Smart Module Series
SA800U-WF Hardware Design
SA800U-WF_Hardware_Design 78 / 106
3.21. Sensor Interfaces
SA800U-WF
has an integrated sensor subsystem called the Snapdragon sensor core, which is dedicated
to support low-power, always-on use cases. Snapdragon sensor core
supports communication with
sensors via I2C interface and SPI interface, and it supports various sensors such as acceleration sensor,
gyroscopic sensor, compass, optical sensor, temperature sensor.
Snapdragon sensor core pins cannot
be used for non-Snapdragon sensor core cases. They are dedicated for Snapdragon sensor core DSP.
Table 28: Pin Definition of Sensor Interfaces
Pin Name
Pin No.
I/O
Description
Comment
SSC_SPI1_CS0
J1-136
DO
Sensor core SPI1 chip select 0
1.8 V power domain.
SSC_SPI1_CS1
J1-138
DO
Sensor core SPI1 chip select 1
SSC_SPI1_CS2
J1-140
DO
Sensor core SPI1 chip select 2
SSC_SPI1_CLK
J1-154
DO
Sensor core SPI1 clock
SSC_SPI1_MOSI
J1-152
DO
Sensor core SPI1 master-out
slave-in
SSC_SPI1_MISO
J1-150
DI
Sensor core SPI1 master-in
salve-out
SSC_SPI2_CS
J1-141
DO
Sensor core SPI2 chip select
SSC_SPI2_CLK
J1-145
DO
Sensor core SPI2 clock
SSC_SPI2_MOSI
J1-143
DO
Sensor core SPI2 master-out
slave-in
SSC_SPI2_MISO
J1-147
DI
Sensor core SPI2 master-in
salve-out
SSC_I2C1_SDA
J2-8
OD
Sensor core I2C1 data
SSC_I2C1_SCL
J2-10
OD
Sensor core I2C1 clock
MAG_INT
J1-133
DI
Magnetic sensor interrupt
MAG_DRDY_INT
J1-135
DI
Magnetic sensor DRDY interrupt
GYRO_INT
J1-137
DI
Gyroscopic sensor interrupt
ACCEL_INT
J1-139
DI
Acceleration sensor interrupt
