6.4. AlwaysLocate
TM
standby mode
AlwaysLocate
TM
is an intelligent controller of L70 normal mode and standby mode. AlwaysLocate
TM
standby mode supports the module to switch automatically between normal mode and standby mode.
According to the environmental and motion conditions, the module can adaptively adjust the on/off
time to achieve the balance between positioning accuracy and power consumption.
For more details, please refer to chapter 2.4.2.
3.7. UART interface
The module provides one universal asynchronous receiver & transmitter serial port. The module is
designed as a DCE (Data Communication Equipment), following the traditional DCE-DTE (Data
Terminal Equipment) connection. The module and the client (DTE) are connected through the
following signal shown as Figure 10. It supports data baud-rate from 4800bps to 115200bps.
UART port
 TXD1: Send data to the RXD signal line of DTE
 RXD1: Receive data from the TXD signal line of DTE
Table 9: Pin definition of the UART interfaces
Interface
Name
Pin No.
Function
UART Port
TXD1
2
Transmit data
RXD1
3
Receive data
CUSTOMER (DTE)
TXD
RXD
GND
MODULE (DCE)
Serial port
TXD1
RXD1
GND
Figure 10: Connection of serial interfaces
This UART port has the following features:
 UART port can be used for firmware upgrade, NMEA output and PMTK proprietary messages
Quectel
Confidential