RoyalTek RGM-3550LP - Manual (Page 8)

8
RGM-3550LP User Manual
24 Storage temperature -40 ~ +85℃
(except for SRAM battery backup -40
to +60 degree Celsius)
25 Humidity ≦95%
26 Lead Free Yes
External Antenna RF Input
27 Drive Output Voltage 2.85V ± 0.5%
28 Drive Output Current 30mA (max)
29 Connector Type MMCX
Interface Pin definition (VDD=2.85V
±2%)
Pin # Signal Name I/O Description Characteristics
1 RX I Serial port A VDD V VDD V
IL IH
* 3 . 0 * 7 . 0
≤ ≥
2 TXA O Serial port A VDD V VDD V
OL OH
25 . 0 * 75 . 0
≤ ≥
3 GND G Ground Reference Ground
4 VCC I DC Supply
Voltage input
DC +3.3V
±5%
5 GPS Status O GPS Status VDD V VDD V
OL OH
25 . 0 * 75 . 0
≤ ≥
6 Boot select I Boot mode VDD V VDD V
IL IH
* 3 . 0 * 7 . 0
≤ ≥
EXT
Ant
RFIN
External
Antenna
RF Input
RF IN
External
Antenna RF
Input
% 5 . 0 85 . 2
± =
V V
OUT
) ( 30 Max mA I
Out
=
„ VCC (+3.3V DC power Input)
this is the main DC power supply input pin. It provides voltage to module.
„ GND
Reference Ground Plane of RGM-3550.
„ Boot select
set this pin to high for programming flash.
1. 2. 3 . 4. 5. 6
EXT Ant
RF IN