_______________________________________________________________________ 2 AsteRx3_OEM
AsteRx3 Product Family Hardware Manual v2.5.0
20
2.7
SD Memory Card Usage
The receiver can interface to an external SD memory card through the SPI-related pins of the 80-pin
connector. The recommended circuit to a 9-pin SD memory card socket is shown below. The four SPI
lines connect to pins#61, #62, #63 and #64 of the 80-pin connector.
When using SD memory card logging, please take note of the following:
1.
SDHC cards are not supported on firmware versions prior to 2.3.
2.
The file system (FAT) is intended to not remove the card: the read-out of the data should be
done through the serial, Ethernet, or USB interfaces.
3.
To avoid data corruption, the card needs to be correctly unmounted before turning off the
power supply. This can be done in two ways:
a.
By entering the “
exePowerMode, StandBy
” command before turning off the
receiver.
b.
By having a sufficient reserve to power the receiver for at least 0.5 seconds after the
disconnection of the main power (e.g. with capacitors). Using pin#8
(nPWR_TOGGLE), an indication needs to be given that the power will be turned off.
All log files are stored in the directory
/ssn/SSRC3
on the card.
Please note that some SD memory cards may not be compatible with Septentrio receivers. The
following card types have been successfully tested:
XceedSD
SDHC 2GB
SanDisk
SDHC 4GB
Kingston
SDHC 16GB
STEC
SD
1GB
SMART
SD
1GB
SanDisk
SDHC 16GB
SanDisk
SDHC 32GB
2.8
Applicable Software Package
The AsteRx3_OEM is compatible with Septentrio’s SSRC3 Software Packages.
