Hardware design

SPBT2532C2.AT2

18/27

Doc ID 023461 Rev 1

Figure 6.

Soldering profile

7.2

GPIO interface

All GPIOs are capable of sinking and sourcing 4 mA of I/O current. GPIO [1] is internally

pulled down with 100 k

Ω (nominal) resistors.

7.3

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.

Figure 7.

Connection to host device