Product Name
EK-AI7933CLD
Version
A
Doc No
912-13903
Date
2022/04/29
Page
17 /26
PRODUCT USER GUIDE
www.acsip.com.tw
Table 4 GPIO pin-out extension connectors
Signal Name
Connector Pin Number
Signal Name
Connector Pin Number
GPIO_0
Reserve for flash
GPIO_27
J87 - 18
GPIO_1
Reserve for flash
GPIO_28
J87 - 20
GPIO_2
Reserve for flash
GPIO_29
J28 - 15
GPIO_3
Reserve for flash
GPIO_30
J28 - 17
GPIO_4
Reserve for flash
GPIO_31
J28 - 19
Reserve for USB OTG
GPIO_5
Reserve for flash
GPIO_32
J28 - 21
Reserve for USB OTG
GPIO_6
J28 - 2
Reserve for Arduino: SPI0_SCK
GPIO_33
J28 - 23
Reserve for USB OTG
GPIO_7
J28 - 4
Reserve for Arduino: SPI0_CSN
GPIO_34
J28 - 25
Reserve for USB OTG
GPIO_8
J28 - 6
Reserve for Arduino: SPI0_MISO
GPIO_35
J28 - 18
GPIO_9
J28 - 8
Reserve for Arduino: SPI0_MOSI
GPIO_36
J28 - 20
GPIO_10
J28 - 10
GPIO_37
J28 - 22
GPIO_11
J28 - 12
GPIO_38
J28 - 24
GPIO_12
J87 - 5
GPIO_39
J28 - 29
Default for AU_AMP_MUTE
GPIO_13
J87 - 7
GPIO_40
J28 - 27
GPIO_14
J87 - 9
GPIO_41
J28 - 1
GPIO_15
J87 - 11
GPIO_42
J28 - 30
Reserve for Arduino: UART1_RX
GPIO_17
J87 - 13
GPIO_43
J28 - 3
GPIO_18
J87 - 15
GPIO_44
J28 - 28
Reserve for Arduino: UART1_TX
GPIO_19
J87 - 17
Reserve for Arduino: I2C1_SDA
GPIO_45
J28 - 5
GPIO_20
J87 - 19
Reserve for Arduino: I2C1_SCL
GPIO_46
J28 - 7
GPIO_21
J87 - 21
GPIO_47
J87 - 2
GPIO_22
J87 - 23
GPIO_48
J87 - 6
Reserve for CM33 UART
GPIO_23
J87 - 25
GPIO_49
J87 - 4
GPIO_24
J87 - 12
GPIO_50
J87 - 8
Reserve for CM33 UART
GPIO_25
J87 - 14
GPIO_51
J28 - 9
GPIO_26
J87 - 16
GPIO_52
J28 - 11
Note: GPIO_39 is AU_AMP_MUTE by default. When using pin headers J28-29pin, resistor R161 needs to be switched to Location of
R160.
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