UM220-IV NV User Manual
8
3.4
Pin Definition (Top View)
NC
NC
TXD1
RXD1
VCC
TIME PULSE
NC
NC
NC
NC
AADET_N
nRESET
VCC_RF
GND
RF_IN
GND
V_BCKP
GND
GND
NC
GPIO2
TXD2
RXD2
NC
Top View
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Figure 3-2 UM220-IV NV-GN Top View
No
Name
I/O
Electrical level
Description
1
nRESET
I
LVTTL
For reset, Low level active, if you do not
use the pin, please leave it hanging
2
AADET_N
I
LVTTL
Antenna detection
3
TIMEPULSE
O
LVTTL
Time pulse(1PPS)
4
NC
I
LVTTL
reserve
5
GPIO2
I
LVTTL
Antenna detection
6
TXD2
O
LVTTL
UART 2-TX
7
RXD2
I
LVTTL
UART 2-RX
8
NC
reserve
9
VCC_RF
O
=VCC
Output voltage RF section
10
GND
—
Ground
11
RF_IN
I
GNSS signal input (BDS B1+GPS L1,
GPS L1+GLONASS L1
）
12
GND
—
Ground
13
GND
—
Ground
14
NC
reserve
15
NC
reserve
