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unicore UM981 User Manual

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UC-00-M33 EN R1.0 Hardware 7
Table 2-1 Pin Description
No.
Pin
I/O
Description
1
GND
Ground
2
ANT_IN
I
GNSS antenna signal input
3
GND
Ground
4
ANT_DETECT
I
Antenna signal detection
5
ANT_OFF
O
Disable external LNA
6
ANT_SHORT_N
I
Antenna short circuit detection; active low
7
VCC_RF
6
O
External LNA power supply
8
SPIS_CSN
I
Chip select pin for SPI slave
9
SPIS_MOSI
I
Master Out / Slave In. This pin is used to
receive data in slave mode.
10
SPIS_CLK
I
Clock input pin for SPI slave
11
SPIS_MISO
O
Master In / Slave Out. This pin is used to
transmit data in slave mode.
12
GND
Ground
13
RSV
Reserved
14
GND
Ground
15
NC
No connection inside
16
NC
No connection inside
17
NC
No connection inside
18
NC
No connection inside
6
Not recommended to take VCC_RF as ANT_BIAS to feed the antenna. See section 3.2 for more
details.

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unicore UM981 Specifications

General IconGeneral
Brandunicore
ModelUM981
CategoryControl Unit
LanguageEnglish

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