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REB-3300 Operational Manual
Mechanical requirements
26 Weight
3.5g
Power consumption
27 Vcc DC 3.3 ±5%
28 Current REB3300:
Current 65mA@3.3V typical (w/o ext. antenna)
29 Trickle power mode
Average current 65mA. (IO float)
30 Power down mode current 1. It means that the GPS receiver is in power down mode.
2. Current 800 A.
Environment
31 Operating temperature
-40 ~ 85
32 Humidity
95%
33 Interface Protocol 1. NMEA 0183 ver 3.0, GGA, GSA, RMC and GSV once per
2. SiRF Protocol
3. 4800 bps, 8 data bits, no parity, 1 stop bits
Application Circuit
(1) Ground Planes:
REB-3300 GPS receiver needs two different ground planes. The GND_A pin(11
12 13 14 15 16 18) shall be connect to analog ground.
The GND pin(2 10 30) connect to digital ground.
(2) Serial Interface:
The Serial interface pin(RXA TX1 TXB RXB) is recommended to pull up(10K ).
It can increase the stability of serial data.
(3) Backup Battery:
It’s recommended to connect a backup battery to V_BAT.
In order to enable the warm and hot start features of the GPS receiver. If you don’t
intend to use a backup battery, connect this pin to GND or open.
If you use backup battery, shall need to add a bypassing capacitor (10uF) at V_bat
7