sparkfun DEV-17272 Hook-Up Manual page 16

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USB_D-
RESET
USB_VIN
D0
BOOT
I2C_SDA
UART_RTS1
I2C_SCL
UART_CTS1
I2C_INT#
UART_RX1
D1
UART_TX1
UART_RX2
SWDCK
UART_TX2
SWDIO
PWM0
Passthrough
RESET Button
VIN
SPI PTH CS/D0 PTH
BOOT Button
I2C_SDA
SARA RTS_I
I2C_SCL
SARA CTS_O
IMU INT
SARA TXD_O
D1
SARA TXD_I
SARA DCD_O/RXD2_O
SWDCK
SARA DTR_I/TXD2_I
SWDIO
PWM0
USB D- connection for
Processor Board.
Connected to RESET
Button. Reset is active
LOW
Input voltage from USB.
SPI Chip Select for SPI
PTH Header. D0 also
broken out for I/O PTHs
Connected to BOOT
Button. Boot is active
LOW.
2
I C data for Fuel Gauge
& Qwiic connector
UART Request to Send
for SARA
2
I C clock for Fuel Gauge
& Qwiic connector
UART Clear to Send for
SARA
IMU Interrupt pin
SARA UART Data Iutput
General digital I/O PTH
SARA UART Data Output
SARA UART Data Carrier
Detect / AUX UART Data
Output
Serial Wire Debug Clock
SARA UART Data
Terminal Ready / AUX
UART Data Input
Serial Wire Debug I/O
PWM0 PTH