9
3.2 Notes for Pin
Table 3-1 Notes for Pin
Pin
I/O
Description
Note
Power
Supply
VCC
Power
source
Power supply
Stable, uninterruptible, and low-ripple
power; the peak value of ripple voltage
should not exceed 50mVpp.
MCX
Power
source
Antenna
power supply
Active antennas supply power at a
corresponding voltage. Do not connect
the antenna to the port of antenna in the
module, and use a multimeter for testing,
that is, the voltage supply is DC4.8 V ~
5.4 V when there is no-load. When the
RF port of the module is connected to the
antenna, the working current is 30~100
mA at normal temperature, and the
antenna feed of DC4.6 V
±
0.2 V can be
supplied to the outside.
GND
Power
source
Ground
Ground all GND signals of the board,
preferably with a larger area of copper
pour.
UART
TXD1
O
Send from
Serial Port 1
Output by Serial Port 1; leave vacant if
not necessary.
RXD1
I
Receive by
Serial Port 1
Output by Serial Port 1; leave vacant if
not necessary.
TXD2
O
Send from
Serial Port 2
Output by Serial Port 2; leave vacant if
not necessary.
RXD2
I
Receive by
Serial Port 2
Output by Serial Port 2; leave vacant if
not necessary.
TXD3
O
Send from
Serial Port 3
Output by Serial Port 3; leave vacant if
not necessary.
RXD3
I
Receive by
Serial Port 3
Output by Serial Port 3; leave vacant if
not necessary.
3.3 Antenna
Antenna input MCX interface of UB4B0M provides an antenna feed of 4.6
±
0.2 V. Do not
connect the antenna to the port of antenna in the module, and use a multimeter to test,
that is, the voltage supply is DC4.8 V ~ 5.4 V when there is no-load. When the RF port of
the module is connected to the antenna, the working current is 30~100 mA at normal
temperature, and the antenna feed of DC4.6 V
±
0.2 V can be supplied to the outside.
