Maestro A2200-A Bedienungsanleitung PDF herunterladen (Seite 29)

V1.0 – Feb-12

User’s Manual

Page 29 of 35

duty cycles, it is necessary to toggle the ON_OFF pin. Toggling is done by pulling the

signal to HIGH for about 100ms.

10.5 Hibernate Mode

In order to enter Hibernate Mode it is necessary to send a shutdown command or to

toggle to ON_OFF pin by pulling the signal to HIGH for about 100ms. Starting with

firmware version 4.0.1 the according command is supported in NMEA and SiRF

Binary mode. After a short delay the module will switch into hibernate mode. The

RTC will keep on running and SRAM is backed with the typical current of 20 μA

drawn from Vcc. To wake the module up again, toggling the ON_OFF pin is neces-

sary (100ms pulse width).

10.6 Extended Ephemeris

The receiver is capable of supporting two versions of using Extended Ephemeris

(EE) data. The first one is the version, where the EE data are calculated on a server,

are transmitted to device incorporating the receiver, and are then loaded into the

receiver. These data can be valid for up to seven days.

The second version is the internal extrapolation of available “natural” Ephemeris

data. This is done automatically and no external support is required. The internally

calculated EE data are valid for up to 3 days.

The receiver firmware will define which set of EE data to use or will neglect those in

case “natural” data are available(need add an external EEPROM part). Both versions

of EE data will help to further lower power consumption in SiRFaware

mode.

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 35

Keine Kommentare

Maestro A2200-A Bedienungsanleitung Seite 29