CLM920_RC3(RV3 RE3)LCC Series CAT1 Module Hardware Manual
Shanghai YUGE Information Technology Co., Ltd.
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domain
32
SDC_CLK
IO
SD card SDIO bus clock
1.8V / 2.8V voltage
domain
33
SDC_CMD
IO
SD card SDIO bus command
1.8V / 2.8V voltage
domain
34
VDD_SD
PO
SD card power supply voltage This power supply
has an exclusive
choice as SD card
power supply and
GPS power supply
SPI interface
Pin
Definition
IO
Functional description
Remarks
37
SPI_CS
DO
SPI chip select signal
1.8V voltage domain
38
SPI_MOSI
DO
SPI data output
1.8V voltage domain
39
SPI_MISO
DI
SPI data input
1.8V voltage domain
40
SPI_CLK
DO
SPI clock signal
1.8V voltage domain
I2C interface
Pin
Definition
IO
Functional description
Remarks
41
I2C_SCL
DO
I2C bus clock
Internal 4.7K pull-up
42
I2C_SDA
IO
I2C bus data
Internal 4.7K pull-up
ADC interface
Pin
Definition
IO
Functional description
Remarks
44
GPADC1
AI
12bits universal
analog-to-digital
conversion
Input range 0 ~ 1.2V
45
GPADC0
AI
12bits universal
analog-to-digital
conversion
Input range 0 ~ 1.2V
RF interface
Pin
Definition
IO
Functional description
Remarks
47
ANT_GNSS
AI
GNSS antenna
50 ohm characteristic
impedance