unicore UM982 - Hardware Overview; Pin Definition; Ground Pins (GND); ANT1_IN Pin

UM982 User Manual
6 Hardware UC-00-M31 EN R1.2
2 Hardware
2.1 Pin Definition
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Top View
37 36 35 34 33 32 30 29 28 27 26 2531
1 2 3 4 5 6 8 9 10 11 12 137
SPIS_CSN
V_BCKP
GND
GND
ANT1_IN
GND
SPIS_MOSI
SPIS_CLK
SPIS_MISO
SPIS_SDRY
RSV
RSV
RSV
GND
ANT2_IN
GND
GND
RESET
_N
EVENT RSV
PPS
RSV
RXD3
TXD3
BIF
BIF
RSV
RSV
RSV
GND
RSV
GND
RSV
GND
RSV
RSV
RSV ERR_STAT
PVT_STAT
RTK_STAT
RXD1
TXD1
RXD2
TXD2
SCL
SDA
VCC
VCC
Figure 2-1 UM982 Pin Definition
Table 2-1 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 relevant
register. Level requirement: 2.0 V ~ 3.6 V, and the
working current should be less than 60 μA at
25 °C. If you do not use the hot start function,
connect V_BCKP to VCC. Do NOT connect it to