Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page
35
of
58
FLASHBACKUP
–
Setting of backup in Flash
△
4 Format:
1
2
Num
Contents
Range
Default
Remark
1
FLASHBACKUP
-
-
Command Name
2
type
0x00 to
0x07
(HEX)
0x00
Target of backup
Each bit represents one command setting
0x01 : FREQ command setting
0x02 : DEFLS command setting
0x04 : TIMEALIGN command setting
0x00 means that flash backup is initialised.
Example:
$PERDAPI,FLASHBACKUP,0x03*4E
Current setting of FREQ and DEFLS command is stored in flash.
Notes:
-
This data stored in Flash is erased when software update.
-
This data stored in Flash is not erased by factory cold restart.
-
Hot start is occurred when this command is input.
-
Please don’t turn off GT-87 during this command is sent.
Restriction:
GT-87 has two ways to backup data.
[1] BBRAM
BBRAM is RAM which is available to store data as long as backup current is impressed. GT-87 can
store ephemeris data, almanac data and configuration which user sets by commands etc in BBRAM,
and the data is not erased even if GT-87 is turned off.
The backup timing of BBRAM is every second. The data is cleared when user inputs RESTART
command and/or user turns off backup current.
[2] FLASH
GT-87 can store FREQ command setting, DEFLS command setting and/or TIMEALIGN command
setting in flash when user inputs FLASHBACKUP command. The data is not erased even if GT-87 is
turned off or RESTART command. The data is cleared when user inputs FLASHBACKUP command or
software update.
If GT-87 has different backup data between BBRAM and Flash, BBRAM data have a priority over flash.
In this case, when the data of BBRAM is invalid because that backup current is turned off, Flash data
is applied.
$PERDAPI , FLASHBACKUP , type *hh <CR> <LF>
