5
Table 2-2 Pin Definition
No
Pin
I/O
Description
1
GND
-
Ground
2
ANT_IN
I
GNSS antenna signal input
3
GND
-
Ground
4
GND
-
Ground
5
ANT_PWR
I
GNSS antenna power supply
6
GND
-
Ground
7
ANT_NLOD
O
GNSS antenna open circuit indicator
1: normal
0: antenna is open circuit
8
ANT_FFLG
O
GNSS antenna short circuit indicator
1: normal
0: antenna is short circuit
9
GND
Power
DGND/GND
10
RSV
-
RSV
11
RSV
-
RSV
12
RSV
-
RSV
13
RSV
-
RSV
14
GND
-
Ground
15
SPEED
I
Odometer- pulse
16
FWR
I
Odometer- direction
17
V_BACKUP
I
When the main power supply of the module VCC is
cut off, V_BCKP supplies power to RTC and SRAM.
Level requirements: 2.0~ 3.6 V, and the working
current is about 10uA. Can be suspended without
using the hot start function.
18
GND
-
Ground
19
PVT STAT
O
PVT positioning indicator, active-high. The module
outputs high level when positioning is available and
outputs low level when no positioning is
proceeded.
20
GPIO2
I/O
Common IO
21
RSV
-
RSV
22
FRESET_N
I
Reset to factory default (clear all user settings),
LVTTL active-low, activate for longer than 5
seconds.
23
ERR_STAT
O
Abnormal indicator, active-high. When the RTK
solution is fixed, it outputs high level, otherwise
outputs low level when the module completes its
self-diagnosis.
24
RTK_STAT
O
RTK positioning indicator, active-high. When the
module’s self-diagnosis system fails, it outputs high
level; otherwise outputs low level when it’s in other
positioning states or no positioning is proceeded.
25
GND
-
Ground
26
SPI_MISO
I
SPI data input
27
SPI_MOSI
O
SPI data output
