Intrinsyc Open-Q 835, User Manual

Page: 27 / 42

Open-Q™ 835 Development Kit based on the Snapdragon™ 835 (APQ8098) Processor User Guide Version 1.0
27
Copyright Intrinsyc Technologies Corporation
3.8.9 Sensor IO Expansion Header J2501
Figure 12 J2501 Sensor Expansion Header
The sensor expansion header J2501 allows for a 24-pin connection to an optional sensor
board. If user application does not require a sensor, then this header can be used for other
applications that require I2C or GPIO input and output connections.
Following is the pin out for sensor expansion header J2501.
Table 3.8-9 Sensor Expansion Header J2501 Pin out
Description Signal Pin NO Description Signal Pin NO
SSC I2C-3
serial data
SSC_I2C_3_SDA J2501[1] Accelerometer
interrupt input to
processor via
GPIO117 ACCEL_INT_N J2501[2]
SSC I2C-3
serial clock SSC_I2C_3_SCL J2501[3] Cap interrupt
input to processor
via GPIO123 CAP_INT_N J2501[4]
Sensor reset
signal from
processor to
sensor via
GPIO126
MEMS_RESET_N
J2501[5] Gyroscope
interrupt input to
processor via
GPIO118 GYRO_INT J2501[6]
Sensor IO PWR
1.8 V
VREG_LVS2A
_1P8 power
supply regulator
(Digital)
SENS_IO_PWR J2501[7] Sensor Analog
power supply
from
VREG_L19A
2.85V or 3.3V SENS_ANA_P WR J2501[8]
GND GND J2501[9] GND GND J2501[10]
HRM interrupt/
configurable
GPIO122 HRM_INT J2501[11] Touch screen
interrupt input
from processor
via GPIO125 TS_INT0 J2501[12]
SSC SPI-1
chip select 2
SSC_SPI_1_CS1_N J2501[13] Alternate sensor
interrupt input to
processor via
GPIO120 ALSPG_INT_N J2501[14]
MISC GPIO for
sensor via
GPIO84
APQ_GPIO84 J2501[15] Digital Compass
interrupt input to
processor via
GPIO119 MAG_DRDY_I NT J2501[16]