GPIO Interfaces – Low Speed Expansion Connectors – Low Speed Expansion Connector 3

This is an additional connector that is not required by the 96Boards specification but provides developers with additional functionality. It provides the following:

  • 1x I2C
  • 1x I3C
  • 3x analog MIC
  • 1x headphone JACK for QRB2210
  • Interrupt signals for sensors
  • Additional GPIOs and power supplies.

The GPIOs labelled QUP have additional low speed interface capabilities (UART, SPI, I2C). Several GPIOs can be used to wake up the application processor.

Wake-up function Additional info SOM pin GPIO Signal Pin Number Signal GPIO SOM Pin Additional info Wake-up function
AMIC2_INP LS3_AMIC2_INP 1 2 LS3_AMIC2_INP AMIC2_INP
32.768Khz U20 SLEEP_CLK 3 4 LS3_AMIC1_INP AMIC1_INP
AMIC3_INM LS3_AMIC3_INM 5 6 LS3_AMIC1_INM AMIC1_INM
QUP2 P17 80 SM_GPIO_80_1P8 7 8 LS3_AMIC3_INP AMIC3_INP
MIC_BIAS2 LS3_MIC_BIAS2 9 10 LS3_MIC_BIAS3 MIC_BIAS3
MIC_BIAS1 LS3_MIC_BIAS1 11 12 DP_AUX_M Reserved
Reserved DP_AUX_P 13 14 HDDET_L** R1 HSDET_L
HPH_REF T1 HPH_REF** 15 16 SM_GPIO_0_MISO_1P8 0 K16 QUP0 Y
HPH_L V1 HPH_L** 17 18 SM_GPIO_1_MOSI_1P8 1 L15 QUP0 N
HPH_R U1 HPH_R** 19 20 SM_GPIO_2_CLK_1P8 2 L16 QUP0 N
NC 21 22 SM_GPIO_3_CS_1P8 3 K15 QUP0 Y
N LPI_QUP_0_SE1 J16 LPI_GPIO_22 SM_LPI_GPIO_22_I3C_SCL 23 24 SM_GPIO_81_1P8 81 M17 Y
N LPI_QUP_0_SE1 J17 LPI_GPIO_21 SM_LPI_GPIO_21_I3C_SDA 25 26 SM_GPIO_32_1P8 32 G1 Y
GND 27 28 SM_GPIO_33_1P8 33 F1 Y
NC 29 30 SM_GPIO_34_1P8 34 E1 Y
NC 31 32 SM_GPIO_35_1P8 35 D1 Y
VPH_PWR 33 34 SM_GPIO_109_SDA_1P8 109 M20 LPI_QUP_0_SE0 Y
1.8V AC20 VREG_L19A_1P8 35 36 SM_GPIO_110_SCL_1P8 110 M21 LPI_QUP_0_SE0 N
5V 37 38 1.8V
VBAT 39 40 GND
GND 41 42 GND
Reserved SPK_OUT_M 43 44 SPK_OUT_P Reserved
NC 45 46 NC
** Dedicated 2210_PMIC_AUDIO only for Qualcomm Robotics RB1 Development kit

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