Embedded Artists GPS Receiver Board EA-ACC-023 EA-ACC-023 Datenbogen
Produktcode
EA-ACC-023
GlobalTop PMTK command packet
Rev.A08
The document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, or any other format without prior permission of GlobalTop
Tech Inc. Specifications subject to change without prior notice
Tech Inc. Specifications subject to change without prior notice
GlobalTop Tech Inc.
No.16 Nan-ke 9th Rd Science-based Ind. Park, Tainan 741-47, Taiwan, R.O.C.
Tel:+886-6-5051268 Fax:+886-6-5053381
http://www.gtop-tech.com/
email: sales@gtop-tech.com
Copyright© 2011 GlobalTop Tech Inc. All right reserved
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16
Packet Type
：225 PMTK_CMD_PERIODIC_MODE
Support Chip Type:
MT3339
MT3339
Packet Meaning
：
Enter Standby or Backup mode for power saving.
DataField
DataField
：
PMTK225,Type,First Run time,First Sleep time, Second run time,Second sleep time
Type: operation mode
‘0’ = go back to normal mode
‘1’ = backup type of periodic mode
‘2’ = standby type of periodic mode
‘8’ = AlwaysLocate
Type: operation mode
‘0’ = go back to normal mode
‘1’ = backup type of periodic mode
‘2’ = standby type of periodic mode
‘8’ = AlwaysLocate
TM
standby mode
‘9’ = AlwaysLocate
TM
backup mode
First Run time (millisecond): operation time
First Sleep time (millisecond): sleep time
Second run time (millisecond): it use for cold boot condition
Second sleep time (millisecond): it use for cold boot condition
Example
First Sleep time (millisecond): sleep time
Second run time (millisecond): it use for cold boot condition
Second sleep time (millisecond): it use for cold boot condition
Example
：
$PMTK225,1,3000,12000,18000,72000*16<CR><LF>
$PMTK225,8*23<CR><LF>
$PMTK225,9*22<CR><LF>
$PMTK225,0*2B<CR><LF>
$PMTK225,8*23<CR><LF>
$PMTK225,9*22<CR><LF>
$PMTK225,0*2B<CR><LF>
Note
：
：
：
：
1.
The purpose of second run time and sleep time can let module to catch more satellite ephemeris data in cold boot
condition. The value of them can be null. Then it will use the first run time and sleep time for ephemeris data receiving.
condition. The value of them can be null. Then it will use the first run time and sleep time for ephemeris data receiving.
2.
AlwaysLocate
TM
is an intelligent controller of MT3339 periodic mode. Depending on the environment and motion
conditions, MT3339 can adaptive adjust the on/off time to achieve balance of positioning accuracy and power
consumption
consumption
Packet Type
：286 PMTK_CMD_AIC_MODE
Support Chip Type:
MT3339
MT3339
Packet Meaning
：
Active Interference Cancellation (AIC) feature provides effective narrow-band interference and jamming
elimination.
elimination.