UNICORECOMM UM620N, User Manual

Page: 14 / 19

10 Technical Specifications UC-00-M30 EN R1.0
Pin No. Name I/O Electrical Level Description
11 RF_IN I — GNSS signal input
12 GND — — Ground
13 GND — — Ground
14 LNA_EN O — Enable external LNA
15 NC — — Floating
16 NC — — Floating
17 NC — — Floating
18
SDA / SPI
CS_N
— —
I 2 C data (D_SEL=VCC or floating)/SPI
chip select (D_SEL=GND)
19
SCL / SPI
CLK
— —
I 2 C clock (D_SEL=VCC or floating)/SPI
clock (D_SEL=GND)
20
TXD1/ SPI
MISO
O LVTTL
SPI Master In Slave Out (D_SEL=GND)/
UART TXD signal (D_SEL=VCC or
floating)
21
RXD1/ SPI
MOSI
I LVTTL
SPI Master Out Slave In (D_SEL=GND)/
UART RXD signal (D_SEL=VCC or
floating)
22 V_BCKP I 1.7V~3.6V
Backup voltage supply, applicable for
hot start. If you do not use hot start,
connect V_BCKP to VCC. Do NOT
connect it to ground or leave it floating.
23 VCC — 2.7V~3.6V Supply voltage
24 GND — — Ground