GPIO Interfaces – Low Speed Expansion Connectors – Low Speed Expansion Connector 2

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

  • 2x DMIC support
  • Additional I2S audio interface
  • CAN interface
  • Audio amp outputs
  • PM8008 7x LDOs
  • Spare GPIOs
  • Battery ID/therm
  • Other additional functions

Low speed interfaces can be used to control a variety of peripherals, including audio functions.

Wake-up function Additional info SOM pin GPIO Signal Pin number Signal GPIO SOM pin Additional info Wake-up function
Y G17 79 SM_GPIO_79_1P8 1 2 NC
N L21 98 SM_GPIO_98_DMIC CLK1_1P8 3 4 CAN_H from onboard CAN
Y L22 99 SM_GPIO_99_DMIC DATA1_1P8 5 6 CAN_L from onboard CAN
N G16 76 SM_GPIO_76_1P8 7 8 PM_VREG_L20A_1P8_UIM2 V15 1.8V For UIM2
N L20 100 SM_GPIO_100_1P8 9 10 GND
Y K20 101 SM_GPIO_101_1P8 11 12 PM8008_VREG_L2P_1P2 C22 Camera Power
N G15 77 SM_GPIO_77_1P8 (default DVT) / NC (optional) 13 14 PM8008_VREG_L7P_1P8 D22
SD_Detect LS_SD_CARD_DET_N 15 16 PM8008_VREG_L5P_2P8 E22
N G14 78 SM_GPIO_78_1P8 17 18 PM8008_VREG_L4P_2P8 F22
N J20 108 SM_GPIO_108_I2S_MCLK_1P8* 19 20 PM8008_VREG_L1P_1P2 C21
Y J21 105 SM_GPIO_105_I2S_DATA_1P8 (default DVT)/ NC (optional) 21 22 PM8008_VREG_L6P_2P8 D21
Y K22 102 SM_GPIO_102_I2S_CLK_1P8 (default DVT)/ NC (optional) 23 24 PM8008_VREG_L3P_2P8 E21
Y K21 103 SM_GPIO_103_I2S_WS_1P8 (default DVT)/ NC (optional) 25 26 PM_FLASH_LED1 V10 PM_FLASH_LED
from onboard WSA SPK0_P 27 28 PM_FLASH_LED1 V11
from onboard WSA SKP0_M 29 30 PM_FLASH_LED2 V8
from onboard WSA SPK1_P 31 32 PM_FLASH_LED2 V9
from onboard WSA SPK1_M 33 34 PM_VREG_L22A_2P96 V16 2.96 V For SD CARD
NC 35 36 BATT_THERM AA6 BATT_THERM
PM_GPIO_06 AC19 PM_GPIO_06 PM_GPIO_06_4P2 37 38 BATT_ID AA5 BATT_ID
VBAT 39 40 USB_VBUS USB_VBUS
GND 41 42 GND
N F15 73 SM_GPIO_73_1P8 43 44 SM_GPIO_75_1P8 75 F17 Y
N F14 74 SM_GPIO_74_1P8 45 46 SM_GPIO_72_1P8 72 F16 Y
* Dedicated I2S_MCLK and WSA8815 Mclk (Cannot be used for other functions)

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