Rgm-3550lp user manual – RoyalTek RGM-3550LP User 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