User's Manual

SIM7075G User Manual V1.00
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SIM_DET
42
DI
SIM card detect, the module is not
support hot-swap function.
USIM_GND
47
Ground for SIM Card
USB*
USB_VBUS
8
DI,PD
Valid USB detection input with
3.5~5.25V detection voltage
Software download
interface. It is
recommended to
reserve interfaces or
test points.
USB_DP
9
I/O
Positive line of the differential,
bi-directional USB signal.
USB_DM
10
I/O
Negative line of the differential,
bi-directional USB signal.
UART interface
UART1_DTR
30
DI,PH
DTE get ready
If unused, keep them
open.
UART1_RXD
34
DI,PL
Receive Data
UART1_TXD
35
DOH
Transmit Data
UART1_CTS
36
DOL
Clear to Send
UART1_RTS
37
DI,PL
Request to send
UART1_DCD
38
DOH
Carrier detects
UART1_RI
39
DOH
Ring Indicator
DEBUG_RXD
22
DI,PL
The default function is GPIO, and
UART is only used for software
secondary development. Cannot be
used as AT communication port.
Debug UART, the boot
log will be output during
boot up. If unused, keep
them open.
DEBUG_TXD
23
DOH
GNSS_UART_
TXD
27
DO
GNSS transmit data
If unused, keep them
open.
GNSS_UART_
RXD
28
DI
GNSS receive data
I2C interface
I2C_SCL
40
OD
I2C clock output
If unused, keep open,
or else pull them up
via1KΩ resistors to the
VDD_EXT.
I2C_SDA
41
OD
I2C data input/output
PCM interface
PCM_CLK
4
DO
PCM data bit clock.
If unused, please keep
them open.
PCM_SYNC
5
DO
PCM data frame sync signal.
PCM_DIN
6
DI
PCM data input.
PCM_DOUT
7
DO
PCM data output.
SPI interface
SPI_MOSI
19
DO
Main Controller DATA output.
Multiplexed by GPIO1
If unused, please keep
them open.
SPI_MISO
20
DO
Main Controller DATA input.
Multiplexed by GPIO2
SPI_CLK
21
DI
Bus clock output,
Multiplexed by GPIO3
SPI_CS
48
DO
Chip Select,
Multiplexed by GPIO5