User Manual

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4.2 GPIO Interface
All GPIOs are capable of sinking and sourcing 4mA of I/O current.
4.3 UART Interface
The UART is compatible with the 16550 industry standard. Four signals are provided with the UART
interface. The TXD and RXD pins are used for data while the CTS and RTS pins are used for flow
control.
Connection to Host Device
Typical RS232 Circuit