SPBT2632C2A

Hardware design

Doc ID 022833 Rev 4

17/27

Figure 5.

Soldering profile

7.2

GPIO interface

All GPIOs are capable of sinking and sourcing 4 mA of I/O current. GPIO [1] to GPIO [7] are

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 6.

Connection to host device