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2.1.3
Local connectivity
SW400
J400
DL405
DL405
J500
J501
DL501
DL403
J103
J102
J406
Figure 4: Local connectivity set up
For communication via the UART interfaces of the cellular module, the following connections are
allowed and can be alternatively enabled in a mutually exclusive way (see
jumper position and LED status):
a. Connect a USB cable to J501 mini-USB connector, so-called cellular USB main UART connector:
the LED DL501 light turns blue. When a USB cable is connected to this mini-USB connector, two
COM ports are enabled in Windows: the main 8-wire UART interface of the cellular module is
available over the first COM port opened by the driver, after the end of the module boot, once the
module is switched on.
b. Connect an RS232 cable to J500 DB9 connector, so-called cellular RS232 main UART connector:
the main 8-wire UART interface of the cellular module is available over RS232, after the end of the
module boot, once the module is switched on.
Type of connections
Access to the main UART interface
over J501 (EVB-WL3)
Access to the main UART interface
over J500 (EVB-WL3)
Access to UART interface(s) over
J104 (ADP-LEXI-R520)
Table 1: Serial interface configuration
☞
See the data sheet
for the description and configuration of the USIO variants.
UBXDOC-686885345-1791 - R02
C1-Public
J403
DL401
SW401
SW403
DL404
DS501
DS500
DL501
DL403
[2]
and the +USIO AT command description in the AT commands manual
J402
J300
J404
DL400
J103
J106
J107
J104
J405
SW401
ON BOARD
ON BOARD
B2B
Board quick start
EVK-LEXI-R520 - User guide
J105
DS100
Table 1
for switches and
SW403
LED
MINIUSB
DL403
DL501
DB9
DL405
Do not care
DL404
Page 7 of 23
[1]
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