UM982 User Manual
8
Hardware
UC-00-M31 EN P1.0.0
2.2
Pin Definition
48
47
46
45
44
43
42
41
40
39
38
14
15
16
17
18
19
20
21
22
23
24
Top View
37
36
35
34
33
32
30
29
28
27
26
25
31
1
2
3
4
5
6
8
9
10
11
12
13
7
S
P
IS
_C
S
N
V
_B
C
K
P
G
N
D
G
N
D
A
N
T1
_IN
G
N
D
S
P
IS
_M
O
S
I
S
P
IS
_C
LK
S
P
IS
_M
IS
O
S
P
IS
_S
D
R
Y
R
S
V
R
S
V
R
S
V
G
N
D
A
NT
2_
IN
G
N
D
G
N
D
R
ES
ET
_N
EV
ENT
R
S
V
P
P
S
R
S
V
R
X
D
3
TX
D
3
B
IF
B
IF
RSV
RSV
RSV
GND
ANT2_PWR
GND
ANT1_PWR
GND
RSV
RSV
RSV
ERR_STAT
PVT_STAT
RTK_STAT
RXD1
TXD1
RXD2
TXD2
SCL
SDA
VCC
VCC
Figure2-2 UM982 Pin Definition
Table 2-2 Pin Description
No.
Pin
I/O
Description
1
GND
—
Ground
2
ANT1_IN
I
GNSS master antenna signal input
3
GND
—
Ground
4
GND
—
Ground
5
V_BCKP
I
When the main power supply VCC is cut off,
V_BCKP supplies power to RTC and SRAM.
Level requirements: 2.0 V ~ 3.6 V, and the working
current is about 20 μA at 25 ° C.
Can be floating when the hot start function is not
used.
