GXB5005 Datasheet, PDF (10/12 Pages) Sony Corporation – SMD Type GPS Receiver Module

GXB5005
Backup Mode
The backup mode is established by setting all inputs Low except for B.U. (Vbat: 2.6 to 3.0V). In this mode, the
low power consumption can be achieved by stopping all oscillators except for RTC oscillator. Although all
registers are initialized, the SRAM for both of Ephemeris data and Almanac data in backup area are held.
Antenna Sense (Option)
The antenna sensing function detects three kinds of external active antenna connection conditions, open/
normal/short, by using A/D converter incorporated into the CXD2951.
The @ANT command shows the previous antenna sensing result and users would know the three kinds of
conditions. For details, see the CXD2951 Communication Command Specifications.
RTC
T + 1 T + 2 T + 3 T + 4 T + 5 T + 6 T + 7 T + 8 T + 9 T + 10 T + 11 T + 12 T + 13 T + 14 T + 15 T + 16 T + 17 (Second)
Antenna
condition
VDD
Voltage
(RFIN)
0
open
normal
Approx.1s
short
normal
Approx. 3s
Approx. 3s
Antenna status detection timing
Threshold Levels
The threshold current Ir is as follows when VDD = 3.3V.
Š open:
Ir < 3.6mA
Š normal: 3.7mA ≤ Ir ≤ 44.0mA
Š short: 44.0mA < Ir
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