EVK-M8QSAM User Guide
UBX-16018104 - R05
Early Production Information
Device description
Page 12 of 23
8
TIMEPULSE1
O
3.3 V
Time pulse 1
1
7
EXTIN0
I
3.3 V
External interrupt input
6
NC
-
-
Not Connected
5
SDA2
I/O
3.3 V
DDC Data
4
SCL2
I/O
3.3 V
DDC Clock
3
TXD1
O
3.3 V
Serial Port
2
RXD1
I
3.3 V
Serial Port
1
GND
I
-
Common ground pin
Table 5: Connector pin description for EVK-M8QSAM
4.3.9
LED
On the mother board of the unit, a single blue LED shows the time pulse 1 signal. The LED starts flashing one
pulse per second during a GNSS fix. If there is no GNSS fit, the LED will only light, without flashing.
4.3.10
Backup Battery
There is a backup battery in the unit. This is necessary to store orbital information between operations and to
enable faster start-up. It is a RENATA 3.0 V Li / MnO² battery of the type CR2450. The battery has a rated
capacity of 540 mA.
CAUTION! RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF
USED BATTERIES ACCORDING TO THE INSTRUCTIONS!
RISK OF SHORT CIRCUIT WHEN TOUCHING THE BATTERY WITH CONDUCTING PARTS!
4.3.11
GNSS Configuration
The EVK-M8QSAM supports concurrent GPS, QZSS, GLONASS, and Galileo reception. By default the M8
receivers are configured for concurrent GPS and GLONASS, including SBAS and QZSS reception.
The GNSS to be used can be configured with u-center (View
Messages View then UBX-CFG-GNSS). For more
information, refer to the
u-center User Guide
[4] and
u-blox 8 / u-blox M8 Receiver Description including
Protocol Specification
[3].
4.3.12
AssistNow
TM
Autonomous
AssistNow Autonomous is enabled by default in the EVK-M8QSAM for faster fix in situations where satellite
signals are weak. For more information about this A-GNSS feature see the
SAM-M8Q Data Sheet
[1].
AssistNow Autonomous is disabled by default in the SAM-M8Q module
In case of using EVK-M8QSAM with simulator, the AssistNow Autonomous should be disabled by using
the UBX-CFG-NAVX5 message. For more information, refer to the
u-blox 8 / u-blox M8 Receiver
Description including Protocol Specification
[3].
1
Time pulse not available in all EVK versions. Please refer to section 4.3.4 on how to check availability of TIMEPULSE1 on your EVK.
