Specifications

Smart Machine Smart Decision
SIM7080G _Hardware Design _V1.03 17 2019-12-13
UART2_RXD
23
DI,PU
softwaresecondary development.
Cannot be used as AT
communication port.
unused, keep them open.
UART3_TXD
61
DOH
The default function is GPIO.It
cannot be used as AT
communication port. Butitcan be
used for softwaresecondary
development. It can also be
configured as NMEA data output
for GNSS.
If unused, keep them open.
UART3_RXD
62
DI,PU
I2C interface
I2C_SDA
64
I/O
I2C clock output
If unused, keep open, or else
pull them up via1KΩ resistors
to the VDD_EXT.
I2C_SCL
65
DO
I2C data input/output
PCM interface
PCM_DIN
9
DI
PCM data input.
If unused, please keep them
open.
PCM_DOUT
10
DO
PCM data output.
PCM_CLK
11
DO
PCM data bit clock.
PCM_SYNC
12
DO
PCM data frame sync signal.
SPI interface
SPI_CS
48
DO
Chip Select
If unused, please keep them
open.
SPI_MOSI DO NOT PULL UP
DURING NORMAL POWER
UP!
SPI_MOSI
49
DO
Main Controller DATA output.
Note: This chip pin has fast boot
function. It cannot be pulled up
before booting. Otherwise it will
affect the normal boot.
SPI_CLK
50
DO
Bus clock output
SPI_MISO
51
DI
Main Controller DATA input
GPIO
NETLIGHT
41
DO
LED control output as network
status indication.
If unused, keep them open.
STATUS
42
DO
Operating status output.
High level: Power on and
firmware ready
Low level: Power off
GPIO1
57
IO
GPIO
GPIO2
58
IO
GPIO
GPIO3
59
IO
GPIO
GPIO4
60
IO
GPIO
GPIO5
14
IO
GPIO
RF interface
GNSS_ANT
68
AI
GNSS antenna soldering pad
RF_ANT
32
AIO
MAIN antenna soldering pad