Ssc I2C; Sensor Interrupt; Other Signals On Tertiary Low Speed Connector - Thundercomm TurboX C865 Dev Kit Hardware User's Manual


SPI2_ACCEL_CS_LS3: Connects to SSC QUP2 of SM8250 SoC, to be configured to CS.

SPI2_CS1: Connects to SSC QUP2 of SM8250 SoC, to be configured to gyroscope CS.

SPI3_CLK: Connects to SSC QUP5 of SM8250 SoC, to be configured to CLK.

SPI3_MOSI: Connects to SSC QUP5 of SM8250 SoC, to be configured to MOSI.

SPI3_MISO: Connects to SSC QUP5 of SM8250 SoC, to be configured to MISO.

SPI3_CS: Connects to SSC QUP5 of SM8250 SoC, to be configured to CS.

SPI3_CS1: Connects to SSC QUP5 of SM8250 SoC, to be configured to gyroscope CS.
The DIP switch (see Section 1.2.2, #16) pin5 is used to select between the onboard 6-axis sensor ICM-
42688 and expansion connector. When set to ON, will enable SPI to LS3; when set to OFF, will enable
SPI to on board sensor ICM_42688.

4.3.2 SSC I2C

The C865 DEV KIT implements a SSC I2C interface for different sensors that connect to SM8250
sensor core. 2.2k resistors are used in SOM to pull signals up for each of the I2C lines per the I2C
specifications. The signals are:

I2C4_SDA: Connects to SSC QUP0 of SM8250 SoC, Be configured to I2C SDA.

I2C4_SCL: Connects to SSC QUP0 of SM8250 SoC. Be configured to I2C SCL

4.3.3 Sensor interrupt

The C865 DEV KIT implements a SSC interrupt for sensor interrupts that is the 1.8V voltage rail. The
signals are:

ACCEL_INT: Connects to GPIO_112 of SM8250 SoC, Be configured to Accelerometer INT.

GYRO_INT: Connects to GPIO_113 of SM8250 SoC, Be configured to Gyroscope INT.

MAG_DRDY_INT: Connects to GPIO_123 of SM8250 SoC, Be configured to Magnetometer
data INT.

MAG_INT: Connects to GPIO_122 of SM8250 SoC, Be configured to Magnetometer INT.

PS_INT: Connects to GPIO_129 of SM8250 SoC, Be configured to Proximity INT.

4.3.4 Other signals on Tertiary Low Speed Connector

The C865 DEV KIT board implements more source voltage at the Lowe Speed Expansion Connector.
The signals are:

VREG_L5C_1P8: Connects to L5 LDO of PM8250 PMIC, Can be as sensor IO voltage source.
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