GPIO Interfaces – Low Speed Expansion Connectors – Low Speed Expansion Connector 1

The Low-Speed Expansion connector 1 is compatible with 96Boards specification. To use the LS 1, toggle switch 2 of DIP_SW_1 on the Mainboard.

LS1 provides the following interfaces:

  • 2x UART
  • 2x I2C (one of two is Low Power Island (LPI) I2C for sensor)
  • 1x SPI
  • 12x GPIOs
  • DC power
  • Ground

The GPIOs labelled QUP have additional low speed interface capabilities (UART, SPI, I2C). For more details on how to use the QUP interfaces, please request access to the Qualcomm® QRB2210 and Qualcomm® QRB4210 documentation on www.qualcomm.com. For the pin map and GPIO details, see the QRB2210 and QRB4210 Pin Assignment and GPIO Configuration Spreadsheets.

Several GPIOs can be used to wake up the application processor.
Low speed interfaces can be used to control a variety of peripherals, motors, sensors, etc. Audio interface is also available.

Wake-up function Additional info SOM pins GPIO Signal Pin number Signal GPIO SOM pin Additional info Wake-up function
GND 1 2 GND
Y QUP0 K16 0 UART0_CTS 3 4 KYPD_PWR_N W1 POWER_ON
N QUP0 L16 2 UART0_TXD 5 6 KYPD_VOL_DOWN_N W2 VOL-
Y QUP0 K15 3 UART0_RXD 7 8 SM_GPIO_16_SCLK_1P8 16 N16 QUP5 N
N QUP0 L15 1 UART0_RTS 9 10 SM_GPIO_14_MISO_1P8 14 M15 QUP5 Y
N QUP4 P22 12 UART1_TXD 11 12 SM_GPIO_17_CS_1P8 17 N15 QUP5 Y
Y QUP4 N22 13 UART1_RXD 13 14 SM_GPIO_15_MOSI_1P8 15 M16 QUP5 N
N QUP2 R17 7 SM_GPIO_7_SCL_1P8(default DVT)/SM_GPIO_112_1P8 (optional 96board) 15 16 NC (default)/SM_GPIO_103_I2S_WS_LS1 (optional 96board)
Y QUP2 R16 6 SM_GPIO_6_SDA_1P8 (default DVT)/SM_GPIO_111_1P8 (optional 96board) 17 18 NC (default DVT)/SM_GPIO_102_I2S_CLK_LS1 (optional 96board)
N QUP2 R17 7 SM_GPIO_7_SCL_1P8 19 20 SM_GPIO_111_1P8 (default DVT)/SM_GPIO_104_I2S_DATA0_LS1 (optional 96board) 111 H2 LPI_QUP 0 SE5 N
Y QUP2 R16 6 SM_GPIO_6_SDA_1P8 21 22 NC (default DVT)/SM_GPIO_104_I2S_DATA1_LS1 (optional 96board)
Y QUP1 N21 4 SM_GPIO_4_SDA_1P8 23 24 SM_GPIO_40_1P8 40 B3 N
N QUP1 P21 5 SM_GPIO_5_SCL_1P8 25 26 PM+GPIO_08_BL_PWM_OUT
N QUP1 P16 71 SM_GPIO_71_1P8 27 28 SM_GPIO_44_1P8 44 D2 CAM0B_RST N
Y C1 36 SM_GPIO_36_1P8 29 30 PM_GPIO_97_4P2 PM4250_GPIO_08 T20 LCD_BL_PWM
Y CAM0A_RST B12 18 SM_GPIO_18_1P8 [96BRD_GPIO-I] 31 32 NC (default DVT)/SM_GPIO_77_1P8_LS1(optional 96board)
Y CAM1_RST_N G6 24 SM_GPIO_24_1P8 33 34 NC (default DVT)/SM_GPIO_74_1P8_LS1 (optional 96board) 97 H8 QUP4 Y
From DCDC Onboard 1.8V 35 36 DC12V DC 12 V from Board
From DCDC Onboard 5V 37 38 DC12V DC 12 V from Board
GND 39 40 GND

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