SecureIoT1702 Jumper Options

The SecureIoT1702 Development Board has several jumpers, summarized as follows:

Jumper Description Details
X1 Voltage Reference Input Select Selects the positive voltage input to the VREF_ADC pin. Shorting the center pin to “VREF” will provide a Vdd/3.3 V reference. Shorting the center pin to “VPP” will provide a reference voltage of ~1.59 V when the VPP_EN pin (GPIO012) is driven high; this voltage is required by the CEC1702’s eFUSE programming sequence. For additional information, refer to the eFUSE chapter of the CEC1702 datasheet.
X4 Serial Converter Input Select Selects the UART1 RX source. Shorting the center pin to “mikroBUS™” will allow the CEC1702 to receive UART input from the mikroBUS 2 connector. Shorting the center pin to “USB UART” will allow the CEC1702 to receive UART input from the FT230X USB-Serial converter.
X11 3.3 V Current Sense Provides a test point to measure the power consumption on the 3.3 V rail. Removing this jumper will also hard-reset the board.
X15 ADC Header Pull-up Enables a 3.3 V pull-up for the Analog-to-Digital Converter expansion header.

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