GNSS Module Series
L89 EVB User Guide
L89_EVB_User_Guide 13 / 26
Table 4: L89 EVB Switches and Buttons
3.4. Operation Status Indication LEDs
Figure 7: Operation Status Indication LEDs
Table 5: Operation Status Indication LEDs
Part No.
Name
I/O
Description
S301
RESET
DI
When the button is pressed and then released,
the module will be reset.
S302
FORCE_ON
DI
Configured to exit Backup mode of L89 EVB.
S401
DL
DI
Please refer to
Chapter 4.2.2 for details.
S101
POWER
PI
Configured to control power supply by using
Micro-USB interface.
S201
USB
↔SD
IO
Please keep the switch on USB side
Part No.
Name
I/O
Description
D304
TXD
DO
Flash: The module is started successfully, and either
Micro-USB or SD card interface can be used to
output messages.
Extinct: The module fails to be started.
D303
1PPS
DO
Flash: Successful position fix. The frequency is 1Hz.
Extinct: No position fix.
D307
AADET_N
DO
High: The module has no external active antenna.
Low: The module works by using an internal antenna.
