UM620N User Manual
UC-00-M30 EN R1.0
Technical Specifications
9
3.4
Pin Definition
SDA / SPI CS_N
SCL / SPI CLK
TXD1 / SPI MISO
RXD1 / SPI MOSI
VCC
TIME PULSE
NC
NC
LNA_EN
NC
DEL
nRESET
VCC_RF
GND
RF_IN
GND
V_BCKP
GND
GND
NC
TXD2
RXD2
nRESET
Top View
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
NC
Figure 3-2 Pin Assignment
Pin No.
Name
I/O
Electrical Level Description
1
nRESET
I
LVTTL
Reset. Active low.
Leave it floating if not in use.
2
DEL
I
—
Interface selection pin.
If DEL is set low level, SPI is available.
If DEL is set high or floating, UART and
I
2
C become available.
3
TIMEPULSE
O
LVTTL
Time pulse (1PPS)
4
NC
—
—
Floating
5
RXD2
I
LVTTL
UART 2 receiving data
6
TXD2
O
LVTTL
UART 2 transmitting data
7
NC
—
—
Floating
8
nRESET
I
LVTTL
Reset. Low active.
Leave it floating if not in use.
9
VCC_RF
O
Antenna feed output.
It is recommended to use an external
power supply rather than VCC_RF to
feed the antenna.
10
GND
—
—
Ground
